Software Raid 5 tuning under Linux ?
jason at dstc.edu.au
Sun Nov 3 06:37:01 CST 2002
I've recently given up on an attempt to get some FibreChannel disks
to work with my PV650F array and have instead directly connected
them to a PE2400 fileserver using a 630F and a QLA2200 card.
I currently have 10 73G drives configured as a single RAID5
volume (9 disks plus one spare disk) on a single 100Mbyte/sec
FibreChannel interface. The PE2400 has 2 * 933 processors and
a gig of ram in it.
After some mucking around, the system is seeing a nice bunch of
scsi disk drives and i have gotten around to setting up software
RAID5. I have read the software raid howto, which recommends
a chunk size of 128K, as well as some options for mke2fs.
Can anyone out there offer any tuning advice beyond this ? e.g
larger or smaller chunk sizes or filesystem tuning ? Any other
advice ? particularly on disk failure/recovery..
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