Solve : Equal wear between RAID 1 drives?

1.	Solve : Equal wear between RAID 1 drives?
Answer» I was just wondering, should RAID 1 drives be swapped even if they are working properly to get equal read wear? How does the RAID system determine which drive to read DATA from. Obviously, it has to write to both of them, so that shouldn't be a problem, but when it reads from them, does it select a drive at random to read from, or does it just choose WHICHEVER one has the FASTEST read speed?Define "read wear". In RAID 1, read requests are serviced by one or other the two drives containing the requested data, whichever one involves least seek time plus rotational latency. Over time this will average out to 50% for each. In any case, neither writing data to, nor reading data from a hard drive causes any "wear" to EITHER the read heads, which float on cushions of air, or the platters. Of course there is wear to the motor that spins the stack of platters, as with a single drive.

Discussion