Can I Use Loopback Devices with LVM?

deckard · March 1, 2005, 11:55pm

I've got a RedHat 9 box with LVM support in a 2.4.22 kernel. What I would like to do is take a set of empty files created with 'dd' and concatenate them into a volume group. I've done a good deal of googling, and it seems that this is something that can be done. But when I try to use 'pvcreate' with a plain file, I get this error:

pvcreate -- ERROR "pv_get_size(): ioctl" getting size of physical volume "vdisk1.dsk"

I searched for this error with Google and only found one hit which didn't get any replies other than "it should work". Any ideas why it's not working?

Perderabo · March 2, 2005, 8:35am

I would expect that to not work and your experiment proves this to be true. pvcreate needs to use ioctl's present in disk drivers.

deckard · March 3, 2005, 9:44am

That makes sense. I guess this is what I expected, but the few false leads I got in Google mislead me. Thanks.

sriram.s · March 9, 2005, 6:27am

hi dec,
pls take a note of this site and search the documntation of lvm
www.tldp.org.it really helps u..!