SAS RAID and SATA drives assigned wrong address ie. /dev/sda
I am installing CentOS 5.2 on a Dell Power Edge 2950 with a SAS 6/ir controller (not a PERC card.)
I have 3 hard dives. I wish to mirror the first two drives and leave the third un-mirrored. The OS will be on the mirror.
I can do all of the above fine, but CentOS is detecting the stand alone drive before the mirrored array.
Configuration with just the first two drives installed and morred:
mirror = /dev/sda
configuration with all three drives installed:
third drive - /dev/sda
mirror = /dev/sdb
Can anybody help me configure CentOS to assign the mirror before the stand-alone drive?
I called Dell support, thinking I was somehow missing an option in the SAS controller, but they weren't much help in solving the issue. They recommending buying another drive or creating a software mirror.