On Fri, Apr 27, 2007 at 04:56:40PM -0400, Ruslan Sivak wrote:
I am now trying to set up raid10 manually by using mdadm, but it gives me an error, and when looking at dmesg, it says "md: personality for level 10 is not loaded!".
As it happens, I have just assembled four disks into a raid-10 array. Assembly is trivial; however there was a non-obvious step required to make it start the raid-10 array at boot time.
My notes are here:
http://wiki.xdroop.com/space/Linux/Software+Raid+compound+devices
Incidentally, I'm trying to use this as the back end of a nfs file server; does anyone have any advice for improving performance (lots of small files, lots of reads and writes and deletes, some large files) other than "run bonnie++ and iozone, fiddle, and repeat"? (Dell PowerEdge 2800, 2x36 + 4x300, CentOS 4.4 x86_64)