[SOLVED] can't mount root filesystem after partion change

reg.doug · 05-25-2010, 11:57 AM

I am a linux semi-noob who just got the idea that it would be fun to play with Arch Linux. I was dual-booting Windows and OpenSuSE, and I installed Arch by shrinking the Windows partition and putting a new logical partition in between the windows partition and the swap partition I already have.

My disk setup:

Code:

/dev/sda1:   DellUtility (vfat)   ??
/dev/sda2:   DellRecovery (ntfs)
/dev/sda3:   OS (ntfs)            Win7 partition
/dev/sda5:   arch root (ext3)     ArchLinux
/dev/sda6:   shared swap partion
/dev/sda7:   SHARE (ntfs)         For docs/music/etc
/dev/sda8:   opensuse root (ext4)

This changed the /(root) partition of OpenSuSE from /dev/sda7 to /dev/sda8. I edited the opensuse fstab to reflect the changes and rebooted.

Unfortunately, opensuse still thinks that its root filesystem is on /dev/sda7 so it fails to boot b/c it is looking at an ntfs filesystem that I used for document sharing.

If someone has a solution, that will save me from having to reinstall opensuse.

Thanks in advance!

brucehinrichs · 05-25-2010, 12:18 PM

Posting your /etc/fstab and /boot/grub/menu.lst or /boot/grub/grub.cfg would help us a lot.

reg.doug · 05-25-2010, 04:12 PM

Here is /boot/grub/menu.lst

Code:

# (3) OpenSuse
title openSuSE 11.2 Desktop
root (hd0,7)
kernel /boot/vmlinuz resume=/dev/sda6 splash=silent quiet showopts vga=0x3$ga=0x317
initrd /boot/initrd

# (4) OpenSuse Failsafe
title openSuSE 11.2 Failsafe
root (hd0,7)
kernel /boot/vmlinuz showopts apm=off noresume edd=off p$$=off powersaved=off nohz=off highres=off processor.max_cstate=1 x11failsafe vg$$afe vga=0x317
initrd /boot/initrd

And /etc/fstab

Code:

/dev/disk/by-id/ata-WDC_WD3200BEVT-75ZCT2_WD-WXJ0AA941525-part6 swap                 swap       defaults              0 0
/dev/disk/by-id/ata-WDC_WD3200BEVT-75ZCT2_WD-WXJ0AA941525-part8 /                    ext4       acl,user_xattr        1 1
/dev/disk/by-id/ata-WDC_WD3200BEVT-75ZCT2_WD-WXJ0AA941525-part3 /windows/C           ntfs-3g    users,gid=users,fmask=133,dmask=022,locale=en_US.UTF-8 0 0
/dev/disk/by-id/ata-WDC_WD3200BEVT-75ZCT2_WD-WXJ0AA941525-part7 /windows/Share       ntfs-3g    users,gid=users,fmask=113,dmask=002,locale=en_US.UTF-8 0 0
proc                 /proc                proc       defaults              0 0
sysfs                /sys                 sysfs      noauto                0 0
debugfs              /sys/kernel/debug    debugfs    noauto                0 0
devpts               /dev/pts             devpts     mode=0620,gid=5       0 0

The edits I mentioned were to change the "resume=" parameter in menu.lst and the number at the end of the fstab entries (e.g. ...-part7 became ...-part8)

syg00 · 05-25-2010, 05:02 PM

No "root=..." parameter to the kernel ?.
Might need to look at that initrd as well.

reg.doug · 05-25-2010, 06:15 PM

Quote:

No "root=..." parameter to the kernel ?.

Thank you, now I feel quite dumb but my system works.

nbreight · 05-31-2010, 12:55 PM

your /boot/grub/menu.lst should look like this
=================================

# (3) OpenSuse
title openSuSE 11.2 Desktop
root (hd0,8) ## replace 7 with 8
kernel /boot/vmlinuz resume=/dev/sda6 splash=silent quiet showopts vga=0x3$ga=0x317
initrd /boot/initrd

# (4) OpenSuse Failsafe
title openSuSE 11.2 Failsafe
root (hd0,8) ## replace 7 with 8
kernel /boot/vmlinuz showopts apm=off noresume edd=off p$$=off powersaved=off nohz=off highres=off processor.max_cstate=1 x11failsafe vg$$afe vga=0x317
initrd /boot/initrd

=================================
thus replacing root (hd0,7) by root (hd0,8)
hth