Last edited:
Hey guys,
I had three WD 4TB RED (WD40EFAX) drives in a self-built Linux file server. I replaced these into the file server for older drives that were failing.
Immediately I was getting occasional CRC errors in dmesg, especially during RAID rebuild or high-load operations. These errors were coming from all three drives... So, figured this was the file server on its way out (it's pretty old) and decided to go for a Synology DS1621+ to put them in, along with three more of the same drives, instead.
During the initial RAID build, I am seeing similar errors from the synology box, from *all six* drives. These look like:
- "Read abnormality (UNC error) is detected on Drive x"
- "Bad sector was found on disk[x]
(where x is a number between 1 and 6)
I have run an *extended* S.M.A.R.T. test on all six drives (the one that takes ~200 minues,) and they don't show any errors - and the synology box has continued building the RAID and is not showing it in a bad state.
I have heard bad things about these EFAX drives but surely they are not so bad that 6 identical drives would all be unusable? So, how much should I worry about these errors?
I am pretty sure that the synology is not bad, as the drives were doing the same thing in my old Linux box.
The drives aren't on the _official_ compatibility list for the Synology, but I figured I could get away with it. Have I just cost myself £600 in unusable storage?
Any advice on what I should do here?
I had three WD 4TB RED (WD40EFAX) drives in a self-built Linux file server. I replaced these into the file server for older drives that were failing.
Immediately I was getting occasional CRC errors in dmesg, especially during RAID rebuild or high-load operations. These errors were coming from all three drives... So, figured this was the file server on its way out (it's pretty old) and decided to go for a Synology DS1621+ to put them in, along with three more of the same drives, instead.
During the initial RAID build, I am seeing similar errors from the synology box, from *all six* drives. These look like:
- "Read abnormality (UNC error) is detected on Drive x"
- "Bad sector was found on disk[x]
(where x is a number between 1 and 6)
I have run an *extended* S.M.A.R.T. test on all six drives (the one that takes ~200 minues,) and they don't show any errors - and the synology box has continued building the RAID and is not showing it in a bad state.
I have heard bad things about these EFAX drives but surely they are not so bad that 6 identical drives would all be unusable? So, how much should I worry about these errors?
I am pretty sure that the synology is not bad, as the drives were doing the same thing in my old Linux box.
The drives aren't on the _official_ compatibility list for the Synology, but I figured I could get away with it. Have I just cost myself £600 in unusable storage?
Any advice on what I should do here?