Converting the root filesystem to ReiserFS on LVM...

[Madison Kelly]

Hi Sergio,

   Thank you for your tip but I must be doing something wrong because it 
is still refusing to mount. When I typed '# ls -la /dev/VG00' I saw this:

# ls -la /dev/VG00/
total 124
dr-xr-xr-x   2 root     root       4096 Apr  5 11:45 .
drwxr-xr-x  22 root     root     118784 Apr  5 11:45 ..
crw-r-----   1 root     disk   109,   0 Apr  5 11:45 group
brw-rw----   1 root     disk    58,   0 Apr  5 11:45 LV00
brw-rw----   1 root     disk    58,   1 Apr  5 11:45 LV01
brw-rw----   1 root     disk    58,   2 Apr  5 11:45 LV02

   So I rebooted using the rescue disk and sure enough there was no 
'/dev/VG00'. So I 'insmod lvm-mod' (no errors) and then typed 'mknod 
LV00 b 58 0' and it created"

brw-r--r--   1 root     root    58,   0 Apr  5 12:11 LV00

   But when I tried to mount it I get:

# mount -t ext3 /dev/VG00/LV00 /mnt/oldroot
mount: Mounting /dev/VG00/LV00 on /mnt/oldroot failed: No such \
   device or address

   Any sign of what I am doing wrong? Again, thank you very much!

Madison

Sergio Salvi wrote:
> Hi!
> 
> It looks like you don't have the /dev/VG00* entries, right?
> 
> I'm not a Linux LVM expert, but as you said your kernel does support 
> LVM, just create the devices manually using mknod.
> 
> First boot with LVM working, ls -la /dev/VG00 and write down the major 
> and minor numbers, including the type of them (block devices, probably). 
> Then boot with your rescue CDs and mknod'em like this:
> 
> mknod LV00 b 111 222
> 
> Hope that helps!
> 
> []s,
> Sergio Salvi.
> 
> Madison Kelly wrote:
> 
>> Hi all,
>>
>>   I am officially stumped... I have tried two rescue discs (SysRescCD 
>> and PLD Rescue) as well and my Fedora Core 1 install disk using 'linux 
>> rescue' in an attempt to backup the FC1 root partition so that I can 
>> reformat it as ReiserFS and then restore it.
>>
>>   When I use the FC1 cd I can't unmount '/mnt/sysimage' which is seen 
>> as the LVM device '/dev/VG00/LV00', it keeps saying the device or 
>> resource is busy (despite being out of the directory and running off 
>> the CD). When I try to boot off either rescue CD 'root' isn't mounted 
>> but then I can't find the darn LVM partitions (and yes I made sure 
>> that the rescue CDs supported LVM and ReiserFS).
>>
>>   Under Fedora the devices I need to mount are on:
>>
>> /dev/VG00/LV00 = '/' (currently ext3)
>> /dev/VG00/LV01 = '/backup' (reiserfs)
>> /dev/VG00/LV02 = '/snapshot' (reiserfs)
>>
>>   Under the two rescue CDs though there is no '/dev/VG00...'. Where 
>> would I find those partitions? I tried looking under '/dev/' but the 
>> only thing relevant I could find was 
>> '/dev/ide/host0/bus0/target0/lun0/' and there was no sign of the LVM 
>> partitions (nor under variants like 'bus1', etc.).
>>
>>   Any help would be greatly appreciated!
>>
>> Madison


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