[CentOS] 6.2 - How to check for a failed disk using LVM with a hardware RAID (3ware)

[Dennis Jacobfeuerborn]

On 04/05/2012 02:38 PM, Jonathan Vomacka wrote:
> CentOS Community,
> 
> What commands can I use to check the disk health of the system when LVM2 
> is being used on top of a RAID 10 using a HARDWARE 3ware raid card. The 
> OS sees a hardware raid usually as one big drive. Is there a way to 
> check the disks individually to see if any are failing, or throwing hard 
> or scsi transport errors?

You need to get the tw_cli tool from the 3ware page. With this you can
check the health of the raid and its disks:


# tw_cli /c0 show

Unit  UnitType  Status         %RCmpl  %V/I/M  Stripe  Size(GB)  Cache  AVrfy
------------------------------------------------------------------------------
u0    RAID-10   OK             -       -       256K    1862.62   ON     OFF

Port   Status           Unit   Size        Blocks        Serial
---------------------------------------------------------------
p0     OK               u0     931.51 GB   1953525168    WD-WMATV4882192
p1     OK               u0     931.51 GB   1953525168    WD-WMATV4911813
p2     OK               u0     931.51 GB   1953525168    WD-WMATV4884633
p3     OK               u0     931.51 GB   1953525168    WD-WMATV4881597
p4     NOT-PRESENT      -      -           -             -
p5     NOT-PRESENT      -      -           -             -
p6     NOT-PRESENT      -      -           -             -
p7     NOT-PRESENT      -      -           -             -

Regards,
  Dennis