4 ms·
> Thus balancing reads is good for SSD endurance Ergo, non-balanced reading is better for endurance of the array, as it reduces the probability of contemporane
by CodeWriter23 9y ago
> Thus balancing reads is good for SSD endurance
Ergo, non-balanced reading is better for endurance of the array, as it reduces the probability of contemporaneous multi-disk failure. Like disk 2 failing under the read load encountered during a rebuild.
- wtallis 9y agoIn theory, this is true. But the effect of reads on SSD endurance is orders of magnitude smaller than the effect of writes. The reads required for a rebuild aren't going to trigger an endurance-related failure unless the drive was already within one full drive write of failing.
- CodeWriter23 9y agoGood thing you don’t need to write to the remaining drive in a mirror rebuild.
- wtallis 9y agoNot directly, but you will cause some writing to happen internally to the drive if a read disturb is encountered. When the SSD has trouble reading back data due to a read disturb or similar data degradation, it'll recover it using the error correcting codes and then write a fresh copy.