[smartmontools-support] Drives on a 3ware RAID 1 array both showing identical read errors?

[Mark L. <mel...@gm...>]

Hi,

I've got a couple of Western Digital 500 Raid Edition drives in a mirrored RAID array on a 3ware 8006-2LP SATA controller. 

The drives replaced a couple of older 120gig Hitachi drives that have worked fine for years. 

I'm seeing some very strange error reports from smartd though in that the self test for both drives are reporting a read failure for the exact same LBA:

# smartctl -a -d 3ware,0 /dev/twe0
...
# 1  Short offline       Completed: read failure       10%       779         4292870155


# smartctl -a -d 3ware,1 /dev/twe0
# 1  Short offline       Completed: read failure       10%      1725         4292870155


I've already replaced a previous disk on port #0 because the controller issues an ATA Port timeout error and kicked it out of the array. Yesterday, the controller reported an ATA Port timeout error on port #1 and kicked it out of the array. 

However, given that smartd is reporting the same error, at the same LBA for both drives, this seems like it's something other than the drives causing the problem?

Any ideas?

Thanks,
Mark