-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi! Mike Smith schrieb: > Hi, > > I've been using mdadm for over a year now and really > like the utility. > > Can someone point me to a howto type document that > shows how > to do various tasks. Like recovering a metadevice. I > suspect my situation is not unique and would probably > be > covered. > > I have a mother board with 3 sata raid controllers. > I have two drives on the first that I use for the OS > and a mirror of the OS using mirrordir. > > I have two 250GB drives on the second sata controller > and > two on the third. I have put these four drives in a > RAID5 metadevice ( /dev/md0 ) using mdadm. I then use > LVM to slice/dice md0 into the various filesystems I > need. > > I've run this way for over a year and now want to > upgrade my > OS. I have been running Mandrake 10.1, and want to > move to > Mandrivia 2006. > > My first problem is that my devices are renumbered > with the > new OS install. > > Mandrake Mandrivia > 1st Controller sda sda > sdc sdb > > 2nd Controller sdb sdc > sdd sdd > > 3rd Controller sde sde > sdf sdf > This is the reason I always use the uuid to assemble RAID devices in my initial ramdisk init script. In my initial ramdisk init script I have the following line: mdadm -v --assemble --scan --config=/mdadm.conf --run Before creating the initial ramdisk image (usually during the system installation process) I create the file mdadm.conf with the following commands: # echo "DEVICE partitions" > mdadm.conf # mdadm --examine --brief --scan --config=partitions >> mdadm.conf and put this file also in the initial ramdisk image. That way I don't have to worry about device file names as mdadm looks for the right uuid on all partitions it finds. This is a great feature of mdadm! > Originally, I created the RAID5 device using sdb, > sdd, sde, and sdf. > Under Mandrivia, I was successful in using mdadm to > assemble a > RAID5 device, but trying to mount the filesystems ( > /dev/vg1/video ) > it said they did not exist. > So, you can assemble and start your array under Madrivia. But it looks as your volume group is still not activated. This has nothing to do with mdadm. You have to use your LVM commands to do that. Try the following: # vgscan # vgchange -a y This will activate all volume groups defined with all devices active on your system. I don't know Mandrake or Mandriva so you'll have to check how you can put this commands in your boot process. To check which volume groups are activated, you can use the following command: # vgdisplay To check which logical volumes are online, run the following: # lvscan HTH - - andreas - -- Andreas Haumer | mailto:andreas@xxxxxxxxx *x Software + Systeme | http://www.xss.co.at/ Karmarschgasse 51/2/20 | Tel: +43-1-6060114-0 A-1100 Vienna, Austria | Fax: +43-1-6060114-71 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFDiXxDxJmyeGcXPhERAovNAJ95U/aWkHnhZ4QTFfEM1ihm5jdEmwCeKrgp jZSnEcZUFqVFjZtCAjkY1+Y= =/QYw -----END PGP SIGNATURE----- - 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
