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Removing a SCSI device

linux-lvm Martin Webster 2 participants 3 messages Oct 8, 2001 – Oct 10, 2001

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Martin Webster

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I want to remove an internal Zip drive (SCSI ID#2) to make way for a DVD drive. However, I have two SCSI drives set-up with LVM as follows and realise that removing the Zip drive will cause a number of problems. Here's my current configuration:

sda Hard disk 0 (boot) - ID#0
sdb Zip disk - ID#1
sdc Hard disk 1 - ID#2
cdrecorder - ID#6

/ (root) is /dev/sdc5 (reiserfs)
/boot is /dev/sda5 (ext2)
swap is /dev/sda6
Everything else is on the LVM spanning two physical volumes: one logical volume.

And here's what I plan to do:

1. Unplug the Zip drive and change SCSI ID of Hard disk 1 to ID#1
2. Boot system into single user mode: linux S root=/dev/sdb5
3. Remount root filesystem and /boot as read/write:
mount -n -o remount, rw /
mount -n -o remount, rw /boot
4. Edit /etc/lilo.conf and change instances of "sdc " to "sdb"
5. Run mk_initrd followed by LILO:
mk_initrd && /sbin/lilo
6. Re-boot

What I am uncertain of is whether this approach will work with LVM. Can any one advise?

BTW, I'm using SuSE 7.2 Professional.

TIA,

M

Signature · 3 lines
Martin Webster <[email protected]>
Registered Linux User #230322
http://homepage.ntlworld.com/spider-monkey/
#1 lore raw

Martin,

LVMs vgscan should happily find your VG in that changed configuration again and "vgchange -ay" will activate it afterwards.
BTW: there's no need to change the SCSI id of HD 1.

Regards,
Heinz -- The LVM Guy --

Quoted 28 lines · Martin Webster

I want to remove an internal Zip drive (SCSI ID#2) to make way for a DVD drive. However, I have two SCSI drives set-up with LVM as follows and realise that removing the Zip drive will cause a number of problems. Here's my current configuration:

sda Hard disk 0 (boot) - ID#0
sdb Zip disk - ID#1
sdc Hard disk 1 - ID#2
cdrecorder - ID#6

/ (root) is /dev/sdc5 (reiserfs)
/boot is /dev/sda5 (ext2)
swap is /dev/sda6
Everything else is on the LVM spanning two physical volumes: one logical volume.

And here's what I plan to do:

1. Unplug the Zip drive and change SCSI ID of Hard disk 1 to ID#1
2. Boot system into single user mode: linux S root=/dev/sdb5
3. Remount root filesystem and /boot as read/write:
mount -n -o remount, rw /
mount -n -o remount, rw /boot
4. Edit /etc/lilo.conf and change instances of "sdc " to "sdb"
5. Run mk_initrd followed by LILO:
mk_initrd && /sbin/lilo
6. Re-boot

Quoted 18 lines

What I am uncertain of is whether this approach will work with LVM. Can any one advise?

BTW, I'm using SuSE 7.2 Professional.

TIA,

M

Signature · 9 lines
Martin Webster <[email protected]>
Registered Linux User #230322
http://homepage.ntlworld.com/spider-monkey/

_______________________________________________
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*** Software bugs are stupid.
Nevertheless it needs not so stupid people to solve them ***

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

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Senior Consultant/Developer Am Sonnenhang 11
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[email protected] +49 2626 141200

                                                       FAX 924446

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#2 lore raw
Quoted 4 lines · Heinz J . Mauelshagen

LVMs vgscan should happily find your VG in that changed configuration again and "vgchange -ay" will activate it afterwards.
BTW: there's no need to change the SCSI id of HD 1.

Quoted 33 lines
Quoted 32 lines · Martin Webster

I want to remove an internal Zip drive (SCSI ID#2) to make way for a DVD drive. However, I have two SCSI drives set-up with LVM as follows and realise that removing the Zip drive will cause a number of problems. Here's my current configuration:

sda Hard disk 0 (boot) - ID#0
sdb Zip disk - ID#1
sdc Hard disk 1 - ID#2
cdrecorder - ID#6

/ (root) is /dev/sdc5 (reiserfs)
/boot is /dev/sda5 (ext2)
swap is /dev/sda6
Everything else is on the LVM spanning two physical volumes: one logical volume.

And here's what I plan to do:

1. Unplug the Zip drive and change SCSI ID of Hard disk 1 to ID#1
2. Boot system into single user mode: linux S root=/dev/sdb5
3. Remount root filesystem and /boot as read/write:
mount -n -o remount, rw /
mount -n -o remount, rw /boot
4. Edit /etc/lilo.conf and change instances of "sdc " to "sdb"
5. Run mk_initrd followed by LILO:
mk_initrd && /sbin/lilo
6. Re-boot

What I am uncertain of is whether this approach will work with LVM. Can any one advise?

BTW, I'm using SuSE 7.2 Professional.

Heinz,

Many thanks! All is well with my system now.

M

Signature · 3 lines
Martin Webster <[email protected]>
Registered Linux User #230322
http://homepage.ntlworld.com/spider-monkey/