Jeff Poulin

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About Jeff Poulin

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  1. I think drives used to be a big bottleneck up until 5-10 years ago. When ATA drives (and later SATA drives) became much faster and UDMA became the norm, the difference between ATA and SCSI for desktop use started to diminish. Nowadays with big/fast/cheap drives and 2-4GB of RAM on many desktops, drive speed is even less of a factor. With enough RAM, almost everything becomes read cached in short order. Drive speed is still important for write intensive applications or in servers where random I/O is the norm, but outside of that, it's getting harder to justify big investments in drives because the return on investment just isn't what it used to be.
  2. Nice stats! Too bad it wasn't around a year ago when I was looking to buy faster drives. I don't know how well it's going to sell at $1/gig though. Seems a bit steep when much larger drives are going for considerably less and are quite good performers in their own right. Still, it's nice to see WD making improvements to the Raptor line after all these years.
  3. You fool! You could have run two 40-drive RAID0 arrays!!! (just kidding, of course) Nice to know the Raptors held up as well as they did. That was an impressively powerful server you built in 2005. What did you replace it with?
  4. It's a long-shot, but have you tried putting the controller card in another slot? If that doesn't work, try disabling the SATA ports in the bios. Kind of a funny board to use with SCSI, though.
  5. You need to install the LSI SCSI driver in the operating system. Did the controller card come with a driver disk?
  6. Jeff Poulin

    lsilogic pcie scsi hba

    I didn't forget about this thread. My controller card got held up in customs, so it arrived a little late. It's installed now and I ran a few benchmarks. First, the setup: the computer is a dell poweredge with a xeon 3060 CPU, 4GB RAM, running 32-bit debian linux (I plan to test it in 64-bit linux later). It's running kernel 2.6.18 (old, I know, but it's the one that comes with debian stable). There are 4 SCSI drives: a 147GB Maxtor Atlas 15K II on it's own U160 controller, and three 300GB Maxtor Atlas 10K 5 drives on the LSI controller. The controller is in an X8 PCIe slot. I put the 3 10K drives in software RAID0 to test the throughput of the controller card. By themselves, each drive has the following read rate: # hdparm -t /dev/sd[bcd] /dev/sdb: Timing buffered disk reads: 256 MB in 3.02 seconds = 84.72 MB/sec /dev/sdc: Timing buffered disk reads: 256 MB in 3.02 seconds = 84.83 MB/sec /dev/sdd: Timing buffered disk reads: 256 MB in 3.02 seconds = 84.65 MB/sec Here's a speed test reading 8GB from the raw RAID0 device: # dd if=/dev/md0 of=/dev/null bs=1048576 count=8192 8192+0 records in 8192+0 records out 8589934592 bytes (8.6 GB) copied, 35.6257 seconds, 241 MB/s And here is how fast it can write 8GB to the device: # dd if=/dev/zero of=/dev/md0 bs=1048576 count=8192 8192+0 records in 8192+0 records out 8589934592 bytes (8.6 GB) copied, 54.5497 seconds, 157 MB/s So the individual drives get about 84MB/sec sequential reads on the outer zone and 241MB/sec when in RAID0. That's an efficiency of about 96%. More importantly, it shows the card is capable of sustaining a transfer of at least 241MB/sec over 8GB.
  7. Jeff Poulin

    Seagate Prices up?

    Maybe it's because there's a big holiday coming up. In about 19 days, the prices should start to come down.
  8. Jeff Poulin

    lsilogic pcie scsi hba

    I went ahead and ordered the LSI20320IE. It's arriving by international mail, so it'll take a couple weeks to get here. When it does, I'll report back on how well it performs. This will be for a linux workstation, though, so I won't be able to comment on Windows driver performance.
  9. It should detect it just fine. LSI chipsets have had drivers in the linux kernel for years. That card uses the 53c1020 chipset, I believe. I used to run my linux systems with their older 53c1010 chipset (U160) and they ran fine.
  10. Jeff Poulin

    lsilogic pcie scsi hba

    I haven't been able to find any reviews either, but it's an interesting card. I'm in a similar situation. I have a 147GB Atlas 15K II and 300GB Atlas 10K V in my workstation running off an old Adaptec 29160 in a 32-bit PCI slot. I looked at the 29320lpe, but one thing I didn't like about it is that it's a 1x card, so it maxes out at 250MB/s. I know my drives aren't pushing that kind of bandwidth now, but if I add more, I could conceivably get that high. If I spend that much to buy a 320MB/s card, I want to get a 320MB/s limit. Otherwise, it's like running a 160MB/s card with a 32-bit PCI slot. The 4x LSILogic card would give me the maximum rated bandwidth, but unfortunately, I can't find any around here (France).
  11. Jeff Poulin

    WD3200KS-00PFB0 WANTED PLEASE

    I'm in France. I think the shipping to Australia would be prohibitively expensive since international postal rates are very high here. Also, I should apologize as my comment wasn't intended to offer one of my drives for sale. I was just pointing out that this revision number appears to be common so you should have no difficulty finding one locally. In the worst case, you could find one from the U.S. which has relatively cheap international shipping fares. Dave Bell's e-bay link might be a good start if you go that route.
  12. I'm not familiar with ATTO, but the HD Tach scores are about right. You seem to be conflating the interface speed of SAS with the hard drive speed. They're not the same.
  13. Jeff Poulin

    WD3200KS-00PFB0 WANTED PLEASE

    I have two WD3200KS-00PFB0 drives in my system as well. Fortunately for you, it appears these are a common revision number.
  14. Jeff Poulin

    WOW storage review site is alive again!

    Nice to see this place coming back to life again. 4 articles in the last week! Thanks, Eugene.
  15. Jeff Poulin

    Last update for WD1500ADFD

    What's the difference in the firmware? More importantly, when are they going to release a 300GB SATA2 version? The 1500ADFD is 1.5 yrs old now, and it's getting harder to justify buying such an old model for a new system.