4 ms·
Even with datasheet values -- rebuilding a RAID5 with 4 TB or even larger disks has a significant chance of failure (iirc about 15 % for HGST MegaScale 4 TB dri
by dom0 10y ago
Even with datasheet values -- rebuilding a RAID5 with 4 TB or even larger disks has a significant chance of failure (iirc about 15 % for HGST MegaScale 4 TB drives; since the BER is pretty much a constant, it will be much worse with larger drives. RAID5 probably does not make much sense with 8, 10 or 12 TB drives.).
- AstralStorm 10y agoThis is why RAID6 and similar are used. Or tree like structure of RAID10. Mostly because the probability of a HDD dying whole is lower than in part, you get much more of the extra redundancy than expected. These should be also patrolled and resilvered regularly, which should catch imminent failures too.