October 9, 200817 yr I think I already know the answer to this but will ask anyway. Does unraid only know of a problem on a disk when you run a parity or some other kind of check? What I am trying to find out is if I have unraid do a parity check each month (automatically thru a script here) I know it will know if there is a problem then but what about any other time. Will I get the "red ball" if it finds a problem on it's own and send me an email provided I setup the email script from here?? I just want to make sure I am doing everything I can possibly do to prevent multiple drives from going bad. Ideally, and I am pretty sure this is the way it works, I would like to have the email script setup and be notified as soon as a drive goes bad or starts to go bad so I can hurry up a replace it before another goes bad and I loose data. I was hoping I didn't have to wait for the monthy parity check to tell me the drive was going up. Thanks, Scott
October 9, 200817 yr unRaid will take the disk out of service when it is no longer accessible. (can't read or write) A parity check reads every sector on every disk. It allows the SMART firmware on your disks to re-allocate a sector if one becomes unreadable. Keeping an eye on the SMART status report will go a long way to knowing when a disk is starting to fail. Other than that, unRAID will take a drive off-line if a write to it fails. If a read fails, from what I understand, it will reconstruct the data from the other remaining drives and attempt to write the block back to the failed drive. That will re-allocate the sector if it is the cause of the read-error. If the subsequent write fails too, the drive will be taken out of service (marked as "RED" in the interface) It sounds like you are doing everything right. The e-mail alert is a huge step. Replacing any failed drive as soon as possible is another. Joe L.
October 9, 200817 yr Author Thanks Joe, that helps. So I by looking at the SMART report I am looking to see if it is marked as Failed or not, right??? I don't need to run a SMART check on it, right?? Thanks!!!
October 9, 200817 yr Thanks Joe, that helps. So I by looking at the SMART report I am looking to see if it is marked as Failed or not, right??? I don't need to run a SMART check on it, right?? Thanks!!! By the time it is marked as FAILED a disk has progressed to where it is pretty bad. You would probably want to replace it before it actually fails. You should run the "short" test at the least (takes a few minutes), and the "long" tests (takes about 2 hours or so) every month or so. Joe L.
October 12, 200817 yr You should run the "short" test at the least (takes a few minutes), and the "long" tests (takes about 2 hours or so) every month or so. Joe L. Can you please explain how to run a "short" and "long" test on the drives?
October 12, 200817 yr There is some information in the Wiki http://lime-technology.com/wiki/index.php?title=Troubleshooting#Hard_drive_failures
October 12, 200817 yr Doh. Thanks. Perhaps this might be a good switch to implement in the GUI. Ie. Run 'Long' test monthly at X:XX time.
October 12, 200817 yr Doh. Thanks. Perhaps this might be a good switch to implement in the GUI. Ie. Run 'Long' test monthly at X:XX time. You can make feature requests in the feature request forum. In addition Joe L has made a cool program to aid in allot of maintenance tasks. http://lime-technology.com/forum/index.php?topic=2110.0
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