Fusion drive has died... Now what?

Discussion in 'iMac' started by dilgit, Mar 23, 2013.

  1. dilgit macrumors regular

    Joined:
    Sep 24, 2010
    #1
    OK. So my 3TB Fusion drive has stopped responding on my iMac 27" late 2012(details below). I reinstalled ML 10.8.3 on my external 2TB WD USB 3 drive, and I boot from there. It works just fine but not as fast as with SSD drive. Also installed Parallels 8 and Windows 7 Home Premium.
    When I open Disk Utility, I see the Fusion drive grayed out. It's impossible to perform anything on that drive: partition/format - NOTHING!! When I open system report, and serial-ATA I see the Fusion drive, divided to the Samsung 128GB SSD drive(BSD Name: disk 2), and the 3TB HD drive(BSD Name: disk 0).

    My question is: How can I format the Fusion drive so that I can reinstall ML on it once again?
     
  2. Gav2k macrumors G3

    Gav2k

    Joined:
    Jul 24, 2009
    #2
    You don't there is a hardware issue contact apple ;)
     
  3. dilgit thread starter macrumors regular

    Joined:
    Sep 24, 2010
    #3
    When I hit the "verify disk" in Disk Utilities I get the following details:

    Verifying partition map for “APPLE HDD ST3000DM001 Media”
    Checking prerequisites
    Checking the partition list
    Checking for an EFI system partition
    Checking the EFI system partition’s size
    Checking the EFI system partition’s file system
    Checking all HFS data partition loader spaces
    Checking Core Storage Physical Volume partitions
    Checking storage system
    Checking volume.
    disk2s2: Scan for Volume Headers
    disk0s2: Scan for Volume Headers
    disk2s2: Scan for Disk Labels
    disk0s2: Scan for Disk Labels
    Logical Volume Group 924F52D2-E4E5-4C1B-AADC-BAB5663C9BE2 spans 2 devices
    disk2s2+disk0s2: Scan for Metadata Volume
    Logical Volume Group has a 4482 MB Metadata Volume with double redundancy
    Start scanning metadata for a valid checkpoint
    Load and verify Segment Headers
    Load and verify Checkpoint Payload
    Load and verify Transaction Segment
    Incorporate 0 newer non-checkpoint transactions
    Load and verify Virtual Address Table
    Load and verify Segment Usage Table
    Load and verify Metadata Superblock
    Load and verify Logical Volumes B-Trees
    Logical Volume Group contains 0 Logical Volumes
    Load and verify Freespace Summary
    Load and verify Block Accounting
    Load and verify Live Virtual Addresses
    Newest transaction commit checkpoint is valid
    Load and verify Segment Cleaning
    The volume 924F52D2-E4E5-4C1B-AADC-BAB5663C9BE2 appears to be OK.
    The partition map appears to be OK

    Verifying partition map for “APPLE SSD SM128E Media”
    Checking prerequisites
    Checking the partition list
    Checking for an EFI system partition
    Checking the EFI system partition’s size
    Checking the EFI system partition’s file system
    Checking all HFS data partition loader spaces
    Checking Core Storage Physical Volume partitions
    Checking storage system
    Checking volume.
    disk2s2: Scan for Volume Headers
    disk0s2: Scan for Volume Headers
    disk2s2: Scan for Disk Labels
    disk0s2: Scan for Disk Labels
    Logical Volume Group 924F52D2-E4E5-4C1B-AADC-BAB5663C9BE2 spans 2 devices
    disk2s2+disk0s2: Scan for Metadata Volume
    Logical Volume Group has a 4482 MB Metadata Volume with double redundancy
    Start scanning metadata for a valid checkpoint
    Load and verify Segment Headers
    Load and verify Checkpoint Payload
    Load and verify Transaction Segment
    Incorporate 0 newer non-checkpoint transactions
    Load and verify Virtual Address Table
    Load and verify Segment Usage Table
    Load and verify Metadata Superblock
    Load and verify Logical Volumes B-Trees
    Logical Volume Group contains 0 Logical Volumes
    Load and verify Freespace Summary
    Load and verify Block Accounting
    Load and verify Live Virtual Addresses
    Newest transaction commit checkpoint is valid
    Load and verify Segment Cleaning
    The volume 924F52D2-E4E5-4C1B-AADC-BAB5663C9BE2 appears to be OK.
    The partition map appears to be OK

    So if every thing is OK and the disk is not corrupted, why can't I format it?
     
  4. dilgit thread starter macrumors regular

    Joined:
    Sep 24, 2010
    #4
    When I tried terminal - "diskutil cs list" - I get the following, but no logical id:

    CoreStorage logical volume groups (1 found)
    |
    +-- Logical Volume Group 924F52D2-E4E5-4C1B-AADC-BAB5663C9BE2
    =========================================================
    Name: Internal Drive
    Status: Online
    Size: 3121237860352 B (3.1 TB)
    Free Space: 3106705375232 B (3.1 TB)
    |
    +-< Physical Volume 34223C03-3916-48CE-A8F7-7528BF7737C3
    | ----------------------------------------------------
    | Index: 0
    | Disk: disk2s2
    | Status: Online
    | Size: 3000249008128 B (3.0 TB)
    |
    +-< Physical Volume 3530DC6C-2518-474B-BC81-3D68DEAFCF7D
    ----------------------------------------------------
    Index: 1
    Disk: disk0s2
    Status: Online
    Size: 120988852224 B (121.0 GB)
     
  5. hfg macrumors 68040

    hfg

    Joined:
    Dec 1, 2006
    Location:
    Cedar Rapids, IA. USA
    #5
    Hi-

    What you listed for the "diskutil cs list" looks pretty normal, except for 2 things:
    1 - I usually see a "Logical Volume Family" which shows the final Fusion drive name and total size immediately following that you listed above.

    2 - Your Physical Volumes seem to be in the reverse order, which may not really mean anything here, but it is different (Index: 0 is your hard disk, and Index: 1 is your SSD.


    First ... DO YOU HAVE A FULL BACKUP?

    If so, it might be easiest to follow one of the many DIY Fusion posts or links and "break" the fusion drive, then rebuild it ... and then restore your data. This will absolutely destroy any data contained on the drives, so if you don't have a backup, it may be prudent to hold off doing this as a last-resort.


    -howard
     
  6. gnasher729 macrumors P6

    gnasher729

    Joined:
    Nov 25, 2005
    #6
    At the moment, every Mac with a Fusion drive is still under warranty, so I would let Apple sort it out. Might very well be a hardware problem that's impossible for you to fix.
     
  7. Fishrrman macrumors G3

    Joined:
    Feb 20, 2009
    #7
    "Fusion drive has died... Now what?"

    Something tells me we're going to be seeing a LOT of posts like this in the future...
     
  8. Kissaragi macrumors 68020

    Joined:
    Nov 16, 2006
    #8
    Why? Hard drives fail sometimes, i see no reason why the fusion drive would have a higher than average failure rate.

    But i agree with other people, the op should just contact apple.
     
  9. Nuke61 macrumors 6502

    Joined:
    Jan 18, 2013
    Location:
    Columbia, SC
    #9
    No different than Apple Notifies iMac Owners of Expanded Seagate Hard Drive Recall - the big difference, at least for me, is that with Thunderbolt and USB 3.0 I'll have FAST external backups via SuperDuper! that will allow me to use my computer with continued SSD speeds with a simple reboot and selection of the external backup.
     
  10. hfg macrumors 68040

    hfg

    Joined:
    Dec 1, 2006
    Location:
    Cedar Rapids, IA. USA
    #10
    Of course ... you can do exactly the same thing if your Fusion drive fails. Absolutely no difference in your workflow.
     
  11. bembol macrumors 65816

    bembol

    Joined:
    Jul 29, 2006
    #11



    It's why I (finally) got Apple Care.
     
  12. hfg macrumors 68040

    hfg

    Joined:
    Dec 1, 2006
    Location:
    Cedar Rapids, IA. USA
    #12
    It might be worth a try to simply recreate the Logical Volume (step 2 of creating a DIY fusion):

    diskutil coreStorage createVolume 924F52D2-E4E5-4C1B-AADC-BAB5663C9BE2 jhfs+ Fusion 100%


    The lvgUUID above is yours: 924F52D2-E4E5-4C1B-AADC-BAB5663C9BE2

    You will probably have to restore from your backup ... thankfully you said you do have one.


    -howard
     
  13. Nuke61 macrumors 6502

    Joined:
    Jan 18, 2013
    Location:
    Columbia, SC
    #13
    That's exactly what I was referring to, if the Fusion drive failed. This is a bit different than the earlier Macs because they had FireWire and not Thunderbolt and USB 3.0, so it's a much smaller deal now because we have blazingly fast external options.
     
  14. dandrewk macrumors 6502

    Joined:
    Apr 20, 2010
    Location:
    San Rafael, California
    #14
    With a fusion drive, you have a new drive that uses two technologies. If either fails, the drive tanks. Theoretically, the chances of fusion drive failure is a bit higher.

    But that's a rather massive assumption, especially since SSD are rock solid.

    ----------

    Thunderbolt drives have SSD speeds? Not on my machine. They are blazingly fast, but SSD speeds approach 186,282 mile/second. ;)
     
  15. hfg macrumors 68040

    hfg

    Joined:
    Dec 1, 2006
    Location:
    Cedar Rapids, IA. USA
    #15
    Ahhh ... you must be thinking of the new Optical SSD drives? :D
     
  16. McGiord macrumors 601

    McGiord

    Joined:
    Oct 5, 2003
    Location:
    Dark Castle
    #16
    Is it possible to open these new iMacs and replace the internal hard drive?
    I have not been following these late models, I am interested in buying one, but it seems that it can only be serviced by Apple?
    I appreciate your comments.

    THanks
     
  17. Nuke61 macrumors 6502

    Joined:
    Jan 18, 2013
    Location:
    Columbia, SC
    #17
    Near enough that you can't tell the difference without measuring it. The I/O speeds are what really differentiate an SSD from spinning disks, not raw transfer speed. Even my 2010 iMac with the Mercury Electra SSD through FireWire was fast enough that it felt pretty much like my MBP with an internal SSD.
     
  18. dandrewk macrumors 6502

    Joined:
    Apr 20, 2010
    Location:
    San Rafael, California
    #18
    768gb ssd:
    Black Magic Read: 430 MB/s Write: 450 MB/s
    QuickBench Seq.Read: 267 Seq.Write: 238 Rnd.Read: 132 Rnd.Write: 175
    QuickBench 1gb Seq.Read:476 Seq.Write: 440

    3tb Lacie Thunderbolt:
    Black Magic Read: 180 MB/s Write: 188 MB/s
    QuickBench Seq.Read: 142 Seq.Write: 136 Rnd.Read: 29 Rnd.Write:35
    QuickBench 1gb Seq.Read: 188 Seq.Write: 187

    Less Scientific: It takes 20 seconds startup (apple logo to desktop icons appearing) with the SSD. Booting off a CCC clone on the Lacie Thunderbold took nearly one minute, 15 seconds.

    Not exhaustive, but still it tells me that that SSD speeds are significantly and noticeably faster. Nobody would argue that Thunderbolt isn't fast enough for anybody, but I don't think you can say they match SSD speeds.
     
  19. Nuke61 macrumors 6502

    Joined:
    Jan 18, 2013
    Location:
    Columbia, SC
    #19
    [​IMG]
    These are all external drives, and speeds with SSD via Thunderbolt or USB 3.0 is close enough to internal SSD speeds that you won't notice the difference unless you're running benchmarks. I guess I wasn't clear enough that I was referring to an external SSD vs internal SSD when I said external Thunderbolt booting.
     

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