Originally posted by: Vilius

Hello,

P7 machine
PCI Express x8 Planar 3Gb SAS Adapter

RAID10 array(2 disks)(not AIX lvm) was configured and working, then one disk failed and IBM support replaced that. Now raid array is degraded, data is not lost. I see new disk model(same as original) serial and etc.

What I did trying to reconstruct:
Booted diagnostics, launched RAID Array Manager, lets list array status:

->List SAS Disk Array Configuration
------------------------------------------------------------------------
Name      Resource  State       Description              Size
------------------------------------------------------------------------
sissas0   FFFFFFFF  Available   PCI Express x8 Planar 3Gb SAS Adapter

hdisk0    00FF0000  Degraded    RAID 10 Array          283.8GB Rebuild Failed 04
 pdisk1   00030000  Active      Array Member           283.8GB
 pdisk0   00020000  Failed      Array Member           300.0GB

so array is degraded, pdisk0 is new replaced disk(same model as original) - it's size looks bigger but disks not formatted as raid block size look bigger?, I tried to format it using "Create an Array Candidate pdisk and Format to RAID block size" but no items available for operation since pdisk0 is already pdisk not hdisk.
So lets try to reconstruct:

->Reconstruct a SAS Disk Array->select "pdisk0    00020000  Failed      Array Member           300.0GB"
Post processing pdisk0........Rebuild 0% |
  ┌──────────────────────────────────────────────────────────────────────────┐
  │                              ERROR MESSAGE                               │
  │                                                                          │
  │ Press Enter or Cancel to return to the                                   │
  │ application.                                                             │
  │                                                                          │
  │   1800-034 Exit status (255) returned by command.                        │
  │   (Command process used the stdout and stderr                            │
  │   file descriptors inherited from the SMIT process.)                     │
  │                                                                          │
  │ F1=Help                 F2=Refresh              F3=Cancel                │
  │ Esc+8=Image             Esc+0=Exit              Enter=Do                 │
  └──────────────────────────────────────────────────────────────────────────┘

Any ideas how to recontruct / what is wrong ?

Thanks,
Vilius M.

Originally posted by: PontiacGeronimo

hmm, maybe you could remove/cleanup old disks's devices - to rid off the Failed pdisk0 from RAID and then format and add new pdisk0 to the RAID?

Originally posted by: Vilius

Seems like logical thing to do, but how do I do that ? - I was not able to find how to do that.

IBM SAS Disk Array Manager menus looks like that:

  List SAS Disk Array Configuration
  Create an Array Candidate pdisk and Format to RAID block size
  Create a SAS Disk Array
  Delete a SAS Disk Array
  Add Disks to an Existing SAS Disk Array
  Migrate an Existing SAS Disk Array to a New RAID Level
  Configure a Defined SAS Disk Array
  Change/Show Characteristics of a SAS Disk Array
  Manage HA Access Characteristics of a SAS Disk Array
  Reconstruct a SAS Disk Array
  Change/Show SAS pdisk Status
  Diagnostics and Recovery Options->
       Certify Physical Disk Media
       Download Microcode to a Physical Disk
       Format Physical Disk Media (pdisk)
       Format Physical Disk Media (hdisk)
       Display pdisk Vital Product Data
       Display Physical Disk Microcode Level
       SCSI and SCSI RAID Hot Plug Manager
       Reclaim Controller Cache Storage
       Controller Rechargeable Battery Maintenance
       Configure a Defined SAS RAID Controller
       Unconfigure an Available SAS RAID Controller
       Change/Show SAS RAID Controller
       Show SAS Controller Physical Resources
  

For example how do I remove pdisk0 from array ?