[Ocfs-users] ocfs, multi path and raid

[Rui Amaral]

HI all,

I hope someone can give me some insight on this.

I have finally gotten a RAC database up and running on the RedHat AS 2.1 Linux cluster using OCFS 1.0.9.4.

My XP admin has given dual luns to the drives in which my database sits. 

So the question comes up how do I do this? Using software raid?


on the host os'es:

xpinfo -il


Device File                 ALPA Tgt Lun Port  CU:LDev Type             Serial#
================================================================================
/dev/sda                     c6  00  00  CL2G  00:19   OPEN-9           00040898
/dev/sdi                     dc  00  00  CL1G  00:19   OPEN-9           00040898
/dev/sdb                     c6  00  01  CL2G  00:1a   OPEN-9           00040898
/dev/sdj                     dc  00  01  CL1G  00:1a   OPEN-9           00040898
/dev/sdc                     c6  00  02  CL2G  00:1b   OPEN-9           00040898
/dev/sdk                     dc  00  02  CL1G  00:1b   OPEN-9           00040898
/dev/sdd                     c6  00  03  CL2G  00:1c   OPEN-9           00040898
/dev/sdl                     dc  00  03  CL1G  00:1c   OPEN-9           00040898
/dev/sde                     c6  00  04  CL2G  04:19   OPEN-9           00040898
/dev/sdm                     dc  00  04  CL1G  04:19   OPEN-9           00040898
/dev/sdf                     c6  00  05  CL2G  04:1a   OPEN-9           00040898
/dev/sdn                     dc  00  05  CL1G  04:1a   OPEN-9           00040898
/dev/sdg                     c6  00  06  CL2G  04:1b   OPEN-9           00040898
/dev/sdo                     dc  00  06  CL1G  04:1b   OPEN-9           00040898
/dev/sdh                     c6  00  07  CL2G  04:1c   OPEN-9           00040898
/dev/sdp                     dc  00  07  CL1G  04:1c   OPEN-9           00040898

from here:

would I fdisk the devices, then create the raidtab file, then mkraid, then add them to create the ocfs filesystem, then mount then, then add them to the fstab and it's done?

Is this even supported? The main reason for all of this is that I see a couple of conflicting comments on this: don't use raid or lvm on RAC? or yes you can?

Any insights?

Thanks.