Good morning all. This question has probably poped up before, but maybe not in this exact way...
I am planning on building a SAN for my home meta centre, and have some of the raid cards I need for the build. I will be ordering the case soon, and then the drives. The cards I have are 2 8 port PXI-Express cards (A dell Perc 5 and a Adaptec card...). The case will have 20 hot swap SAS/SATA drives, and I will be adding a third RAID controller to allow the full 20 drives. I have read something about trying to setup redundancy with the RAID controllers, so having zpools spanning multiple controllers. Given I won't be using the on-board RAID features of the cards, I am wondering how this should be setup... I was thinking of zpools: 2+2+1 X 4 in ZRAID2. This way, I could lose a controller and not lose any data from the pools... But is this theory correct? If I were to use 2Tb drives, each zpool would be 10Tb RAW and 6TB useable... giving me a total of 40Tb RAW and 24Tb usable... Is this over kill? Should I be worrying about losing a controller? Thanks in advance. --Tiernan
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