shokunin

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Everything posted by shokunin

  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. Hi all, I'm trying to analyze how my usage patterns queue depth looks like, is Perfmon an accurate guide to monitor average queue depths on one of my physical disks? It doesn't seem to be correct as when I'm doing some heavy par'ing or other video work the queue depth ranges from 60-300+ (12 x WD4000YR on Areca Raid 6) which is way off the charts of other benchmarks looking at queue depths of 8, 16, 32 etc... Thanks Glenn
  15. 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
  16. 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+.
  17. shokunin

    Next Generation Raptor?

    The gamer / server versions are probably just differnet TLER firmware settings, just like the WD4000-KD vs WD4000-YR.
  18. Well there are different ways to connect a large array, if you want to do it externally via SATA your choices are to wait for Serial Attached SCSI and use their SATA compatibility to create a large array, or use current SATA raid cards that have infiniband (multi-lane) connectors to allow for external arrays. You could also convert internal sata ports into external shielded infiniband ports by using an adapter such as this: Infiniband Connector The limitation here is that each cable is limited to 4 sata Lanes, so you can only hookup 4 sata drives (assuming no port multipliers) on one infiniband cable. THe other choice is to simply use newer shielded SATA cables and run them from one case directly into the other. Just be careful in moving the cases. What type of raid are you planning, is this just JBOD. Have you thought about backup strategies as well..
  19. shokunin

    RAID5 vs RAID50 on 3Ware

    Actually, he's right. Raid 50 is an array of Raid 5's Striped. So in a 6 drive array, there would be 2 Raid 5 (3 disks each) that are striped together. Same logic holds true for Raid 10 which is a group of mirrored arrays that are striped, imagine 3 raid 1 arrays striped. Raid 01 would be an arary of Raid 0's mirrored. Even in a 10 drive raid 01, lose 1 disk and half the array is crippled. Lose 1 disk in Raid 10 and only 1 mirror needs to be rebuilt.
  20. LTO-3 drives and tape are far more expensive than LTO-2. Eventually when LTO-4 arrives, then I'd figure LTO-3 drives will become cheaper as well as the tapes. In the end, cost was the major factor as dropping down $$$ for Ultrium LTO-2 plus 50 or so LTO-2 tapes was about all I really wanted to spend. LTO3 would have been nice at 400gb native, but it would end up costing nearly twice as much.
  21. I use LTO-2 200gb native / 400GB compressed tapes for backing up a 4+ TB array. Tape costs can vary widely, but fleabay has some good deals on new tapes once in awhile. I hand feed my Ultrium drive as a used autoloader seemed like it'd be more problematic in the long run. For home use it's not a big deal to not have an autoloader, for a business, I don't see how I'd be able to consistently do backups without an autoloader.
  22. shokunin

    Upgrade Fileserver (for Homeuse)

    The two cougtek recommended, along with the Broadcom BC series and Highpoint (gasp) can actually provide fast writes at the expense of CPU overhead to calculate XOR. The new Promise EX card seems to be decent too. I use an Areca 1260 16 port card in Raid 6. Even with Raid 6 I still backup to an Ultrium LTO-2 Tape drive. Raid provides availability with minimal loss of downtime. However, in most home uses, availability isn't all that important. There's an extensive comparison of a 6-8 Raid cards over at Tweakers.net. Although it's a dutch site, that particular article is also listed in english.
  23. shokunin

    OS and Programs on seperate drives

    I use to have my system drives separated like: Drive 1: OS and misc stuff Drive 2: Programs and misc stuff Drive 3: Data Drive 4: Data When I reinstalled my system I removed drive 2 (both 15K SCSI) and installed both OS and Apps on Drive 1. I could not tell the difference. Now most of my apps are not games, rather graphics and media applications where having 2 data drives one to read the data from and one to write the data to created far more gains than having my OS and Apps separated. Not to mention it was less of hassle always remembering to change the path to my D: drive whenever I installed something. I did end up using drive 2 as a photoshop scratch disk as well storing other misc stuff on it.
  24. shokunin

    Upgrade Fileserver (for Homeuse)

    Keep in mind that is all RAID 5 will give you, that is protection from a SINGLE drive failure. However, there are many other ways to still lose that data, user error dropping or reinitializing the array, one drive accidentally dropping off the array for whatever reason (power, loose connectors, etc), virus, bad PSU, and on and on. I have lost raid 5 arrays due to hardware and user error by my trigger-happy fingers. If the data is really important there is no subsitute for backup... tape, optical, or another HD.
  25. On the intel side, supermicro also has some boards with PCI-e and PCI-x w/ the 955x chipset (non-SLI) Supermicro PDSGE It may be cheaper to sell your PCI-x raid card and get a PCI-e one (areca, promise, lsi logic, etc) I have not seen an X2 capable AMD board with both PCI-X and PCI-e. Others have already mentioned Opteron boards that do have that bandwidth.