EqualLogic Storage Pools Failure Potential
Posted on 2012-12-20
As anyone familiar with EquaLogic knows, a pool can have multiple members, but a member cannot participate in more than one pool. At least that is my understanding, please correct if I am wrong.
The next assumption I have is that given two identical members set at the same RAID level in a pool, when creating a volume in that pool the volume will eventually span the two members? Is that correct?
If a volume does span the members in a pool and one of the members completely fails (power power supplies in one member looses power for example), then the volume will essentially be offline, is that correct? Yes, there is a very slim chance that such a power event would occur in a properly designed and implemented environment, but I'm looking at the theoretical here.
What does EqualLogic do to prevent issues with the volume when such an event occurs?