So… which type of RAID array and RAID controller do you prefer?
My answer is -
HP - because if you have two identical HP machines, and the one gets damaged (except for its hard drives) you can take out the entire RAID array, plonk it into the other machine, and it will start up, no questions asked from the RAID controller. Windows may moan about new hardware and re-activation, but that’s it. (Not sure if other RAID controllers will allow this).
Intel RAID - it performs a regular patrol read, and I think this is a crucial point in preventing a rebuilding RAID-5 from borking itself. I’ve had several Intel servers with Intel RAID controllers, all of them have suffered a degraded RAID at one point in time, and yet I have had successful RAID rebuilds with RAID5 and RAID6 setups.
Of course, the drawbacks of having a branded RAID controller and associated setup is that you absolutely must find a compatible RAID controller should the original controller freak out (and hopefully not corrupt your data)…
Software RAID I’ve had very little experience with, but it do work great - but then you’ll need to be extremely sure you swap out the correct disk! Hardware RAID with a hotswap cage have the benefit of showing you which drive’s borked. (HP hard drives have LED indicators on them showing you which drive’s OK and which’s not).
So, over to you guys.