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Logical drives on a RAID 5 array

Zucarita9000

Golden Member
I'm setting up a new server with a 4 disk RAID 5 array (10k 146GB SAS drives). I was wondering if I should configure the array as a single logical volume (about 400GB in size) or create two volumes, one for the OS and another one for data.

Since data is split across all four drives, is there a reason I should create two volumes?
 
in case of an OS reinstall the data does not need to be "Backed up"... you simply format and install to the OS partition... even though both are split accross 4 drives, that splitting just protects you from a single drive failure... and ONLY from a single drive failure... think of other sources of failure and protect against them as well.
 
General consensus seems to be create a RAID1 for the OS and another RAID set of level 5, 10, etc depending on the usage patterns. But with only 1 disks that limits your options quite a bit.
 
I know, but since these damn SAS SFF drives are so damn expensive, I'll stick to a single RAID5 array. I do have a spare one (we bought 5), but I'll keep it as a hot spare o in a drawer just to be safe.
 
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