January 17, 201412 yr Hello, I am running UNRAID 5.0 with 4 total drives for about 2 years (some tinkering and refurbishing). A couple of weeks ago I started noticing synch errors, ran some tests...but now I think my Parity drive may have serious issues. I'm looking for community feedback prior to replacing. I have attached half my syslog (file too big to post full version) after a fresh reboot and parity check (not corrected) last night. I have also attached my SMART tests for 2/4 drives. From reading online it appears that my Parity drive is causing the Parity issues...it appears to be failing. Also, I'm not sure that drive 1 is free from errors either. Drives 2&3 appear normal (didn't post them). Any guidance would be appreciated. Thanks. Patrick syslog-2014-01-17.txt smart.short.disk0.17jan.txt smart.short.disk1.17jan.txt
January 17, 201412 yr Fist thing stop the array. personally I do not see anything wrong with your data disk (disk1) why do you think it's failing? but if you that concern, go get 2 new disks. shutdown the server. take the disk 1 to other PC and copy all data off it so if does fails you are ok. put the disk 1 back. follow the guide for replacing the parity dick. when done and if you still concerned replace the data disk1 as well.
January 17, 201412 yr Author Thanks of the reply. Only concern for Data1 was the Reallocated_Sector_Ct is 2. I guess I'll keep watching that one, assuming nothing else about it seems fishy. Parity - replace it, check. If the drive is out of warranty, do you know if there is there any hope for repairing it? Are there any other tests/repairs I can run?
January 17, 201412 yr It is not worth trying to "repair" a disk. If its showing errors, it is probably on its way out and i would not trust it. Is it a western Digital? and what size is it? WD's RMA site will let you check warranty pretty easily.
January 17, 201412 yr Your disk0 has 25 pending sectors on it and if you look at the Smart self-test logs that disk constantly says "Completed: read failure". I do not know what read failures indicate but that is cause for concern. Does anyone know what the read failures mean? disk1 looks fine. I would just keep an eye on those Reallocated Sectors and make sure they stay at 2.
January 17, 201412 yr not sure if reallocated sectors can stay at 2, but even 100 is not that much cause for concern unless it happens in a short period of time. now you can try push the warranty from WD nicely, go to the website try sending them an email with a nice worded WTF. based on what I have found on the web, it looks like your drive motor is failing. any other setup I say try wait and see but with this, I say replace first but try the disk in a less critical setup and see if it fails completely. maybe plug it in a desktop and use it as a cache for not important data.
January 17, 201412 yr Here's another current thread with a similar problem/question. http://lime-technology.com/forum/index.php?topic=31347 Jonathanm's discussion towards the bottom has a nice explanation of failures, sectors, and reallocations.
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