I have a Duo v2 with 2 2TB Seagate Barracuda drives set up with redundant RAID.
This morning, I got an email telling me that there was a disk failure detected on disk 1.
I downloaded and looked through the logs -- both the error.log and the disk_smart log (dated 5 days ago).
There was no reallocation of sectors error or ATA errors that I could find (using keyword searches).
I re-booted the drive, choosing the option to do a volume scan on reboot.
That generated an email that listed many, many errors (probably >50?) of the following sort: Inode 3637424, i_blocks is 54464, should be 58776. Fix? yes
Q: What type of errors are these? are the reallocation of sector errors? They aren't labeled.
Then, a follow up email: RAID event detected Data volume will be rebuilt with disk 1.
Now, when I look at the SMART Information for Disk 1 (which was empty before the reboot), it says SMART Attribute Spin Up Time: 0 Start Stop Count: 10426 Reallocated Sector Count 0 Power On Hours: 10897 Spin Retry Count: 0 Power Cycle Count: 56 Runtime Bad Block: 0 End-to-End Error: 0 Reported Uncorrect: 0 Command Timeout: 3 High Fly Writes: 0 Airflow Temperature Cel: 42 G-Sense Error Rate: 0 Power-Off Retract Count: 55 Load Cycle Count: 14693 Temperature Celsius: 42 Current Pending Sector: 0 Offline Uncorrectable: 0 UDMA CRC Error Count: 0 Head Flying Hours: 208499187391328 Total LBAs Written: 102085164482192 Total LBAs Read: 107672884226171 ATA Error Count: 0
Should I interpret this is a random error/blip or should I go ahead and replace the drive? Is drive failure imminent? Is there somewhere else in the logs I can look to get any more information about why it generated the disk failure error in the first place?
Re: Disk failure, no errors, rebuilding after reboot
This page also has some useful information about where and how to figure out if a drive needs replacement: http://www.readynas.com/kb/faq/hardware/reallocated_sector_count_has_increased_in_the_last_day
