I previously had a RAID 5 setup on 3 WD RE3 1 TB drives and had it partitioned as 2 - 300GB OS drives (Windows 7, Server 2008 Dual Boot) then I had a 1.8 TB partiton for storage. It worked very well until an RE3 drive began to fail. I was able to recover it once, but now it has failed again, and while rebuilding, I rebooted and knocked out a second drive. Now I am recovering data, and have a 5 year warranty on the drive tat has failed twice whcih I will have replaced by WD. I bought another identical drive which has never been unpackaged. I also have a WD 150GB Velociraptor that I was using as page file storage. My system is Core i7 with 12 GB of RAM on an EVGA X58 3 way SLI MB. 2 questions - 1. If I setup 4 - 1TB drives in RAID 5, and 2 fail, can the existing 2 recover them, or does RAID 5 only tolerate 1 failed disk regradless of how many are in the volume? and 2. Should I change my setup? and what would you guys recommend? I had no problems with my setup for about 14 months. It was fast, recovered from errors on it's own, never lost any data, etc. SHould I do the same setup? should I run the OS on the Velociraptor, and use the 4TB volume for storage? or should I rebuild the RAID 5 volume the way I had it only adding the additional 1TB drive? I want speed and redundancy. I also have a 2TB WD my book external drive with 750 GB free. Please give me some advise so that I go with the best option, and don't have to recover this way again. Thanks!
If the hard drive doesn't respond within 7 seconds (TLER?), the Intel controller kicks it out of the array. I assume the RAID 5 array couldn't handle the download speeds at the time? 700+kb/sec? Anyway, still trying to figure this out, and I'm thinking of going with 2 - 600GB WD HLHX Velociraptors in RAID 0, then use the 4TBs in RAID 5 for storage only. Then I just need a solid backup routine (What is best for this? Something that does incremental, differential backups. Can the default windows 7 backup do this?) Thoughts?