Marc's Public Blog


All | Aquariums | Arduino | Btrfs | Cars | Cats | Clubbing | Dining | Diving | Electronics | Exercising | Flying | Hiking | Linux | Linuxha | Museums | Public | Rc | Sciencemuseums | Snow | Solar | Trips




More pages: July 2018 June 2018 May 2018 April 2018 March 2018 February 2018 January 2018 December 2017 November 2017 October 2017 September 2017 August 2017 July 2017 June 2017 May 2017 April 2017 March 2017 February 2017 January 2017 December 2016 November 2016 October 2016 September 2016 August 2016 July 2016 June 2016 May 2016 April 2016 March 2016 February 2016 January 2016 December 2015 November 2015 October 2015 September 2015 August 2015 July 2015 June 2015 May 2015 April 2015 March 2015 February 2015 January 2015 December 2014 November 2014 October 2014 September 2014 August 2014 July 2014 June 2014 May 2014 April 2014 March 2014 February 2014 January 2014 December 2013 November 2013 October 2013 September 2013 August 2013 July 2013 June 2013 May 2013 April 2013 March 2013 February 2013 January 2013 December 2012 November 2012 October 2012 September 2012 August 2012 July 2012 June 2012 May 2012 April 2012 March 2012 February 2012 January 2012 December 2011 November 2011 October 2011 September 2011 August 2011 July 2011 June 2011 May 2011 April 2011 March 2011 February 2011 January 2011 December 2010 November 2010 October 2010 September 2010 August 2010 July 2010 June 2010 May 2010 April 2010 March 2010 February 2010 January 2010 December 2009 November 2009 October 2009 September 2009 August 2009 July 2009 June 2009 May 2009 April 2009 March 2009 February 2009 January 2009 December 2008 November 2008 October 2008 September 2008 August 2008 July 2008 June 2008 May 2008 April 2008 March 2008 February 2008 January 2008 December 2007 November 2007 October 2007 September 2007 August 2007 July 2007 June 2007 May 2007 April 2007 March 2007 February 2007 January 2007 December 2006 November 2006 October 2006 September 2006 August 2006 July 2006 June 2006 May 2006 April 2006 March 2006 February 2006 January 2006 December 2005 November 2005 October 2005 September 2005 August 2005 July 2005 June 2005 May 2005 April 2005 March 2005 February 2005 January 2005 December 2004 November 2004 October 2004 September 2004 August 2004 July 2004 June 2004 May 2004 April 2004 March 2004 February 2004 January 2004 October 2003 August 2003 July 2003 May 2003 April 2003 March 2003 January 2003 November 2002 October 2002 July 2002 May 2002 April 2002 March 2002 February 2002 November 2001 October 2001 September 2001 August 2001 July 2001 June 2001 May 2001 April 2001 March 2001 February 2001 January 2001 December 2000 November 2000 October 2000 September 2000 August 2000 July 2000 June 2000 April 1999 March 1999 September 1997 August 1997 July 1996 September 1993 July 1991 December 1988 December 1985 January 1980



2007/08/28 Dad's visit
π 2007-08-28 21:28 by Merlin in Family

My dad came over for a week this year, and we used the time to first fly to Reno, to see a magic show there he had heard good things about.
Reno itself, was pretty boring and easy to see in half a day, so we kind of wasted a day by getting there early, but the magic show itself was quite well done and worth it. The 3rd day, we opted to go to Virginia City, a nearby mining town, which was actually much more interesting to see than Reno itself.
Since we met some magicians while we were there, and they told us that there was also a magic show to go see in South Lake tahoe, we then flew to the airport there, saw the show, and headed back home the next morning. BTW, South Lake Tahoe Casinos think it's ok to charge $300/night. WTF is wrong with them?
When we got home for the weekend, we went to see the Mystery Spot in Santa Cruz with Jennifer and had lunch on the pier. The Mystery Spot was somewhat entertaining, although the way they "sell" it is a bit lame. Pretending that they have different gravity there, when most of their stuff is based on optical illusions, and fooling of one's balance, is just silly.
The last day, my dad wanted to a ride in the F430, so we went to San Francisco via Skyline, which was the only decent way to get there in my opinion :) Unfortunately, although I practised reasonably sedate driving (for the most part, I was going slowly enough that I didn't even have to use the brakes much at all), the ride still felt a bit too fast for my dad, probably both because of the cornering capabilities of the car (i.e. high grip turns), and the fact that you are low to the ground in a convertible. Once in SF, we went to Pier39 for some looking around and lunch.
The next day, I saw him off to SJC and he flew home
The rest of the pictures are here .







Those were the only pretty things to see in Reno :)


But the real reason we were there was the Magic Show there


Since Reno sucked ass like I told my dad it would :), we went to Virginia City, an old still mostly authentic mining town


South Lake Tahoe




Santa Cruz


A quick break on skyline



2007/08/18 2007/08/10-17: John Muir Trail from Bishop Pass to Mt Whitney
π 2007-08-18 13:29 by Merlin in Hiking

Foreword


Jennifer had started the John Muir Trail southbound several years back, but her group hit a freak snow storm in early september and had to back out from Palisades Lakes back down to the Golden Staircase, and out Bishop Pass (with much difficulty since this was in fresh snow). Since then, she had wanted to go back and finish the trail, which is what we did this time.
We had planned for up to ten days of hiking, hoping to finish it in 9. We actually managed to get out at the end of day 8.
I had no desire to do the lonely and long 6-8 hour two car drive to Lonepine and Bishop to have a car waiting for us at the exit while leaving the first car at the entrance, so I managed to find a plane I was able to rent for 10 days (which is a bit hard to do), and we ended up flying to Bishop (the other option being to fly to lonepine and catching a bus to Bishop, which was a bit iffy if you missed the bus).
Of course, this now meant that we had to find a ride from bishop airport to city center, one from the hotel to the trail head the next day, and then one from Lonepine back to Bishop at the end. This isn't as easy as it seems because there is virtually no public transportation there (Bishop has a dial a ride system which doesn't work on weekends), and no taxis. Luckily, we found some nice locals who offered their driving services for a fee. Getting dropped at South Lake Trailhead in Bishop was $50, and getting a ride back from Whitney Portal Trailhead, through Lonepine and to Bishop was $100, which was actually a good price considering it's a 1H+ drive.
That whole plan worked out fine, except for the fact that like an idiot, I forgot half my luggage in the trunk of my car in Palo Alto and only found out after landing in Bishop, so I had to fly back to Palo Alto to pick it up (that was thursday 9th). Luckily, I had a fast plane and did the round trip in less than 3H (vs 12H+ of driving) while Jennifer went to the ranger station and picked up our permits.


As for our backpacks, this time we had to carry a fair amount of food to last 2 people for up to 10 days. Neither Jennifer nor I had much spare fat to burn, so we couldn't go too low on the calories. I figured we had to eat at least 2500cal/day, which was still a good 1000 to 1500 calorie difficiency per day, but with each gram of carb/protein giving 4 cals, and each gram of fat giving 9 cals, it worked out to one pound of high fat foods was about 2500 cals. So, in theory we needed 20 pounds of food for 2 people over 10 days.
The food that Jennifer computed separately ended up weighing 25 pounds when you add the two packed ursacks S29, which was very darn close to what I had computed.


While we found out later that unfortunately, some bears around Rae Lakes actually beat the ursacks (one chewed through the bag and the aluminum liner apparently, while another bear walked away with the ursack to work on opening it later), I was still thankful that there were conditionally approved at the time and that we were able to shed some load and space compared to the heavier and bulkier bear canisters.
In the end, my pack (which was an ultralight 2.2lbs 60l bag) weighed a hefty 52lbs with all the food, cooking ware, water filter, clothes, and more. On top of that were several pounds with the water (up to 9lbs if I filled up my camelback and my nalgene), to which I had to add my fanny pack with another 8lbs of stuff (emergency radio, GPS, batteries, solar chargers, cables, swiss army knife, duct tape, med kit, etc...). I know I could have shedded some weight there, although I wanted to test some of the equipment and I was hoping that I'd be able to cope with a 60-65lbs load, even if my weight was around 157, and it was clearly way beyond the recommended "not more than a third of your weight" rule.
In hindsight, I could have shedded 2-3lbs without missing anything, but the rest would have been at the expense of the trip quality (no GPS, camera, etc...), or safety (no radio), so I don't have much regrets. I was almost tempted ot bring a second water filter, seeing how many moving parts and seals those things have, and little it takes for them to fail, leaving you with drinking questionable water.
Jennifer had 25-27lbs in her pack, which is obviously less, but was plenty of challenge for her uphill (she would however beat me downhill because I just wasn't nimble enough with all that stuff on my back and had to step down carefully). She was a bit disappointed for not being able to carry more, as she had been training for the last year, but my guess is that while she had plenty of cardio, she was light on core body strength and leg muscles (squats, walking lunges uphill while carrying weights, etc...). For me, since I had been doing boot camp for the last 4 years or so, I was actually doing well enough with the 65lbs uphill, and felt fine when my weight dropped to 55lbs or so.

On the GPS front, I had just bought/upgraded to a Etrex Legend HCx (I bought the legend initially because I'm pissed at Garmin for not allowing me to turn off incorrect baro altitude in pressurized planes). The Etrex did a pretty good job of recording the track, although it kept telling me that I had less than I really did, and then would record longer tracks each day (no, it's not user error :) ). I also still had the forerunner for the convenience of having altitude and distance done each day at my wrist, as well as heart rate to see if I was pushing a bit too hard when going uphill with all that weight.

Here are the results for the trip (the calories are of course all wrong, Garmin doesn't know how to compute them, but it gives a point of reference):









Day Moving Speed Avg Speed Distance Moving Time Total Time Avg Heart Rate Max HR Total Ascent/Descent Min/Max Elevation Cals
08/10 2.3mph 1.2mph 12.52mi 6H08 9H03 124bpm 151pbm +4033ft/-4960ft 8622ft/11968ft 1604
08/11 2.1mph 1.2mph 10.61mi 5H06 7H31 123bpm 147pbm +4870ft/-2710ft 7867ft/10853ft 1376
08/12 2.1mph 1.1mph 10.99mi 5H20 9H05 115bpm 145pbm +4382ft/-3907ft 10039ft/12109ft 1363
08/13 2.2mph 1.3mph 11.86mi 5H23 9H30 116bpm 152pbm +3800ft/-4642ft 8474ft/12135ft 1465
08/14 2.0mph 1.2mph 10.92mi 5H30 8H28 111bpm 147pbm +4144ft/-3923ft 9478ft/120004ft 1404
08/15 2.3mph 1.4mph 14.08mi 6H02 9H38 115bpm 149pbm +4604ft/-4377ft 10308ft/13208ft 1727
08/16 2.1mph 1.1mph 08.07mi 3H54 7H15 107bpm 144pbm +4324ft/-2565ft 10262ft/12240ft 1039
08/17 2.1mph 1.4mph 14.10mi 5H35 9H49 115bpm 147pbm +4453ft/-7468ft 8366ft/14514ft 1532
Total Ascent: 34,807ft (> 10,000m)
Total Descent: 34,835ft (> 10,000m)
Total Distance: 93 miles (> 150km)
Min Altitude: 7,867ft
Max Altitude: 14,514ft








you can click pictures or waypoint on the google map, switch from terrain mode to satellite or mytopo. You can also click on all the pictures below to see where they are on the map

Day 1: Bishop Pass









Day Moving Speed Avg Speed Distance Moving Time Total Time Avg Heart Rate Max HR Total Ascent/Descent Min/Max Elevation Cals
08/10 2.3mph 1.2mph 12.52mi 6H08 9H03 124bpm 151pbm +4033ft/-4960ft 8622ft/11968ft 1604

We got a ride up to South Lake and arrived at the trail head around 10:00.
The funny thing is that we met my friend and coworker Arturo and ski buddy Bill at the trail head. What are the odds of that?
We were however not able to keep up with them since they were lighter weight, and Jennifer had tried to take some weight off me, which slowed her down too much (I took that extra weight back soon afterwards and we did better).

Obviously, I did feel the almost 65lbs on my back (with water), but I was able to carry them up to the top of Bishop Pass without any major problems. That was our first 12,000ft peak (well, close to it), and we went through it fine (the diamox probably helped a bit).

We had enough time to hike down to LeConte Canyon and log a mile or two on the John Muir trail before finding a nice camp site where we were able to have our first and only camp fire (every other night, we were higher than 10,000ft and fires were forbidden there)















Top of Bishop Pass



our only camp fire...




Day 2: Golden Staircase







Day Moving Speed Avg Speed Distance Moving Time Total Time Avg Heart Rate Max HR Total Ascent/Descent Min/Max Elevation Cals
08/11 2.1mph 1.2mph 10.61mi 5H06 7H31 123bpm 147pbm +4870ft/-2710ft 7867ft/10853ft 1376

We were a bit slow to get ready in the morning due to bad synchronization and we both already had to fix our feet since we both have weird feet that don't fit in boots), but we got out eventually (10:30) and headed for the Golden Staircase. Oh, I also forget that we were greeted by two little bambies with their mom. It was nice to see them around us, they were quite cute :)
Oh, also some very small chipmunk managed to eat through an odor proof bag I had to stash under some rocks (it didn't fit in the 2 ursacks). To this day, unless the odor proof bags are a scam (it was well sealed), I'm still not sure how it found the food. It only took a couple of small bites though, so no biggie.
Note that there is nothing golden about that staircase ;) but we got up it and to a stream dumping into Palisades Lake and snatched the only nice campsite by beating the other hikers who made the mistake of taking a break in the wrong place :)










Day 3: Mather Pass







Day Moving Speed Avg Speed Distance Moving Time Total Time Avg Heart Rate Max HR Total Ascent/Descent Min/Max Elevation Cals
08/12 2.1mph 1.1mph 10.99mi 5H20 9H05 115bpm 145pbm +4382ft/-3907ft 10039ft/12109ft 1363

Luckily, our hike was timed well so that we only had to worry about Mather Pass on the 3rd and not have to do it right after the Golden Staircase like some. It was one of those passes where the grading and the size of steps made it more challenging than it should have been, but since we were already starting from 11,000ft in the morning, it wasn't that bad.
Jennifer was also excited because this is when we started going beyond where she had to turn back last time: new terrain for both of us.





All that pack carrying must have been tiring :)









Day 4: Pincho Pass







Day Moving Speed Avg Speed Distance Moving Time Total Time Avg Heart Rate Max HR Total Ascent/Descent Min/Max Elevation Cals
08/13 2.2mph 1.3mph 11.86mi 5H23 9H30 116bpm 152pbm +3800ft/-4642ft 8474ft/12135ft 1465

Day 4 was Pincho Pass, a mere 30 feet higher than Mather Pass, nothing to see here, move along :)
It was just one of those "go down forever" on dicy terrain. I was actually slower than when going uphill because the weight on my back made it hard to jump those big steps without sliding and falling on the loose gravel, but going down didn't take as much energy. At least, once all the way down, we were rewarded by the suspension bridge, but it also meant we'd have to climb all that back up.
This is also the first night that we entered bear country (as in more numerous and smarted/more motivated bears). Thanks to my GPS, I had a list of all bearboxes in the area. For some reason, everyone stopped/stayed at Dollar Lake and was crowded together with no bear box, and we had a huge camp site at Arrowhead lake with our own private bear box.
Incidently, it's also the night where I heard (but never saw) a bear going around our site, so we locked everything up in the bear box and the bear probably got tired and went to check all the fresh and tasty scouts at Dollar Lake :)









The biggest and nicest bridge on the JMT









Day 5: Glen Pass









Day Moving Speed Avg Speed Distance Moving Time Total Time Avg Heart Rate Max HR Total Ascent/Descent Min/Max Elevation Cals
08/14 2.0mph 1.2mph 10.92mi 5H30 8H28 111bpm 147pbm +4144ft/-3923ft 9478ft/120004ft 1404

Day 5 was Glen Pass, a nice long climb up the face of the mountain, and the terrain continued on top of the ridge for a nice view.
On the other side of the peak, we got to meet the some CCC guys (California Conservation Corp) who were trying to even out some really big and jagged steps.
We again scored huge camp site with bear box that night. It was great to have the GPS and know exactly where to go.














Day 6: Forrester Pass









Day Moving Speed Avg Speed Distance Moving Time Total Time Avg Heart Rate Max HR Total Ascent/Descent Min/Max Elevation Cals
08/15 2.3mph 1.4mph 14.08mi 6H02 9H38 115bpm 149pbm +4604ft/-4377ft 10308ft/13208ft 1727

Day 6 was Forrester Pass, our highest pass yet at 13,120ft. By then, things were definitely getting easier for me due to reduced weight, but poor Jennifer was still lugging the same 25lbs+water. She did a good job getting up though, and on the way, we got to see and touch our first glacier on the way (although what was left of it was fast melting). On top, we met a funny guy who pulled out a budweiser from his pack and lit up a smoke to celebrate his climb: he was doing portion of the trail to Whitney and back as a bet.
On the way down from there, we saw the cutest fluffy furry mouse ever, that thing was to die for :) and we pressed on down to the Valley of Tyndall Creek to make it to the 3rd bear box waypoint I had, and due to some good hiking speeds from poor Jennifer who was suffering from poor digestion of those Pemmican bars (those things are really tough to eat and digest), we made it to our next waypoint and another nice and big camp with bear box (Wallace Creek), although this was the first night we actually had to share the camp site with other folks, but considering that was the only night we had to do so, it really wasn't that bad.









This overgrown ant with wings was carrying that huge worm as food






Top of Forrester Pass







Oh Damn, you're so cute :)



There were lots of old twirled trees, which we found out were twirled by wind over hundreds of years




Day 7: Guitar Lake







Day Moving Speed Avg Speed Distance Moving Time Total Time Avg Heart Rate Max HR Total Ascent/Descent Min/Max Elevation Cals
08/16 2.1mph 1.1mph 08.07mi 3H54 7H15 107bpm 144pbm +4324ft/-2565ft 10262ft/12240ft 1039

After a long hike on Day 6 to make it to the next bear box and not lose 4 miles by stopping at the previous one, day 7 was a nice and easy hike to Guitar Lake where most people stop overnight before climbing Whitney the next day.
This one of the days where Garmin selling 24K topo data version 3 that just came out, showed that they are still using data that is 15 to 20 years old in point. The JMT has been rerouted in several places, and the GPS was still showing a very old and obsolete route. Bad Garmin!
We stopped at the Crabtree ranger station on the way to get some wag bags (their container was empty) and chat with the ranger there, and got to Guitar Lake quite early. Jennifer and I agreed that we should just fill up on water (we had 8-9l carrying capacity) and continue on to a dry camp 600ft higher 1.5 miles further, putting us closer to the peak for the next morning, and giving us a nice quiet spot just for us.
We still had time left over to lounge around for the first time. It was quite nice to do so for our first time :)





Guitar Lake was indeed shaped like a Guitar (see the upper right of the picture)



There were no trees to tie the ursacks to, but I found some fused rocks that I was able to use as an anchor point



Nice and quiet, and great sunset




Day 8: Mt Whitney











Day Moving Speed Avg Speed Distance Moving Time Total Time Avg Heart Rate Max HR Total Ascent/Descent Min/Max Elevation Cals
08/17 2.1mph 1.4mph 14.10mi 5H35 9H49 115bpm 147pbm +4453ft/-7468ft 8366ft/14514ft 1532

Day 8 ended up being our last day. We got up at 6, and were on the trail by 08:00. That said, by then already 10 people had passed our position. Some got up as early at 04:30 and started in the dark...
Either way, it's not like it was a race, we got up with plenty of time to spare. At the trail junction around 13,000ft, we dropped our packs and I started going up pretty fast without all that weight on my back. I had to turn around and make sure I wasn't leaving Jennifer too far behind :)
As the average heart rate per day trend showed, my body had been getting used to both the altitude and the exercise, so climbing what was left of Whitney when I only had my fanny pack and some water, was a true piece of cake.
After a lunch at the top and some pictures, Jennifer and I started heading down. My GPS made it clear that by having left the top around noon, we would make it to the exit that day, so that helped us getting down at a good pace. We were happy to reach trail camp after 3 miles of switchbacks downhill though because our 8 litres of water from the previous day were almost gone (with the dry camping and the total absence of water).
A few hours, and many many switchbacks later, we made it to the bottom and I was able to get a couple of bars on my cell phone so that our driver from Lonepine had started coming up and met us at the trailhead 18:00 to get us back to Bishop. By 20:30, we were showered with fresh clothes and enjoying Sushi in Bishop. That was quite nice :)





One of 'dem crazy trailrunners :)



The little hut at the top of Whitney









11 miles of switchbacks down





Finally, we made it to the end!




Conclusion


It was nice to finish the hike, I know Jennifer was ecstatic to have finished the trail she started and despite some problems digesting the food we had, and feet issues (same for me, my two little toes got pretty badly mushed due to my feet being too wide, even for wide boots), we did pretty well on the trail.
She lost a couple of pounds, I lost 4 to 5 (although I'm regaining them quickly :) ), and we were happy to make it back to civilization with lots of pictures and the experience of this long trip.
For the rest, you can look at all the pictures of this hike from the John Muir Trail from Bishop to Mt Whitney
2007/08/08 New Computers & OS
π 2007-08-08 11:39 by Merlin in Linux

After many years with an old desktop machine (AMD K7 900Mhz engineering sample), I had to admit that my workstation needed an upgrade.
Similarly, my old trusty T42p laptop has not liked travelling too much and the last time I got it fixed at work, I was told it was the last time :)
Since I had just upgraded my ancient original Pentium2 Dual Xeon 450Mhz server (gargamel) last year to a more acceptable Dual P4 Xeon 2.4GHz Hyperthreading, it was time to do my workstation and laptop this time.

For the workstation, I pieced up and built a brand new up to date machine: Dual Core Duo E6850 3GHz with Asus board, and giant tower with 11U, and 12-14 drives.

For the laptop, I got a Thinkpad Z61p: Dual Core Duo T7200 2Ghz with 1920x1200 resolution. The LCD is unfortunately a bit smaller than my T42p, but the pixels are still quite readable for me.

As for the OS, I'm currently switching from an almost 10 year old hand configured/upgraded debian distribution (with a fair amount of upgrade cruft and bugglets) to Ubuntu Fiesty. I'm currently forcing myself to use the default gnome, at least long enough to see what I've been missing, if anything, and whether I can put up with it (the lack of edge scrolling, and pitiful iconbox compared to enlightenment is already annoying me). But eh, it's a learning experience and lets me start from a clean system. Once every 10 years isn't too bad compared to windows (which I had to re-install after being unable to migrate it from my older desktop)

For comparison purposes, here are performance comparison numbers between my old and new new server, laptop, and workstation (doing a kernel build with multiple levels of parallelization (-j))
The new server is almost 20 times faster than my 10 year old server:
Saroumane: Old Server/AMD K6 350Mhz
make -j2
real    488m54.485s
user    431m33.470s
sys     47m49.770s
gargamel: New Server/Dual P4 Xeon 2.4GHz Hyperthreading
make -j4
real    32m31.021s
user    87m58.847s
sys     9m22.060s
make -j2
real    39m36.286s
user    71m30.346s
sys     7m59.697s
no make -j
real    55m19.415s
user    51m24.697s
sys     6m23.695s


The new laptop is 2.5 times faster than the old one, although it'll be a lot more responsive than the old one with the second CPU core:
gandalfthewhite: Old Laptop/Thinkpad T42p/Pentium M 1.80GHz
make -j4
real    38m28.071s
user    33m58.057s
sys     2m34.672s
no make -j
real    38m24.379s
user    33m52.404s
sys     2m32.313s
gandalf: New Laptop/Thinkpad Z61p/Dual Core Duo T7200 2Ghz
make -j4
real    15m54.407s
user    27m49.496s
sys     3m2.067s
make -j2
real    16m11.416s
user    27m26.711s
sys     2m39.974s
no make -j
real    29m9.874s
user    27m16.194s
sys     2m36.370s



That said, the winner is my new workstation, top of the line of current CPU and memory speed (800Mhz DDR2, ok, DDR3 was 3 times the price, which is a bit much). What's nice is that it actually beats gargamel, my 2.4Ghz dual CPU server by a factor of 3. Impressive!
Of course, the best part is that least 15 times faster than my old workstation. I guess the old was, was old :)
moremagic: New Workstation/Dual Core Duo E6850 3GHz
make -j4
real    10m20.318s
user    18m23.385s
sys     1m35.437s
make -j2
real    10m17.382s
user    18m4.710s
sys     1m31.256s
poltron: Old Workstation/AMD K7 900Mhz
make -j2
real    155m13.288s
user    134m36.377s
sys     18m47.572s



The rest is a benchmark of two SATA boards (Silicon Image 3124 vs 3132) through a port multiplier on the faster workstation (moremagic) vs the server (gargamel). Reading speed is 150MB/s and writing speed 120MB/s in raid5 configuration in the fastest setup. Not to shabby :) (it would likely be faster without the port multipliers, but eh, who has 14 sata ports in his workstation? :) )
Setup: 10 drives on 2 5 port PMPs
3.0 Gbps to PMP, 1.5 Gbps to drives
Theory: 375MB/s per PMP/5 drives, or 750MB/s for 2 PMPs/10 drives
Sil 3132:
Out:
moremagic:/mnt/mnt# time dd if=/dev/zero of=zero bs=1M count=10240
10737418240 bytes (11 GB) copied, 89.1388 seconds, 120 MB/s
In:
moremagic:/mnt/mnt# time dd if=zero of=/dev/null bs=1M count=10240
10737418240 bytes (11 GB) copied, 71.5164 seconds, 150 MB/s
Version  1.03       ------Sequential Output------ --Sequential Input- --Random-
                    -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  /sec %CP
moremagic.svh.me 4G 68699  95 116140  28 65026  14 72305  91 145511  17 503.0   0
                    ------Sequential Create------ --------Random Create--------
                    -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
                 16  5704  94 +++++ +++ +++++ +++  6342  99 +++++ +++ 21178 100
Sil 3124:
Out:
moremagic:/mnt/mnt# time dd of=zero if=/dev/zero bs=1M count=10240
10737418240 bytes (11 GB) copied, 147.033 seconds, 73.0 MB/s
In:
moremagic:/mnt/mnt# time dd if=zero of=/dev/null bs=1M count=10240
10737418240 bytes (11 GB) copied, 102.07 seconds, 105 MB/s
Version  1.03       ------Sequential Output------ --Sequential Input- --Random-
                    -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  /sec %CP
moremagic.svh.me 4G 65831  93 72588  18 42041   9 74446  93 102407  12 485.8   0
                    ------Sequential Create------ --------Random Create--------
                    -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
                 16  5508  90 +++++ +++ +++++ +++  6319  99 +++++ +++ 21339 100
Sil 3124 on a Dual P4 Xeon 2.4GHz w/Hyperthreading and just 5 drives on one PMP
gargamel:/mnt/dshelf2# time dd of=zero if=/dev/zero bs=1M count=10240
10737418240 bytes (11 GB) copied, 121.61 seconds, 88.3 MB/s
gargamel:/mnt/dshelf2# time dd if=zero of=/dev/null bs=1M count=10240
10737418240 bytes (11 GB) copied, 126.053 seconds, 85.2 MB/s
Version  1.03       ------Sequential Output------ --Sequential Input- --Random-
                    -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  /sec %CP
gargamel.svh.mer 2G 28435  98 90672  78 31061  23 29877  85 94750  31 365.5   2
                    ------Sequential Create------ --------Random Create--------
                    -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
                 16 29058  90 +++++ +++ 32252  99 32538 100 +++++ +++ 27919  87

More pages: July 2018 June 2018 May 2018 April 2018 March 2018 February 2018 January 2018 December 2017 November 2017 October 2017 September 2017 August 2017 July 2017 June 2017 May 2017 April 2017 March 2017 February 2017 January 2017 December 2016 November 2016 October 2016 September 2016 August 2016 July 2016 June 2016 May 2016 April 2016 March 2016 February 2016 January 2016 December 2015 November 2015 October 2015 September 2015 August 2015 July 2015 June 2015 May 2015 April 2015 March 2015 February 2015 January 2015 December 2014 November 2014 October 2014 September 2014 August 2014 July 2014 June 2014 May 2014 April 2014 March 2014 February 2014 January 2014 December 2013 November 2013 October 2013 September 2013 August 2013 July 2013 June 2013 May 2013 April 2013 March 2013 February 2013 January 2013 December 2012 November 2012 October 2012 September 2012 August 2012 July 2012 June 2012 May 2012 April 2012 March 2012 February 2012 January 2012 December 2011 November 2011 October 2011 September 2011 August 2011 July 2011 June 2011 May 2011 April 2011 March 2011 February 2011 January 2011 December 2010 November 2010 October 2010 September 2010 August 2010 July 2010 June 2010 May 2010 April 2010 March 2010 February 2010 January 2010 December 2009 November 2009 October 2009 September 2009 August 2009 July 2009 June 2009 May 2009 April 2009 March 2009 February 2009 January 2009 December 2008 November 2008 October 2008 September 2008 August 2008 July 2008 June 2008 May 2008 April 2008 March 2008 February 2008 January 2008 December 2007 November 2007 October 2007 September 2007 August 2007 July 2007 June 2007 May 2007 April 2007 March 2007 February 2007 January 2007 December 2006 November 2006 October 2006 September 2006 August 2006 July 2006 June 2006 May 2006 April 2006 March 2006 February 2006 January 2006 December 2005 November 2005 October 2005 September 2005 August 2005 July 2005 June 2005 May 2005 April 2005 March 2005 February 2005 January 2005 December 2004 November 2004 October 2004 September 2004 August 2004 July 2004 June 2004 May 2004 April 2004 March 2004 February 2004 January 2004 October 2003 August 2003 July 2003 May 2003 April 2003 March 2003 January 2003 November 2002 October 2002 July 2002 May 2002 April 2002 March 2002 February 2002 November 2001 October 2001 September 2001 August 2001 July 2001 June 2001 May 2001 April 2001 March 2001 February 2001 January 2001 December 2000 November 2000 October 2000 September 2000 August 2000 July 2000 June 2000 April 1999 March 1999 September 1997 August 1997 July 1996 September 1993 July 1991 December 1988 December 1985 January 1980