Hi all,
First I would like to thank Neil for developing mdadm.
I am new to SW RAID and struggled a bit in the beginning.
Once I ditched the raid tools and used mdadm, my life became
easier. Many Thanks to Neil and the others that maintain this
effort for SW RAID on Linux.
I am still at a novice level wrt RAID. So bare with me.
I've thoroughly read "Boot+Root+Raid..." and the Software-RAID-HOWTO.
I am booting into raid (/dev/md1 in my case) just fine.
However, is it possible to have a lilo menu option to choose
which disk to boot of off? Such that I can choose my LinuxRaid
label, my Linux-hda label, or my Linux-hdc label. (see lilo.conf
below) I off course would leave LinuxRaid my default.
Also when I run lilo, get Warnings about BIOS device codes and such.
Can I safely ignore those?
Swap is one more issue. I have all partitions using RAID, except swap.
I didn't want to change the flag on the partition with fdisk from
82 to fd without checking first. This is close to finished, and I didn't
want to botch it up at the end.
Am I supposed to change it to auto-detect?
Also do I need to create my /dev/md2 (in my case) with /dev/hda2 missing?
do a 'mkswap /dev/md1', change /etc/fstab and reboot?
Here is an exhaustive look at what I have, if someone needs more,
let me know...
two 20Gig WD disks
Slackware 8.0
kernel 2.4.5
LILO 22.1
mdadm - v0.7 - 8 March 2002
fdisk -l /dev/hda /dev/hdc
=====================================================================
Disk /dev/hda: 255 heads, 63 sectors, 2434 cylinders
Units = cylinders of 16065 * 512 bytes
Device Boot Start End Blocks Id System
/dev/hda1 * 1 77 618471 fd Linux raid autodetect
/dev/hda2 78 332 2048287+ 82 Linux swap
/dev/hda3 333 587 2048287+ fd Linux raid autodetect
/dev/hda4 588 2434 14836027+ 5 Extended
/dev/hda5 588 970 3076416 fd Linux raid autodetect
/dev/hda6 971 1098 1028128+ fd Linux raid autodetect
/dev/hda7 1099 1353 2048256 fd Linux raid autodetect
/dev/hda8 1354 1481 1028128+ fd Linux raid autodetect
/dev/hda9 1482 1609 1028128+ fd Linux raid autodetect
/dev/hda10 1610 2434 6626781 fd Linux raid autodetect
Disk /dev/hdc: 255 heads, 63 sectors, 2434 cylinders
Units = cylinders of 16065 * 512 bytes
Device Boot Start End Blocks Id System
/dev/hdc1 * 1 77 618471 fd Linux raid autodetect
/dev/hdc2 78 332 2048287+ 82 Linux swap
/dev/hdc3 333 587 2048287+ fd Linux raid autodetect
/dev/hdc4 588 2434 14836027+ 5 Extended
/dev/hdc5 588 970 3076416 fd Linux raid autodetect
/dev/hdc6 971 1098 1028128+ fd Linux raid autodetect
/dev/hdc7 1099 1353 2048256 fd Linux raid autodetect
/dev/hdc8 1354 1481 1028128+ fd Linux raid autodetect
/dev/hdc9 1482 1609 1028128+ fd Linux raid autodetect
/dev/hdc10 1610 2434 6626781 fd Linux raid autodetect
=====================================================================
output of 'mdadm -D -b' for all md devices:
=====================================================================
ARRAY /dev/md1 level=raid1 disks=2 UUID=3bd090ae:48c5d5e0:942aebe1:9cd10235
ARRAY /dev/md3 level=raid1 disks=2 UUID=cb1edb5e:4597def7:725846f4:88a126e9
ARRAY /dev/md5 level=raid1 disks=2 UUID=c5da4462:8d5bdb55:2a8f275f:ca1fbe5c
ARRAY /dev/md6 level=raid1 disks=2 UUID=750ebc45:c74abad6:8a52c3b6:e1e26c51
ARRAY /dev/md7 level=raid1 disks=2 UUID=8fa15ec8:376de6d3:a4e7ac3a:148d783b
ARRAY /dev/md8 level=raid1 disks=2 UUID=2cfb8b7c:e8069247:a71b1adf:3db7e1ec
ARRAY /dev/md9 level=raid1 disks=2 UUID=28f07e88:6096ef41:003440ef:03630fcd
ARRAY /dev/md10 level=raid1 disks=2 UUID=a3b9b94d:56b2684d:58d45e31:d318bff5
=====================================================================
my /proc/mdstat file:
=====================================================================
Personalities : [linear] [raid0] [raid1] [raid5]
read_ahead 1024 sectors
md1 : active raid1 ide/host0/bus1/target0/lun0/part1[0]
ide/host0/bus0/target0/lun0/part1[1]
618368 blocks [2/2] [UU]
md3 : active raid1 ide/host0/bus1/target0/lun0/part3[0]
ide/host0/bus0/target0/lun0/part3[1]
2048192 blocks [2/2] [UU]
md5 : active raid1 ide/host0/bus1/target0/lun0/part5[0]
ide/host0/bus0/target0/lun0/part5[1]
3076352 blocks [2/2] [UU]
md6 : active raid1 ide/host0/bus1/target0/lun0/part6[0]
ide/host0/bus0/target0/lun0/part6[1]
1028032 blocks [2/2] [UU]
md7 : active raid1 ide/host0/bus1/target0/lun0/part7[0]
ide/host0/bus0/target0/lun0/part7[1]
2048192 blocks [2/2] [UU]
md8 : active raid1 ide/host0/bus1/target0/lun0/part8[0]
ide/host0/bus0/target0/lun0/part8[1]
1028032 blocks [2/2] [UU]
md9 : active raid1 ide/host0/bus1/target0/lun0/part9[0]
ide/host0/bus0/target0/lun0/part9[1]
1028032 blocks [2/2] [UU]
md10 : active raid1 ide/host0/bus1/target0/lun0/part10[0]
ide/host0/bus0/target0/lun0/part10[1]
6626688 blocks [2/2] [UU]
unused devices: <none>
=====================================================================
my lilo.conf
=====================================================================
boot=/dev/md1
lba32
install=/boot/boot-menu.b
message=/boot/boot_message.txt
menu-title="RAID Boot Menu - espresso.cgicafe.com"
prompt
timeout = 300
read-only
vga=normal
disk=/dev/hda bios=0x80 heads=255 sectors=63 cylinders=2434
disk=/dev/hdc bios=0x81 heads=255 sectors=63 cylinders=2434
partition=/dev/md1
start=63
image=/vmlinuz
root=/dev/md1
label = LinuxRaid
read-only
image=/vmlinuz
root=/dev/hda1
label = Linux-hda
read-only
image=/vmlinuz
root=/dev/hdc1
label = Linux-hdc
read-only
======================================================================
output of 'lilo -v'
======================================================================
LILO version 22.1, Copyright (C) 1992-1998 Werner Almesberger
Development beyond version 21 Copyright (C) 1999-2001 John Coffman
Released 31-Oct-2001 and compiled at 13:53:52 on Jan 14 2002.
MAX_IMAGES = 27
Warning: Int 0x13 function 8 and function 0x48 return different
head/sector geometries for BIOS drive 0x80
Warning: using BIOS device code 0x81 for RAID boot blocks
Reading boot sector from /dev/md1
Warning: /dev/md1 is not on the first disk
Merging with /boot/boot-menu.b
Mapping message file /boot/boot_message.txt
Boot image: /vmlinuz
Added LinuxRaid *
Boot image: /vmlinuz
Added Linux-hda
Boot image: /vmlinuz
Added Linux-hdc
/boot/boot.0901 exists - no backup copy made.
Writing boot sector.
The boot record of /dev/md1 has been updated.
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