So - I have started converting my drives from RFS --> XFS as I was getting I/O errors. (Still need to do this for the 3x 8TB drives.)

 

So it was a long process - lots of files moved on and off several HDD's.

 

Did parity rebuild after this - and got a few errors  - OK quite a few, at 605 million or so. 

 

And then  2 drives went MIA. (Disk 5 and 6)

 

So shutdown and restart - and both HDD's are back - but I worry they will shit themselves proper soon - and 2 at the same time = BAD.

 

So looking for advice please on what I should do next.  

 

TIA.

 

Notes: 

1.  I have an old 4TB I could swap in and a new 8TB has just arrived as well.

2. Log attached.

 

 

tower-diagnostics-20190412-2048.zip

Edited April 12, 20197 yr by driller1969
typo

Diags are after rebooting so we can't see what happened, but disk5 looks fine, a few CRC errors so probably a bad SATA cable.

 

Disks 6, 7 and 8 are failing, you don't even have dual parity, so IMO best bet would be to copy everything you can from those disks to new ones and then resync parity, alternatively use ddrescue on them.

 

 

TY and will do.