Keep disk and raid adapter firmware up to date Change disks very soon after the failure or when reported they will fail soon Best to have a hot spare in place Do not use refurb or recertified disks Your disks are not going to die all at once, except due to a firmware glitch, an unusual power issue or a very unusual drive PCB component failure.
Hello, We have a few Power Edge R510 ( 12 disk options, RAID-6 ). The disks are getting old and a few died this winter (3 total on a specific server). I have little experience with maintaining systems with RAID arrays. So, I am wondering what is the best strategy to take: 1) keep replacing diligently the disks as they die  2) replace all disks in one shot (we do have enough spare distributed space to do it) I guess my real question is : at some point, are the disks going to die all together and put us at risk of loosing data even if I keep changing the disks as soon as they fail ? Am I gonna wake up one morning with 3 disks dead ? Thanks in advance for your comments Gilbert 
Changing the disks on a Power Edge R510 -- Dos and don'ts ?