Is RAID1 easier to recover from than RAID5?
Posted on 2011-03-24
Hi, I am putting together a quote for a new Dell server. I am trying to decide whether to go with RAID1 or RAID5 -- I've done both setups in the past and also setups containing RAID1 for the operating system and RAID5 for data.
My basic question is--if a drive goes bad in RAID1, or furthermore if the disk controller goes bad but I have one drive that is OK, can I just boot to this single drive without needing to recreate the RAID1 LUN?
For this client they only need about 1-2 TB storage. I'm thinking of just using two 2TB drives in RAID1. This will host VMware ESXi (free version) and a couple vm's. I'm leaning towards using RAID1 because of its simplicity and also because it seems more reliable in a disaster scenario if the RAID controller goes out of wack. I just went through a horrible experience of a RAID5 LUN that crashed and I couldn't bring it back online. I don't think it was bad disks but a bad controller. I'm wondering if I would have been able to recover data if it was a RAID1 and I had one good disk--could I just pop it out of the broken server and then access on a different system?