I have a server running OpenSuSE 10.3 using dm-raid with two identical 320 GB SATA disks, /dev/sda and /dev/sdb with 11 partitions on each, already mounted as /dev/mapper/ddf1_mail_part1, /dev/mapper/ddf1_mail_part2, and so on using ext3 filesystems. All this was done during the initial installation so I’ve not used the dm-raid tools yet.
There is a lot of unused space on this disk so I have just added partition 12 using fdisk on each disk individually but how do I create the mapping /dev/mapper/ddf1_mail_part12 containing /dev/sda12 and /dev/sdb12?
Once I have done this, presumably I can use mke2fs to create an ext3 filesystem on it in the usual way and mount it, hopefully without rebooting the server?
Andy