Multiple Disk Failure

[gideva]

Good day everybody,

 

yesterday I had a double disk failure (diagnostic attached) and after a SMART extended self test on both disks I got the same result: Completed without error...

Now I would like to know the following:

 

1) Should I change the drives (I would avoid if not really necessary)

2) If I can keep the 2 drives how should proceed for the data rebuilt? one at the time or both togather?

 

Thanks for your help

monstruo-diagnostics-20240729-0007.zip

[JorgeB]

Issues with multiple disks at the same time, and not just two, suggesting a power/connection issue, check/replace cables, especially any splitters and post new diags after array start.

[gideva]

Cables are not even 1 year old and good quality (Corsair). Could have been a power peak or something similar?

 

Regarding the data rebuilt how should I proceed?

 

Thanks

[JorgeB]

1 minute ago, gideva said:

Regarding the data rebuilt how should I proceed?

 

3 hours ago, JorgeB said:

check/replace cables, especially any splitters and post new diags after array start.

 

[gideva]

Sorry....

 

Here you have

monstruo-diagnostics-20240730-0019.zip

[JorgeB]

Both emulated disks are mounting, assuming contents look correct, you can rebuild on top:

 

https://docs.unraid.net/unraid-os/manual/storage-management#rebuilding-a-drive-onto-itself

[gideva]

Done and I just discovered that Disk 10 failed again during data rebuilt (disk 12 still appear ok)...

What shall I do? Stop and retry to built? Let run the rebuilt of disk 12 and than recheck all and give disk 10 a second chance?

 

BTW I just noticed the rebuilt process is totally stopped at 30,2% and not moving and several disks  (3, 5, 6, 7, 8, 9, 10, 11, 15) have errors reported

 

But mainly I would like to understand the reason of the failures... Shall I change once again the cables even if they are new and of good quality or shall I investigate other reasons??

 

Thanks

 

PS Attached last diagnostic

monstruo-diagnostics-20240730-1225.zip

Edited July 30 by gideva

[Michael_P]

Make sure you have sufficient power to each drive - no more than 4 drives per molex power connector, and preferably split across multiple cables from the PSU

 

Make sure your HBA is sufficiently cooled

 

Make sure your cables are connected properly, and not squeezed together so as to introduce crosstalk

 

Try a different slot on the motherboard, or replace the HBA.

[gideva]

Ok I will try all of it...

 

Regarding the rebuilt shall I start again?

[JorgeB]

Like mentioned could also be a PSU or another power related issue, you can start again the rebuild if all disabled disks are mounting and contents look correct.