What is "ACSP"? This doesn't ring any bells with me? Is it supposed to be important?
I don't consider it to be semantics. "RAID 0" is simply incorrect. It's not redunant. In fact, your reliability is divided by the number of drives a volume occupies. So a 2-drive strip is half as reliable as a single disk, a 3 drive stripe is a third or less as reliable as a single drive.
At Server North, our SAN is RAID1 then spanned. We have 4 pairs of drives, each pair is mirrored, the 4 mirrors are concatenated together. As an added bonus, each half of the mirror is in a different server. (Multiple GigE networks bring it all together) We *could* call this RAID1+0 as gconcat and UFS spread the data, but it'd be a stretch.
We use 300GB Seagate SATAs on HighPoint RocketRAID1820A cards. (It may be a RAID card, but we use the drives directly/individually). We use Seagates for a few reasons:
-> NCQ
-> 5a warrenty
-> fast
-> reliable
-> about 1% over market price for similar drives
Our machines run FreeBSD 5.x and things are working quite well for us.
Another nice resource for RAID descriptions is ACNC.com and then click on "RAID.edu" |
