lvm problem
 

hi boys... i read you from long time but this is my first post.

i expose my problem

i'have added two physical volume /dev/c0d1p1 and /dev/c0d1p2 into a volume group VolGroup01, the second with vgextend

the problem is that my c0d1p2 partition contains a lot of data and i don't want to loose them,

now i don't know if vgreduce can help me or i have to take a different way to solve

please help me....

Did your /dev/c0d1p2 contain the data before you added it to LVM?

Hi, from the top of my head, did the disk contain any lvm partitioning prior to adding it to the new volume group. If so I would suggest you to take it out of the current volume group and do a "vgimport <volgrpname> <physicalvolname> and then do a "vgchange -ay <volgrpname>", that should be able to bring back the data you wanted safely. If you do a vgreduce you would lose that existing data.

no, my /dev/c0d1p2 does not contains any data... it's only a partition

and thank you for help all...

Alright, I'm confused.

So was I, but I thought I'd let someone else show that ;)

sorry, i was wrong... i'm a little bit confised

ok, from head...


/dev/cciss/c0d1p1 was full of data
/dev/cciss/c0d1p2 was empty

i would like to create a logical volume with lvm containing these two partitions,

i created first a volgroup and added c0d1p2 (the empty one)
than i added c0d1p1 to the volgroup with vgextend

i want a logical volume containing the two partitions without loosing data on c0d1p1

this is what i would like to do...

i'm now stopped because i'm afraid to make something wrong and i'm waiting for you...
please, help me

i want to make clear that neither /dev/cciss/c0d1p1 or /dev/cciss/c0d1p2 were part of lvm...

i'm creating a new volume group and i'm adding them to it

I don't think you can do this.
The normal sequence is

partitions /dev/cciss/c0d1p1 & /dev/cciss/c0d1p2 both set as pv (fdisk id code 8e), vgcreate + vgextend, putting both pv's into the vg, create lv from the vg and then mkfs over the lv.

http://tldp.org/HOWTO/LVM-HOWTO/
http://sunoano.name/ws/public_xhtml/lvm.html

ok, i launched vgreduce to extract c0d1p1 and now partition is not readable...

i'have launched fsck to restore the partition super block and it seems to work...

mounted with /etc/fstab line

at reboot it recognize the partition and is making a a forced check without obliging me to enter maintenance mode...

supposing it restore....

what about if a create a volgroup ----> add only /dev/cciss/c0d1p1 -----> launch parted on volgroup -----> rescue command to restore partition without data loss

what do you think about? is it possible?

i know that all data are still there because in maintenance mode, if i do

ls /dev/cciss/c0d1p1

it gives me the list of contents but doesn't give me access