Ahoj,
prosim linuxare o radu. Pocitac s OS CentOS 5.4, dva systemove disky v SW RAID1 a 4 datove disky na radici Adaptec 2420SA. Problemy zacaly po havarii jednoho ze 4 disku v RAIDu na radici Adaptec 2420SA. Po teto havarii doslo k posunuti poradi disku, takze grub hledal system tam, kde nebyl. Nicmene ani pote, co jsou systemove disky detekovany korektne (odpovidaji grubu), tak system nenabootuje, skonci to uvedenou hlaskou:

Volume Group "VolGroup00" not found
Could not find filesystem /dev/root
Kernel panic - not syncing...

root@sysresccd /mnt/sda1/grub % vgdisplay
--- Volume group ---
VG Name VolGroup00
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 4
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 3
Open LV 1
Max PV 0
Cur PV 1
Act PV 1
VG Size 147.94 GiB
PE Size 32.00 MiB
Total PE 4734
Alloc PE / Size 4734 / 147.94 GiB
Free PE / Size 0 / 0
VG UUID b120DU-FcFe-wpvg-BUZX-wxUa-DP1o-qxq05T

root@sysresccd /root %dmesg | grep md
[ 30.390821] md: multipath personality registered for level -4
[ 30.392692] md: raid0 personality registered for level 0
[ 30.394852] md: raid1 personality registered for level 1
[ 30.575092] md: raid6 personality registered for level 6
[ 30.575096] md: raid5 personality registered for level 5
[ 30.575099] md: raid4 personality registered for level 4
[ 30.580932] md: raid10 personality registered for level 10
[ 30.619327] md: md127 stopped.
[ 30.621176] md: bind<sdb3>
[ 30.621329] md: bind<sda3>
[ 30.623851] md/raid1:md127: active with 2 out of 2 mirrors
[ 30.623882] md127: detected capacity change from 0 to 158854742016
[ 30.630221] md127: unknown partition table
[ 67.733595] md: Autodetecting RAID arrays.
[ 67.733607] md: could not open unknown-block(8,3).
[ 67.733613] md: could not open unknown-block(8,19).
[ 67.733616] md: Scanned 2 and added 0 devices.
[ 67.733618] md: autorun ...

root@sysresccd /root % fdisk -l
Disk /dev/sda: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders, total 312581808 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00076542

Device Boot Start End Blocks Id System
/dev/sda1 * 63 208844 104391 83 Linux
/dev/sda2 208845 2313359 1052257+ 82 Linux swap / Solaris
/dev/sda3 2313360 312576704 155131672+ fd Linux raid autodetect

Disk /dev/sdb: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders, total 312581808 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0004d3a6
[quote]

Device Boot Start End Blocks Id System
/dev/sdb1 * 63 208844 104391 83 Linux
/dev/sdb2 208845 2313359 1052257+ 82 Linux swap / Solaris
/dev/sdb3 2313360 312576704 155131672+ fd Linux raid autodetect

Disk /dev/md127: 158.9 GB, 158854742016 bytes
2 heads, 4 sectors/track, 38782896 cylinders, total 310263168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/md127 doesn't contain a valid partition table

Disk /dev/mapper/VolGroup00-LogVol00: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders, total 41943040 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/mapper/VolGroup00-LogVol00 doesn't contain a valid partition table

Disk /dev/mapper/VolGroup00-LogVol02: 126.6 GB, 126634426368 bytes
255 heads, 63 sectors/track, 15395 cylinders, total 247332864 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/mapper/VolGroup00-LogVol02 doesn't contain a valid partition table

Disk /dev/mapper/VolGroup00-LogVol01: 10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 cylinders, total 20971520 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/mapper/VolGroup00-LogVol01 doesn't contain a valid partition table

root@sysresccd /root % cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md127 : active raid1 sda3[0] sdb3[1]
155131584 blocks [2/2] [UU]

unused devices: <none>

root@sysresccd /mnt/sda1/grub % cat grub.conf
default=0
#fallback=1
timeout=10
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title CentOS (2.6.18-164.11.1.el5)
root (hd0,0)
kernel /vmlinuz-2.6.18-164.11.1.el5 ro root=/dev/VolGroup00/LogVol00 rhgb
initrd /initrd-2.6.18-164.11.1.el5.img
title CentOS (2.6.18-8.1.14.el5)
root (hd0,0)
kernel /vmlinuz-2.6.18-8.1.14.el5 ro root=/dev/VolGroup00/LogVol00 rhgb
initrd /initrd-2.6.18-8.1.14.el5.img
title CentOS (2.6.18-8.1.14.el5) hd1
root (hd1,0)
kernel /vmlinuz-2.6.18-8.1.14.el5 ro root=/dev/VolGroup00/LogVol00 rhgb quiet
initrd /initrd-2.6.18-8.1.14.el5.img

root@sysresccd /mnt/sda1/grub % cat device.map
# this device map was generated by anaconda
(hd0) /dev/sda
(hd1) /dev/sdb
#(hd2) /dev/sdc
#(hd3) /dev/sdd