Hi all! I inherited a bunch of servers with RAID arrays. I'm doing a bunch of housekeeping/cleanup, documentation, etc. In this step I want to get RAID array naming straightened out. I read the mdadm manpage for [create, build, grow] -N, --name= and I _think_ that to set an array name, and also to REname it?, I need to do sudo mdadm --assemble <array device> --name=NewName --update=OldName <array's drives> I'm a bit sketchy on the exact steps to do that though. Well, the exact steps to do that AND to NOT! screw things up! Do I have to boot from a different disk, unmounting the arrays? Disassembling them? etc? I'd like to learn how to do this right. Here's an example of what's running on one server. The OS is Opensuse. uname -a Linux arieltest.local 3.7.10-1.16-desktop #1 SMP PREEMPT Fri May 31 20:21:23 UTC 2013 (97c14ba) x86_64 x86_64 x86_64 GNU/Linux rpm -q mdadm mdadm-3.2.6-3.4.1.x86_64 Its got three arrays attached. v0.90 RAID-1 <-- "/boot" v1.00 RAID-1 <-- ROOT v1.02 RAID-10 <-- storage I can't say why these were configured that way (that admin's long gone :-( ). Once I get things all cleaned up around here, I'll start with a next-gen plan from scratch. But for the time being, this is what I'm working with. This system boots OK. The arrays report as mdadm --detail --scan ARRAY /dev/md0 metadata=0.90 UUID=xxx... ARRAY /dev/md126 metadata=1.00 name=Rescue:1 UUID=yyy... ARRAY /dev/md2 metadata=1.02 name=server:md2 UUID=zzz... mdadm -D -s ARRAY /dev/md0 metadata=0.90 UUID=xxx... ARRAY /dev/md/Rescue:1 metadata=1.0 name=Rescue:1 UUID=yyy... ARRAY /dev/md2 metadata=1.2 name=server:md2 UUID=zzz... Not sure why the devices are different between the two, or if that's a problem. The config file is cat /etc/mdadm.conf CREATE owner=root group=disk mode=0660 auto=yes DEVICE /dev/disk/by-id/ata-[DISK1]-part2 /dev/disk/by-id/[DISK2]-part2 DEVICE /dev/disk/by-id/ata-[DISK1]-part1 /dev/disk/by-id/[DISK2]-part1 DEVICE /dev/disk/by-id/ata-[DISK3]-part1 /dev/disk/by-id/ata-[DISK4]-part1 /dev/disk/by-id/ata-[DISK5]-part1 /dev/disk/by-id/ata-[DISK6]-part1 ARRAY /dev/md0 level=raid1 num-devices=2 metadata=0.90 UUID=xxx... ARRAY /dev/md1 level=raid1 num-devices=2 metadata=1.00 UUID=yyy... ARRAY /dev/md2 level=raid10 num-devices=4 metadata=1.02 name=server:md2 UUID=zzz... I want to end up with boot ARRAY, device == /dev/md0, name == server1_boot ROOT ARRAY, device == /dev/md1, name == server1_root storage ARRAY, device == /dev/md2, name == server1_storage and have mdadm --detail --scan mdadm -D -s both report a consistent story. To "get there", I need to 1st boot from another drive, right? Like a LiveCD, and -- at least -- unmount the arrays? Do I need to 'break' or disassemble them? Guess I'm looking for a little hand-holding on this once through. Thanks a lot for any help! Ariel -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
