shokunin

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About shokunin

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    <a href='/patron.html'><b>StorageReview Patron</b></a>
  1. shokunin

    SAS over SCSI?

    note that an SATA cable cannot and will not fit onto a SAS drive. But a SATA drive will fit into a SAS connector or cable.
  2. shokunin

    File server processor

    I agree. I have a couple of file servers using Pentium M Dothan chips using Intel's 855 and 915 chipsets. The fileservers with one hard drive will idle at about 35-38 watts at the wall using Kill-a-watt meter. One of them has about 10 hard drives and when completely spun down, idles around 45-50w. Same hard drives and ram in an Gateway Celeron 2.8ghz machine idled at 90w with drives spun down 100w.
  3. shokunin

    Which SAS Raid Card is better?

    I wonder why supermicro doesn't advertise their opteron boards on their main site? sm link it's an OEM board and thus not listed under the regular menu. they are now releasing some new duals and quads with pci-e and pci-x.
  4. shokunin

    Which SAS Raid Card is better?

    shokunin, What motherboard are you using? I was using a Asus A8N32-SLI with my 4805SAS, but could never get the system stable. Supermicro H8DCE it has dual everything (almost). Dual opteron, dual nForce chipsets so it has 2 full 16x PCI-e slots, and 2 8x PCI-e slots (4x lanes connected, 8x physical slot) and 3 good ol' PCI slots. Dual Lan, Dual NVRAID (from 2 chipsets) etc... I have an Areca ARC-1260 in one 16x PCI-e slot, and the Adaptec card in an 8x slot. Boot takes forever initializing the raid controllers, especially the 4805, but after that the dual, dual-core opterons are blazin and aren't bottlenecked by storage .
  5. shokunin

    Which SAS Raid Card is better?

    There aren't too many of them out. HP P600, LSI Logic, and Adaptec are the only ones that I'm aware of that have been released. There's a broadcom one supposedly on it's way as well. I have an Adaptec 4805SAS and at first it wasn't running too well, but it was running an old firmware, updated to the latest and it runs pretty fast. Just using an 8 Fujitsu MAU's in raid 10. I run my vmware sessions off the array as well oracle 9i and it seems quite fast. Have not had time to run any benches on it but now that it's loaded with apps, I probably won't have time to do so.
  6. shokunin

    Tips about a poor-performing scsi raid 0

    Slacker, In the bios, there should be a display that shows all the SCSI channels and you'll see a bunch of empty ID's but the 2 drives should be in there somewhere. You should be able to identify the "speed" of the bus by U160, or UW, SCSI2, SCSI3, etc. Hopefully your drives are in LVD or U160 mode. If not then change it to U160. If you can't change it, then it's possible that you have a bad cable or improperly terminated cable. Your SCSI cable should be "terminated" aka there should be a small plastic box or device at the end of the cable... I've not used the XPcache filter but the link is still alive in the thread below (not the 1st hyperlink, but the second one) http://forums.storagereview.net/index.php?showtopic=11702
  7. shokunin

    SATA drives for a server

    The controller doesn't need to understand TLER, the drives do. The raid controllers will timeout a drive and flag it as being dropped or offline if it does not respond within a certain window. drives without TLER supposedly go unresponsive during error recovery and the raid controller gets degraded when in fact it's fine. I've seen this sort of behavior on other drives (maxtor) yet could not explain it. TLER sort of explains what could be happending with some controllers dropping drives randomly if they are not responding while in error recovery. If the error cannot be recovered, the parity from the raid set should be able to recreate the block.
  8. shokunin

    SATA drives for a server

    I'm using a dozen WD4000yr in my media server 24/7 without any problems or issues. They run cool and are quite fast. I'm using an Areca raid controller though. I also have 4 7k500's that have performed well without any issues. Keep the drives cool, I'd opt for the RE2 WD4000yr for it's warranty and raid performance.
  9. shokunin

    Tips about a poor-performing scsi raid 0

    I've had the 4 port version, enterprise 1600 quad channel in a 64/66mhz slot running 4 36gb MAS drives in raid 10 with much greater results than what you're posting. I never tried in a 32bit/33mhz slot though... The 1600 had a number of options that either made it dog slow or a good performer. Make sure each of your drives are initiated in the proper termination (LVD 160) and that nothing is forcing the drives to perform at lower bus speeds. Enable Write back cache, adaptive read ahead, and few other options I was able to tweak the 1600 to where it performed well.
  10. shokunin

    Adaptec 4805SAS on ASUS A8N32-SLI

    I just got one of these for testing... it's okay at best so far. I got a bum cable so right now I'm only testing 4 (have 8) fujitsu 36gb MAU's SAS drives in Raid 0 as well as raid 10. It's a Long card, my AMD motherboard has two full PCI-e 16x lanes and two 4x lanes w/ 8x physical connectors. I have an areca card in one the 16x slots and this is in one of the 4x slots (8x connector). I would put it in one of the 16x slots but it one of the opteron coolers is in the way. Just for kicks I initialized a 4 drive raid 0, sustained transfers seem to max out at around 120mb/sec still testing, but I hope this card gets better... then again, the only time I actually had good performance from an Adaptec card were the old trusty 2940uw and 29160/39160 cards.
  11. shokunin

    Areca 1210 in the UK - Chenbro rebranded?

    www.webconnexxion.com is probably your best bet...
  12. shokunin

    Adaptec 4805SAS on ASUS A8N32-SLI

    Sounds good, let us know some benches. Are you using SATA Only or do you have any SAS drives?
  13. I use an HP Ultrium LTO-2 manual load tape drive with a Adaptec PCI scsi ard. Although the card is a 64bit 66mhz PCI-X card, it works just fine in my PCI slot. The only non-raid SCSI PCI-e controller that I'm aware of is the Atto UL5D, but it's PCI-e 4x lanes and not 1x. I backup on my home network about 7TB and just make sure you have plenty of LTO-2 tapes, at least twice your storage needs (1 current backup, 1 prior backup, and incrementals).
  14. shokunin

    How to monitor average queue depth?

    Hi Eugene, Interesting, so when I switch to report mode, I'm basically all under 1 queue? it ranges .3 to 3.8 is that correct? can you have a queue depth greater than zero but less and one? Please excuse my ignorance on disk monitoring but am trying to determine what is my usage pattern and what disk strategy would benefit me most. Thanks. Glenn
  15. shokunin

    How to monitor average queue depth?

    Looks like I was using the wrong metric, I was using avg. queue length instead of current disk queue length. If I use current disk queue length on my raid array it zig zags between 16-40+.