SBS Server - RAID1 vs RAID5 for reliability
Posted on 2009-07-05
I've been working with servers for a while (mostly for small business customers), when ordering new servers (Always Dell) I normally go for a mirror (2 drives) for the OS and RAID5 (with 3 drives) for the Data, the data is always backed up to tape or external USB/NAS drives as well and not totally reliant on RAID for backup purposes.
My query is, is RAID5 actually reliable?, I meet a lot of techs and some have told me they have had bad experiences with RAID5 where one drive goes down and putting in a new drive doesnt actually rebuild the data so now they only use RAID mirrors.
Secondly (and more importantly) if I did have a server with RAID1 and one of the drives failed, if for some reason the controller failed as well and I could not put in a new controller of similar type will the drive work as a standalone drive?, or put another way does the hard drive have data on it that relies on the RAID controller in any way or can I put it on another completely different bare metal system and see 100% of the data.