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Are my HDDs dying?

Nomanor

Nomanor

Member
I have a NAS with 4 disk array, all stretched into RAID 0
2 of the disks are fully good and the other 2 are acting up. Please help me determine if the replacement is needed:

Disk 1: QNAP software reports some SMART problems:

1375958211-clip-52kb.png




Disk 2 is having read/write problems and QNAP software detected about 200 bad blocks:

1375958250-clip-29kb.png


What do? 😱
 
I'd like to think I would do RAID 5 if I have 4 drives available. IME if SMART is giving you issues, you have a problem. It's the times you have an error that SMART doesn't detect that gives you grief.

I would replace the drive, and consider a difference RAID strategy.
 
Its RAID 0, there's no easy way to deal with it. You could choose to ignore it, do a full format(not quick) which has worked for me or the expensive solution, mirror the information to a new HDD and use the affected HDD for something less important.
 
RAID0 for a NAS array is a risky affair if the stored data is of any real value. If there are reasons to use RAID0, then the entire array should be backed up if the data is important. Otherwise, tough beans, . . . grin and bear it.
 
I assume you use RAID-0 because you backup often. Reallocated sectors are the worst. In my experience, it only gets worse, fast. I would make an exact copy of the disk ASAP to avoid any further data corruption. Silent data corruption is a bitch, and you should check your files' contents after fixing the array.

As far as this disk is concerned, I wouldn't even trust it for external storage. It could silently corrupt zipped files, encrypted containers, executables, source code and create huge problems. It being used for backup is out of the question for obvious reasons. However, it could be used as a portable media library, video and audio files are very resistant to data corruption.
 
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