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Full Discussion: Missing ASM Disks in Solaris 11.3 LDOM
Operating Systems Solaris Missing ASM Disks in Solaris 11.3 LDOM Post 303025036 by gull04 on Tuesday 23rd of October 2018 09:12:01 AM
Old 10-23-2018
Hi Folks,

I have an update to this problem, it's not fixed yet - it's going to take a while to do that as the following explanation will show. So for any one who is interested I have identified the problem as incorrectly partitioned disks on the test server, the production and dr servers were built correctly with the disks sliced from cylinder 1 and Peasant hit the nail on the head - I hadn't checked that because the build document that I handed over did actually specify that the slice must start from Cylinder 1.

So on Production/DR we have;

Code:
Specify disk (enter its number)[11]: 12
selecting c0t600507680C8082780000000000000494d0
[disk formatted]
format> pa


PARTITION MENU:
        0      - change `0' partition
        1      - change `1' partition
        2      - change `2' partition
        3      - change `3' partition
        4      - change `4' partition
        5      - change `5' partition
        6      - change `6' partition
        7      - change `7' partition
        select - select a predefined table
        modify - modify a predefined partition table
        name   - name the current table
        print  - display the current table
        label  - write partition map and label to the disk
        !<cmd> - execute <cmd>, then return
        quit
partition> pr
Current partition table (original):
Total disk cylinders available: 38398 + 2 (reserved cylinders)

Part      Tag    Flag     Cylinders         Size            Blocks
  0 unassigned    wm       1 - 38397      299.98GB    (38397/0/0) 629096448
  1       swap    wu       0                0         (0/0/0)             0
  2     backup    wu       0 - 38397      299.98GB    (38398/0/0) 629112832
  3 unassigned    wm       0                0         (0/0/0)             0
  4 unassigned    wm       0                0         (0/0/0)             0
  5 unassigned    wm       0                0         (0/0/0)             0
  6        usr    wm       0                0         (0/0/0)             0
  7 unassigned    wm       0                0         (0/0/0)             0

partition> quit


FORMAT MENU:
        disk       - select a disk
        type       - select (define) a disk type
        partition  - select (define) a partition table
        current    - describe the current disk
        format     - format and analyze the disk
        repair     - repair a defective sector
        label      - write label to the disk
        analyze    - surface analysis
        defect     - defect list management
        backup     - search for backup labels
        verify     - read and display labels
        save       - save new disk/partition definitions
        inquiry    - show disk ID
        scsi       - independent SCSI mode selects
        cache      - enable, disable or query SCSI disk cache
        volname    - set 8-character volume name
        !<cmd>     - execute <cmd>, then return
        quit
format> quit
root@fvssphsun01:~#

And on the Test Server we have;

Code:
Specify disk (enter its number)[18]: 20
selecting c0t60050768018086B6E80000000000045Bd0
[disk formatted]
Disk not labeled.  Label it now? no
format> pa


PARTITION MENU:
        0      - change `0' partition
        1      - change `1' partition
        2      - change `2' partition
        3      - change `3' partition
        4      - change `4' partition
        5      - change `5' partition
        6      - change `6' partition
        7      - change `7' partition
        select - select a predefined table
        modify - modify a predefined partition table
        name   - name the current table
        print  - display the current table
        label  - write partition map and label to the disk
        !<cmd> - execute <cmd>, then return
        quit
partition> pr
Current partition table (default):
Total disk cylinders available: 38398 + 2 (reserved cylinders)

Part      Tag    Flag     Cylinders         Size            Blocks
  0       root    wm       0 -    15      128.00MB    (16/0/0)       262144
  1       swap    wu      16 -    31      128.00MB    (16/0/0)       262144
  2     backup    wu       0 - 38397      299.98GB    (38398/0/0) 629112832
  3 unassigned    wm       0                0         (0/0/0)             0
  4 unassigned    wm       0                0         (0/0/0)             0
  5 unassigned    wm       0                0         (0/0/0)             0
  6        usr    wm      32 - 38397      299.73GB    (38366/0/0) 628588544
  7 unassigned    wm       0                0         (0/0/0)             0

partition> quit


FORMAT MENU:
        disk       - select a disk
        type       - select (define) a disk type
        partition  - select (define) a partition table
        current    - describe the current disk
        format     - format and analyze the disk
        repair     - repair a defective sector
        label      - write label to the disk
        analyze    - surface analysis
        defect     - defect list management
        backup     - search for backup labels
        verify     - read and display labels
        save       - save new disk/partition definitions
        inquiry    - show disk ID
        scsi       - independent SCSI mode selects
        cache      - enable, disable or query SCSI disk cache
        volname    - set 8-character volume name
        !<cmd>     - execute <cmd>, then return
        quit
format> current
Current Disk = c0t60050768018086B6E80000000000045Bd0
<IBM-2145-0000 cyl 38398 alt 2 hd 64 sec 256>
/scsi_vhci/ssd@g60050768018086b6e80000000000045b

format> verify
Warning: Could not read primary label.

Warning: Check the current partitioning and 'label' the disk or use the
         'backup' command.

Backup label contents:

Volume name = <        >
ascii name  = <IBM-2145-0000 cyl 38398 alt 2 hd 64 sec 256>
pcyl        = 38400
ncyl        = 38398
acyl        =    2
nhead       =   64
nsect       =  256
Part      Tag    Flag     Cylinders         Size            Blocks
  0 unassigned    wm       0 - 38397      299.98GB    (38398/0/0) 629112832
  1 unassigned    wu       0                0         (0/0/0)             0
  2     backup    wu       0 - 38397      299.98GB    (38398/0/0) 629112832
  3 unassigned    wm       0                0         (0/0/0)             0
  4 unassigned    wm       0                0         (0/0/0)             0
  5 unassigned    wm       0                0         (0/0/0)             0
  6 unassigned    wm       0                0         (0/0/0)             0
  7 unassigned    wm       0                0         (0/0/0)             0

format>

As you may be able to gather from the above, the disk on the test server has lost it's primary label - which has been over written by ASM. The original backup label is still there as displayed by the verify command output.

I attempted to duplicate these disks to a set of files in a zpool, where I was going to work on them - but attempting to dd the disks was a problem even using the raw devices.

Code:
root@fvskirsun01:~# zpool create asm_recovery c0t60050768018086B6E800000000000560d0s0
root@fvskirsun01:~# zpool list
NAME          SIZE  ALLOC  FREE  CAP  DEDUP  HEALTH  ALTROOT
asm_recovery  796G   153K  796G   0%  1.00x  ONLINE  -
rpool         556G   177G  379G  31%  1.00x  ONLINE  -
root@fvskirsun01:~# zfs list | grep asm
asm_recovery                     86.5K   784G    31K  /asm_recovery
root@fvskirsun01:~# dd if=/dev/rdsk/c0t60050768018086B6E80000000000045Ad0s0 of=/asm_recovery/asm_01 bs=1024k
dd: /dev/rdsk/c0t60050768018086B6E80000000000045Ad0s0: open: I/O error
root@fvskirsun01:~# dd if=/dev/rdsk/c0t60050768018086B6E80000000000045Ad0s2 of=/asm_recovery/asm_01 bs=1024k
dd: /dev/rdsk/c0t60050768018086B6E80000000000045Ad0s2: open: I/O error

I have spoken with a couple of people and the general consensus is that this situation is non recoverable, but I have a couple of other things to try - I'll be familiarising myself with some low level stuff that I haven't worked with for years. So if I do manage to resolve the problem I'll let you all know.

Many thanks Dennis and Peasant

Gull04
 

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