On Mon, Apr 14, 2008 at 4:40 PM, Federico Sevilla III <[EMAIL PROTECTED]> wrote: > On Mon, 2008-04-14 at 00:48 -0700, Michael Tinsay wrote: > > Since you have 3 disks, why not go for RAID 5 to get striping accross > > the three disks? > > This is something I've been hoping to discuss with the other members of > this list. Assuming: > > 1. We'll be using Linux software RAID (md). > > 2. Everything else hardware including the hard drives are identical. > > Which will be faster? > > 1. RAID 1 with two drives > > 2. RAID 5 with three drives > > I'm noticing significant CPU time in IOWait and have a two-drive RAID 1 > setup, and am hoping to beef up the I/O subsystem with the only > realistic option being to add another drive and go into software RAID 5. > I don't know if this will make sense or not, though. > > Comments? Thank you very much.
Note that there is a parity overhead when using RAID 5. Just one thing to consider. I'd go for RAID 0+1, same fault tolerance as RAID 5, but without the parity, more expensive though (requires at least four (?) disks). -- Ian Dexter R. Marquez http://feeds.iandexter.net/Coredump _________________________________________________ Philippine Linux Users' Group (PLUG) Mailing List http://lists.linux.org.ph/mailman/listinfo/plug Searchable Archives: http://archives.free.net.ph
