11 x 4TB disk, 33TB RAID6 rebuild times?

Lanz

Lanz

Lanz

Soldato
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Romford
ok so I have a server with 12 x 4TB disks, 11 Disk Raid6 array with 1 spare.

Lets have some guessing on how long a rebuild will take onto the spare?
 
Used space wont matter, most controllers require the whole array to be rebuilt.

A couple of days back I rebuilt a 8 disk RAID 5 array made up of 2TB disks and this took around 13 hours - it initially quoted 172 hours!
Scale that up I'd expect in the region of 34 hours.
 
Last edited:
Half used. But I don't think that matters on a rebuild as I imagine it just has to write blocks even if they are don't have any data.
 
I'm estimating over a week, as we have a 30TB raid50 array with 2TB disks and that takes about 5 days, and raid6 is much slower than raid50.
 
It's basically impossible to say with much certainty, details of the system and raid controller would help but it still depends on a lot of different factors...
 
Our DAS has 15 x 2TB disks making 24TB in a raid 5. Rebuild times were two to three days. Too long for us so we made smaller arrays as nothing on it was critical data.
 
DFish said:
Lots of missing (system) information, so no point asking for timescales.

Fish
Click to expand...

Where is the fun in that? It's a guess the number of sweets in a jar question. You don't ask them to weigh the jar without the sweets, then with the sweets and divide the difference by the average weight of a gummy bear now do you?


I've never paid attention to the rebuild times and don't look after the main storage arrays but I'll put a guess in at 120 hours.
 
Completed today, less than 2 days - not too bad!

Fri Jan 03 15:55:33 2014 Storage Service Virtual Disk Redundancy has been degraded: Virtual Disk 1 (11 Disk RAID 6) Controller 0 (PERC H710P Mini)

Sun Jan 05 00:36:21 2014 Storage Service Physical disk Rebuild completed: Physical Disk 0:1:11 Controller 0, Connector 0
 
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