adding a bootsector to a PV destroys it ?!?
Hi list,
while I have tried to search the archive, I was obviousely to dump to find what I was looking for.
I just did (on 2.4.19 with LVM 1.0.5)
pvcreate /dev/hda4
vgcreate vg00 /dev/hda4
lvcreated ...
copy ... install ...
.
.
.
vgcfgbackup
dd if=/dev/hda of=/dev/hda4 bs=512 count=1 (*)
[ reboot ]
argl /dev/hda4 is no longer a valid PV.
doing
pvcreate /dev/hda4
vgcfgrestore -f /etc/lvmconf/vg00.conf /dev/hda4
recovered all my LVs, so I'm back in the game.
Still, just to make sure:
overwriting the first 512byte of a PV destroy it?
Thanks, and keep up the good work :-)
(*) to backup LILOs boot sector, I wanted to install (shiver) W2k
and moving lilo from MBR would allow me to recover easily.
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Still, just to make sure:
overwriting the first 512byte of a PV destroy it?
If I recall correctly, metadata is placed at the beginning of each PV, so overwriting the first 512-byte sector of it will probably render metadata unusable for LVM.
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Still, just to make sure:
overwriting the first 512byte of a PV destroy it?If I recall correctly, metadata is placed at the beginning of each PV, so overwriting the first 512-byte sector of it will probably render metadata unusable for LVM.
thought so, but still such a PV has a couple of GiBs, it might have been a good idea to keep the first 512bytes free for a bootloader
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