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Forum Discussion
chilled
Sep 06, 2011Follower
Ultra 2: Adding a different drive make to a mirror
I have an Ultra 2, that was bought in a bundle with a Seagate 2TB drive. I've since bought a WD RE4 FYYS drive to mirror it up.
However when I add the FYYS I get a message saying SMART error on the new disk. BUT RAIDar, under system status, shows the drive as healthy.
I've removed the FYYS, stuck it in my PC, ran the WD diagnostics and it has come back as completely healthy.
Support are telling me it's a bad disk, but I'm certain the disk is fine.
I get the sneaking suspicion that the readynas is not happy with a different drive type and that the SMART error message (it's not in any log anywhere) is an incorrect message.
Does anyone have any experience with running a mirror with 2 different drive types (same capacity)?
However when I add the FYYS I get a message saying SMART error on the new disk. BUT RAIDar, under system status, shows the drive as healthy.
I've removed the FYYS, stuck it in my PC, ran the WD diagnostics and it has come back as completely healthy.
Support are telling me it's a bad disk, but I'm certain the disk is fine.
I get the sneaking suspicion that the readynas is not happy with a different drive type and that the SMART error message (it's not in any log anywhere) is an incorrect message.
Does anyone have any experience with running a mirror with 2 different drive types (same capacity)?
1 Reply
- WhoCares_MentorWould have been nice to actually see the SMART stats of the drive in question. Generally different vendors have different opinions about when a drive can still be called "healthy" or to be ore precise "fit for the intended purpose". So for example most consider it acceptable that a disk destined for desktop machines shows some relocation errors and even in that case "some" may vary between a dozen and some hundreds, depending on the vendor. Now while this may be fine for desktop usage - and truth be told, the average user really won't notice - the ReadyNAS seems to be a lot more picky there, and for good reason. I came to believe that the ReadyNAS actually expects a flawless disk otherwise it will report it as failed. In turn it's not uncommon for vendor tools to report a disk to be fine all the while it will get rejected by the ReadyNAS over and over again. Some vendors just replace the disk in such a case, others may point out that using a desktop drive in a NAS is not the intended use case and deny replacement.
-Stefan
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