I came across this article about RAID systems under Linux, and some of the problems that can occur.
It’s interesting reading, especially the explanation as to why a single drive failure in a Linux RAID system is often also followed by a second failure before the array has had a chance to rebuild … rather concerning, since that can effectively negate the redundancy benefit of having a RAID in the first place.
Let’s hope my MegaRaid SATA150-6 controller doesn’t suffer from similar problems…
Also of interest: drive manufacturers appear to be routinely making minor adjustments to the size of discs, even when the model number remains the same – this can cause problems when swapping out a dead drive, if the replacement is slightly smaller. Might be an idea to stockpile a few spare drives to have on hand which are from the same batch as your original set.