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| Newer page: | version 3 | Last edited on Tuesday, July 12, 2005 7:27:22 pm | by CriggieCriggie | |
| Older page: | version 1 | Last edited on Monday, March 29, 2004 7:40:26 pm | by DanielLawson | Revert |
@@ -1,5 +1,4 @@
-
If you've ever been in the situation where you are doing a full upgrade of the disks in a server, you'll face the problem of getting the data from one set of disks to the other, without wanting to reinstall from scratch.
Here's how I'd do it:
@@ -33,10 +32,9 @@
chroot /mnt/root /bin/bash
* Make sure everything looks like its ok.
-* Reinstall your bootloader. if you are in the chroot as described above. Note that <new boot device> is just that! if you are booting off
-
+* Reinstall your bootloader. if you are in the chroot as described above. Note that <new boot device> is just that! if you are booting off a SCSI RAID array, it'll possibly be /dev/md0. If it's an IDE disk that will eventually be on /dev/hda but is currently on /dev/hde, try /dev/hde - but I can't guarantee that'll work. You might want to make a bootdisk so you can boot off that when you yank the old disks.
lilo -b <new boot device>
** If you aren't in the chroot, specify the config file
@@ -45,4 +43,14 @@
* Reboot, remove the old disks, and hopefully boot off the new ones.
+
+----
+I cheat a little when building a linux box that is primarily a server rather than a workstation. Normally a linux server has plenty of disks, and quite often more than one. So I attempt to have a completely separate root drive from any data drives. For example - a 36 Gb IDE root drive and four 275 Gb drives in a software RAID-0
+
+ belt:~# df -h
+ Filesystem Size Used Avail Use% Mounted on
+ /dev/hda1 18G 1.5G 16G 9% /
+ /dev/md0 1.1T 739G 379G 67% /backup
+
+Doing it this way means that the data drives could be moved to another box with minimal fuss, and if a data drive goes then the root drive can still boot. The root drive speed doesn't really matter once the machine is up, but the data drives do.
