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