lvremove: Can't get minor number of LVOL

[Billa-User]

hello,

i tried to remove a LVOL, but i got following error:

lvremove: Can't get minor number of logical volume "/dev/vgatvmovp_db1/OVOP_opc_6_00".

i saw also, the Raw Device doesn't exists.

i don't know, how to remove the LVOL ?

regards,Tom

[BrianDoyle · Accepted solution]

This situation has happened to me last year.
But I would ask other members to confirm this method/suggest changes before trying it :)

Make sure the lvol is unmounted.
You should create the block and character device files:
Do ll /dev/vg*/group to see the list of minor numbers currently in use. Choose the next one in sequence. e.g. 0x040001
mknod /dev/vgXXX/lvol1 b 64 0x040001
mknod /dev/vgXXX/rlvol1 c 64 0x040001

(each lvol has a block (b)and char(c) device)

View with "lvdisplay /dev/vgXXX/lvol1"
If both lvol's are accessable you can then you can look at removing the lvol's using lvremove command:

lvremove /dev/vgXXX/lvol1

I again would wait for others to comment on this BEFORE implementing Tom.
rgds,
Brian

[Andrew Young_2]

Hi Tom

I would go with what Brian says.

Just two notes. To find the minor number of the logical volume run the following:

strings /etc/lvmconf/vgatvmovp_db1.mapfile

to pick up the logical volume number.

Also remember that the minor number is in hexidecimal so the 10th lvol will show up as 10 but when running mknod it will be 0xYY000a where YY is your major number.

HTH

Andrew Y

[Mridul Shrivastava]

do you have block device for this lvol ?? If yes that you could create the raw device using the same major and minor no.'s , just change the b with c as mentioned above.

After doing this you should be able to remove the lvol.

[Billa-User]

hello,

i made the steps of brian and it works. thank's a lot for your helpful informations.

kind regards,Tom

[Billa-User]

i made the steps of brian and it works. thank's a lot for your helpful informations.