Are linux-fs's drive-fault-tolerant by concept?
Quoted 3 lines · Alan Cox
Buy IDE disks in pairs use md1, and remember to continually send the hosed ones back to the vendor/shop (and if they keep appearing DOA to your local trading standards/fair trading type bodies).
I buy three drives at a time so I have a matching spare, because AFAIC
you shouldn't be doing RAID on unmatched drives.
Using RAID1 is especially important when using software instead
of hardware for fault-tolerance because the software is more likely to have bugs just because of the 'culture' of hardware vs. software developers, and the RAID5 algorithm is very hard to get right anyway, especially in failure/rebuild mode. Even on a hardware controller RAID5 is still inherently less reliable.
(...and what's all this about unreliable drives, anyway? Every drive
I have bought since 1987 still works.)
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Chuck
Quoted 7 lines
Quoted 3 lines
Buy IDE disks in pairs use md1, and remember to continually send the hosed ones back to the vendor/shop (and if they keep appearing DOA to your local trading standards/fair trading type bodies).
I buy three drives at a time so I have a matching spare, because AFAIC
you shouldn't be doing RAID on unmatched drives.
Err, yes you should :-).
Unless they are spindle syncronised, the advantage of identical physical layout diminishes, and the disadvantage of quite possibly getting components from the same, (faulty), batch increases :-).
Quoted 6 lines
Using RAID1 is especially important when using software instead
of hardware for fault-tolerance because the software is more likely to have bugs just because of the 'culture' of hardware vs. software developers, and the RAID5 algorithm is very hard to get right anyway, especially in failure/rebuild mode. Even on a hardware controller RAID5 is still inherently less reliable.
The advantage of RAID1 over a SLED is probably greater than the advantage of RAID5 over RAID1.
Quoted 2 lines
(...and what's all this about unreliable drives, anyway? Every drive
I have bought since 1987 still works.)
I haven't had a drive failiure for a long time. Maybe I'm just really lucky.
John.