[linux-lvm] Can't mount LVM RAID5 drives

Zdenek Kabelac zdenek.kabelac at gmail.com
Wed Apr 23 07:59:54 UTC 2014

Dne 22.4.2014 20:43, Ryan Davis napsal(a):
> Hi Peter,
> Thanks for the support.
> Everything ran smooth until I did a fsck on the FS on the LV.  It's
> complaining about a bad superblock

Saying something runs smooth here is somewhat pointless...

Looking at your lvmdump  --

pv0 {
			id = "8D67bX-xg4s-QRy1-4E8n-XfiR-0C2r-Oi1Blf"
			device = "/dev/sdc1"	# Hint only

			status = ["ALLOCATABLE"]
			flags = []
			dev_size = 7812456381	# 3.63796 Terabytes
			pe_start = 384
			pe_count = 953668	# 3.63795

This is how your PV was looking when you have created your VG.

Obviously your device  /dev/sdc1  had   7812456381 sectors.
(Very strange to have odd number here....)

Later you report # blockdev --getsz /dev/sdc1 as 7812441596

So we MUST start from the moment you tell us what you did to your
system that suddenly your device is 14785 blocks shorter (~8MB) ?

Have you reconfigured your  /dev/sdc device?
Is it HW raid5 device ?
Have you repartitioned/resized  it  (fdisk,gparted) ?

We can't move forward without knowing exact roots of your problem ?

Everything else is pointless waste of time since we will just try to hunt
some random piece of information?

I just hope you have not tried to play directly with your /dev/sdc  device
(Since in some emails it seems you try to execute various command directly on 
this device)


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