Issue with Backup RAID

  • Posted: 04 September 2013 11:43 AM

    Hi Guys,
    I’m having a issue that is of grave concern to me regarding my backup RAID.

    I bought a large 12 TB RAID - Mercury QX2 from OWC. I partitioned it into 6 volumes and I recently erased one volume. What is concerning me now is the way the drive appears in Disk Utility.  It USED to display it like this.

    QX2
        QX2_Projects
        QX2_Samples
        QX2_Storage
        and so on listing each volume.

    Now, QX2_540GB does NOT appear as a volume in the Finder at all!

    If you have a look at the screenshot you will see that the partitions QX2_540GB and QX2_Projects are appearing as Drives, not volumes. I don’t know why it is doing this and I would like to know if this is safe or not. I would be fine erasing and reformatting the entire drive as it’s basically a clone of each of my hard drives in my mac pro but I would prefer not to.

    When I select the QX2_540GB drive OR volume, it repairs EACH and EVERY volume in the QX2 drive which is rather bizarre!

    I would greatly appreciate any suggestions!

    [ Edited: 04 September 2013 11:46 AM by Felix Bird ]

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    Posted: 05 September 2013 03:10 PM #1

    Curious what it says at the *bottom* of the Disk Utility window when those are selected. Also curious what System Profiler/System INformation say about Serial-ATA, etc.

    Signature

    -Dave Hamilton / The Mac Observer / Mac Geek Gab / Dave on Twitter
    When you find a big kettle of crazy, it’s best not to stir it.

         
  • Posted: 18 September 2013 02:07 PM #2

    Sorry - I didn’t get a notification that you had kindly replied!

    This is what is written in Disk Utility:

    Name :  QX2_540GB
    Type :  Logical Volume Group

    Disk Status :  Online
    Total Capacity :  516.71 GB (516,714,885,120 Bytes)
    Free Space :  516.4 GB (516,396,109,824 Bytes)
    Physical Backing :  disk4s8

    —————————-

    Name :  QX2_Projects
    Type :  Logical Volume Group

    Disk Status :  Online
    Total Capacity :  2 TB (2,003,895,398,400 Bytes)
    Free Space :  0 Bytes
    Physical Backing :  disk4s3

    ————

    And this is when the QX2_Projects partition is highlighted:

    Name :  QX2_Projects
    Type :  Logical Partition

    Disk Identifier :  disk7
    Mount Point :  /Volumes/QX2_Projects
    Disk Status :  Online
    File System :  Mac OS Extended (Journaled)
    Writable :  Yes
    Universal Unique Identifier :  BCBAF980-8B04-304D-A911-1EAE65639773
    Capacity :  2 TB (2,003,576,623,104 Bytes)
    Used :  1.64 TB (1,636,674,314,240 Bytes)
    Number of Files :  771,390
    Number of Folders :  320,041
    Owners Enabled :  Yes
    Can Turn Owners Off :  Yes
    Can Repair Permissions :  No
    Can Be Verified :  Yes
    Can Be Repaired :  Yes
    Can Be Formatted :  Yes
    Bootable :  Yes
    Supports Journaling :  Yes
    Journaled :  Yes


    This is what I got from the Serial ATA in sys profiler:


    Marvell 88SE9172:

      Vendor: Marvell
      Product: 88SE9172
      Link Speed: 6 Gigabit
      Negotiated Link Speed: 3 Gigabit
      Description: AHCI Version 1.00 Supported

    eSATA-2 ExternalRAID:

      Capacity: 9 TB (9,001,625,346,048 bytes)
      Model: eSATA-2 ExternalRAID
      Revision: 0
      Serial Number:        Z1F0YB9A
      Native Command Queuing: No
      Removable Media: No
      Detachable Drive: No
      BSD Name: disk4
      Medium Type: Rotational
      Partition Map Type: GPT (GUID Partition Table)
      S.M.A.R.T. status: Verified
      Volumes:
    disk4s1:
      Capacity: 209.7 MB (209,715,200 bytes)
      BSD Name: disk4s1
      Content: EFI
    QX2_Samples:
      Capacity: 3 TB (3,000,000,000,000 bytes)
      Available: 902.86 GB (902,859,235,328 bytes)
      Writable: Yes
      File System: Journaled HFS+
      BSD Name: disk4s2
      Mount Point: /Volumes/QX2_Samples
      Content: Apple_HFS
      Volume UUID: 67E303DC-7F41-3C25-ADBF-CE04AB5218B6
    disk4s3:
      Capacity: 2 TB (2,003,895,398,400 bytes)
      BSD Name: disk4s3
      Content: Apple_CoreStorage
    Boot OS X:
      Capacity: 134.2 MB (134,217,728 bytes)
      BSD Name: disk4s4
      Content: Apple_Boot
      Volume UUID: FACE9AC7-0063-3BA3-811D-60C7FE7FDAC8
    QX2_Storage:
      Capacity: 3 TB (3,000,000,000,000 bytes)
      Available: 2.06 TB (2,064,779,509,760 bytes)
      Writable: Yes
      File System: Journaled HFS+
      BSD Name: disk4s5
      Mount Point: /Volumes/QX2_Storage
      Content: Apple_HFS
      Volume UUID: D1F3F531-D04B-3839-B98B-6845DD8772C5
    QX2_System_1:
      Capacity: 240 GB (240,000,000,000 bytes)
      Available: 131.71 GB (131,713,863,680 bytes)
      Writable: Yes
      File System: Journaled HFS+
      BSD Name: disk4s6
      Mount Point: /Volumes/QX2_System_1
      Content: Apple_HFS
      Volume UUID: B9A8ECFB-D333-35B2-BDFF-0A5726BDDC4B
    QX2_System_2:
      Capacity: 240 GB (240,000,000,000 bytes)
      Available: 107.98 GB (107,983,302,656 bytes)
      Writable: Yes
      File System: Journaled HFS+
      BSD Name: disk4s7
      Mount Point: /Volumes/QX2_System_2
      Content: Apple_HFS
      Volume UUID: F3D4FDA0-DE7F-3ABC-8C8F-E49C6FA35EBF
    disk4s8:
      Capacity: 516.71 GB (516,714,885,120 bytes)
      BSD Name: disk4s8
      Content: Apple_CoreStorage
    Boot OS X:
      Capacity: 134.2 MB (134,217,728 bytes)
      BSD Name: disk4s9
      Content: Apple_Boot
      Volume UUID: 08FB04BF-BD32-316E-8CDE-650662E69675

     

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    Posted: 02 October 2013 11:57 AM #3

    It’s using CoreStorage and, effectively, LVM to define all this stuff. I think you’re fine…

    But as with anything (and especially things that are combining drives) keep backups of your data. If this falls apart, you’re left with nothing.

    Signature

    -Dave Hamilton / The Mac Observer / Mac Geek Gab / Dave on Twitter
    When you find a big kettle of crazy, it’s best not to stir it.

         
  • Posted: 05 October 2013 01:52 PM #4

    Thanks very much Dave. This device IS the backup - does that change anything?
    F