Intel Gen2 SSD issues

Discussion in 'Mac Pro' started by dubaimac, Dec 1, 2009.

  1. dubaimac macrumors regular

    Joined:
    Jun 26, 2009
    #1
    Afternoon all,

    twice in the last week I have had to repair disk from booting from my OSX DVD, file counts and directory counts have been off by one , causing a massive slow down and freezing, I have 2 of the Gen2 SSD's in Raid 0, can anyone point me in the direction of why this may be happening is it hardware or software issue? Anything I can do to diagnose the route of this problem?

    Thanks in advance
     
  2. gugucom macrumors 68020

    gugucom

    Joined:
    May 21, 2009
    Location:
    Munich, Germany
    #2
    There is another thread here on the forum. I had problems since I was running 10.6.2 and decided to go back to 10.6.1. Since then no problem. No other details known at this time.
     
  3. smacman macrumors 6502

    Joined:
    Feb 7, 2006
    #3
    So far so good on 10.6.2 with my 160GB G2 but no RAID0 here. Seems like the problem is somehow linked to RAID.
     
  4. nanofrog macrumors G4

    Joined:
    May 6, 2008
    #4
    10.6.2 doesn't do well with hardware RAID controllers. I'd have thought it wouldn't be the case with their own software implementation in OS X.

    I guess the OP could check if there's posts on the firmware having issues with RAID just in case it's more than OS X's software implementation (it does happen, but typically with a card).
     
  5. dubaimac thread starter macrumors regular

    Joined:
    Jun 26, 2009
    #5
    Thanks guys, I'm going to spend some time on searching firmware, raid, mac, osx, gen2 etc. today, if you here anything else or any other ideas please let me know
     
  6. dubaimac thread starter macrumors regular

    Joined:
    Jun 26, 2009
    #6
    Well its only been 5 hours, but I think the new firmware has fixed the problem, I'm monitoring it closely, running verify every few hours to see if it comes back, nothing yet!!!!!
     
  7. Transporteur macrumors 68030

    Joined:
    Nov 30, 2008
    Location:
    UK
    #7
    What exactly does the new firmware to the drive?

    I know that the sequential writing speeds have been increased, but what else?
    Automatic trimming?
     
  8. dubaimac thread starter macrumors regular

    Joined:
    Jun 26, 2009
    #8
    I'm not exactly sure, but here is the xbench

    Results 371.65
    System Info
    Xbench Version 1.3
    System Version 10.6.2 (10C540)
    Physical RAM 8192 MB
    Model MacPro4,1
    Drive Type MacPro SSD
    Disk Test 371.65
    Sequential 262.59
    Uncached Write 182.98 112.35 MB/sec [4K blocks]
    Uncached Write 265.03 149.95 MB/sec [256K blocks]
    Uncached Read 207.20 60.64 MB/sec [4K blocks]
    Uncached Read 855.90 430.17 MB/sec [256K blocks]
    Random 635.67
    Uncached Write 520.98 55.15 MB/sec [4K blocks]
    Uncached Write 291.18 93.22 MB/sec [256K blocks]
    Uncached Read 2619.05 18.56 MB/sec [4K blocks]
    Uncached Read 1795.48 333.16 MB/sec [256K blocks]
     
  9. Cynicalone macrumors 68040

    Cynicalone

    Joined:
    Jul 9, 2008
    Location:
    Okie land
    #9
    I don't know if this is related but...

    Since updating to 10.6.2 my RAID 1 mirror has been having all kinds of problems. It ran great for about a month, now I get Kernel Panic's and severe slowdown. After reading this thread I booted from an external backup and looked at each drive. They are no longer synced which is probably why OS X is having so many problems.

    I'm using the Apple RAID card in an 09 Mac Pro. You would think this would work well with 10.6.2. :rolleyes:
     
  10. nanofrog macrumors G4

    Joined:
    May 6, 2008
    #10
    10.6.2 doesn't play well with RAID cards it seems. :rolleyes: :(
     
  11. dubaimac thread starter macrumors regular

    Joined:
    Jun 26, 2009
    #11
    Things got so bad with my Raid 0 with 2 x Gen2 Intel SSD running 10.6.2 that I trashed the raid last night, did a fresh install on just one of the ssd's, and so far no problems, in fact the system seems just as quick, no delays in system preferences or disk utility, all running much better.

    I might consider putting the raid back together, if it seems that 10.6.3 fixes whatever issue there was.

    Anyone else anything to report on this?
     
  12. VirtualRain macrumors 603

    VirtualRain

    Joined:
    Aug 1, 2008
    Location:
    Vancouver, BC
    #12
    What symptoms were you seeing exactly, and how did you isolate it to the drives/RAID?
     
  13. gugucom macrumors 68020

    gugucom

    Joined:
    May 21, 2009
    Location:
    Munich, Germany
    #13
    I have two 80 GB Gen2 running on an Arc-1210 in Raid0. Three days ago I realized that disk utility would not let me repair permissions on the Raid partition. I had to clone to HDD, repair permissions and clone back to SSD array. Afterwards the permission repair wasn't greyed out any more. I have not had a repeat of this problem since but I do not sleep or shut down my MP4,1.
     
  14. dubaimac thread starter macrumors regular

    Joined:
    Jun 26, 2009
    #14
    symptoms varied, for example it would take 4.4 minutes for disk utility to spin up if at all, printing to pdf would take 3 minutes to spin up, then intermittent beachball, system preferences would hang every second or third attempt, clicking menus would have a lag of some sort, and then a restart using sl disk would show disk errors, it would repair and they would come back in a few hours, sometimes a restart would delay the inevitable boot from sl disk.

    15 hours in no restart disk utility spins up in under 2 seconds, no errors, and pdf printing is fixed. Seems to be specifically a RAID0 with Gen2 SDD's that have a problem, my WDC BLACK RAID0 is flawless.
     
  15. nanofrog macrumors G4

    Joined:
    May 6, 2008
    #15
    10.6.2 seems to have issues with RAID, in both SSD on the logic board, and with RAID cards, including Apple's own card it seems. :(

    You could roll it back to 10.6.1, or wait for 10.6.3, and see if it's fixed in that update.
     
  16. VirtualRain macrumors 603

    VirtualRain

    Joined:
    Aug 1, 2008
    Location:
    Vancouver, BC
    #16
    Oddly, I have Gen1 Intel's using SW RAID0 and don't have any of these symptoms on 10.6.2... there's something funny going on with G2 drives though and RAID cards?
     
  17. nanofrog macrumors G4

    Joined:
    May 6, 2008
    #17
    I wasn't aware of the G1's having any immunity. Most of the information I've spent time on, is with cards. But I did recall some G2 owners reporting issues, and IIRC, even a person or two with mechanical on the logic board in a software RAID.
     

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