On Sat, 2008-06-07 at 11:15 -0500, Ron Johnson wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On 06/07/08 07:27, Mag Gam wrote: > > > > I have a RAID controller with 256MB of on board cache and its connected > > to 12 500GB SATA disks. I am planning to create 2 RAID groups (6 disks > > each), but I don't know what is the optimal stripe size should be. > > That's very controler-specific. Read the manual. > > > Also, once I stripe on the RAID controller I am planning to use LVM. Is > > striping a good idea? What should I consider for the filesystem? > > Striping is a GREAT idea IFF you want serious speed, but don't care > about your data. If one of the disks goes flaky, *all* the data on > the stripeset goes poof. > > So, *never* use striping on a production server!! Unless you hate > the company, are vindictive, and are about to leave. > > Otherwise, use RAID 0, 10, 0+1 or 5. > > If you make huge RAID sets, I don't see the purpose of LVM. OTOH, for one, if you make a bad partition choice. With LVM, you can shrink one and grow the other as needed. > if you make 6 mirror sets, use LVM to make a 6 "device" unit. > > Also, Damon is correct about booting. In fact, I'd have a separate > boot device. > > Lastly, to what media are you going to back all this data up? How > frequently? > > - -- > Ron Johnson, Jr. > Jefferson LA USA To back up Ron's input: http://www.linuxjunkies.org/html/LVM-HOWTO.html#s8 it is a bit dated, but the info is good. -- Damon L. Chesser damon@damtek.com http://www.linkedin.com/in/dchesser
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