On Thu, 2007-07-05 at 15:42 -0700, Michael Mueller wrote:

Garrick Staples garrick@usc.edu wrote: On Thu, Jul 05, 2007 at 12:05:14PM -0700, Michael Mueller alleged: > <snip>

    # lvm pvscan <-- should see hdb as a PV in a VG
    # lvm vgscan
    # lvm lvscan <-- tells you the LV name that has the fs
    # lvm lvchange -a y /dev/$VGNAME/$LVNAME <-- activates the LV
    # mount /dev/$VGNAME/$LVNAME 

    Thanks for the suggestions.

    I loaded a new hdd hda with 4.3 single cd server; then i
    powered down and connected the hdb from the failed system and
    rebooted; the hdb was not found using the commands above  so i
    was not able to mount

    --
    Mike

These are done without the drive mounted. Also, pvscan -v might be useful. The fdisk -l that someone suggested will probably the first and most useful step. It will tell you whether hdb was a standard ext* or LVM partition.

<snip>

HTH -- Bill

Antonio da Silva Martins Junior asmartins@uem.br wrote: ----- "Michael Mueller" escreveu:

I have a centos 4 box i use for a file server (nfs and samba). It has two hdd: hda is for the standard install; hdb is for /export/samba/netdisk0

hda is lost - it just clicks now

i think hdb is still good

i can't figure out how i can remount the hdb disk in a new machine and retrieve the info from it; i've scanned the LVM howto and googled some LVM topics, but nothing seems to address my particular need

i was oblivious to LVM until now, so i did not save anything from the /etc dir on the hda disk

can someone help me get a clue?

Well,

I will first try to boot from the install CD/DVD on rescue mode, if it can't handle the LVM data on the HDD. I will try Ubuntu :)

Can you send more info on the partition schema for this HDD ?

Thanks for your help.

I tried the rescue mode; it only found what was on the new install of 4.3 single server cd;

i tried adding mount /dev/hdb1 /export to fstab and rebooted again; /export/samba/netdisk0 was there - but it was just an empty file - probably because of the LV structure on the disk

it seems to me that if a system is built under LVM and is comprised of multiple disks, recovery out to be quite easy; i must be missing something here; with the pre-LVM partitioning, i would just mount the /dev/hdb1 and be on my way; i am hoping there is a similarly easy way to get my disk back into a file system

-- Mike

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