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Re: [linux-lvm] How to fix missmatch between VG-size and LV-size?



Hello,

If I ever get all this data back I will definitely try to either RAID it or make a backup of the most importatnt stuff on the volume.

I have now run e2fsck -n -t -v /dev/vgftp/lvftp successfully. It gave me the following output. I'm not really sure what it means, but I think it looks pretty ok. Do you think it's ok to do this for real now?

################
# e2fsck -n -t -v /dev/vgftp/lvftp
e2fsck 1.41.10 (10-Feb-2009)
/dev/vgftp/lvftp contains a file system with errors, check forced.
Pass 1: Checking inodes, blocks, and sizes

Running additional passes to resolve blocks claimed by more than one inode...
Pass 1B: Rescanning for multiply-claimed blocks
Multiply-claimed block(s) in inode 51036510: 102452460
Multiply-claimed block(s) in inode 96436268: 203786736
Multiply-claimed block(s) in inode 122208259: 244427502
Multiply-claimed block(s) in inode 195693509: 396636221
Multiply-claimed block(s) in inode 331595778: 665071629
Pass 1C: Scanning directories for inodes with multiply-claimed blocks
Pass 1D: Reconciling multiply-claimed blocks
(There are 5 inodes containing multiply-claimed blocks.)

File /XX/XXXXXXXX.XXX (inode #51036510, mod time Sun Apr 30 03:39:57 2006)
 has 1 multiply-claimed block(s), shared with 0 file(s):
Multiply-claimed blocks already reassigned or cloned.

File /XXXX/XXXXXXX.XXX (inode #96436268, mod time Sun Feb 25 19:15:11 2007)
 has 1 multiply-claimed block(s), shared with 0 file(s):
Multiply-claimed blocks already reassigned or cloned.

File /XXXX/XXXX/XX.XXX (inode #122208259, mod time Sun Jul 15 18:37:56 2007)
 has 1 multiply-claimed block(s), shared with 0 file(s):
Multiply-claimed blocks already reassigned or cloned.

File /XXX/XXXX.XXX (inode #195693509, mod time Sat Oct 18 01:00:53 2008)
 has 1 multiply-claimed block(s), shared with 0 file(s):
Multiply-claimed blocks already reassigned or cloned.

File /XX/XXX.XXX (inode #331595778, mod time Thu Mar 19 00:51:54 2009)
 has 1 multiply-claimed block(s), shared with 0 file(s):
Multiply-claimed blocks already reassigned or cloned.

Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
Block bitmap differences: -(244--268) -(98548--98572) -(164084--164108) -(229620--229644) -(295156--295180) -(819444--819468) -(884980--885004) -(1605876--1605900) -(2654452--2654476) -(4096244--4096268) -(7962868--7962892) -(11239668--11239692) +(14601899--14601923) +(14601949--14602273) -(20480244--20480268) -(23888116--23888140) -472222192 -512862958 -639323372 -933507085 -933507133
Fix? no


/dev/vgftp/lvftp: ********** WARNING: Filesystem still has errors **********


 308343 inodes used (0.06%)
  56220 non-contiguous files (18.2%)
    206 non-contiguous directories (0.1%)
        # of inodes with ind/dind/tind blocks: 247855/206685/61
1006593162 blocks used (99.57%)
      0 bad blocks
     82 large files

 290797 regular files
  17537 directories
      0 character device files
      0 block device files
      0 fifos
      0 links
      0 symbolic links (0 fast symbolic links)
      0 sockets
--------
 308334 files
Memory used: 736k/309504k (407k/330k), time: 20076.40/1223.57/795.83
I/O read: 133788MB, write: 0MB, rate: 6.66MB/s
######################

I will try to copy the most important stuff off of the volume before i try this though.

Before running resize2fs later, how do I figure the right size of the filesystem out? Without risking shrinking it too much.

Thanks
/Fredrik Skog


----- Original Message ----- From: "Ray Morris" <support bettercgi com>
To: <linux-lvm redhat com>
Sent: Wednesday, March 30, 2011 5:04 PM
Subject: Re: [linux-lvm] How to fix missmatch between VG-size and LV-size?


 Yes i sounds like it's time to fsck, then if needed
resize2fs to the proper size.  It would be best to
mount it read only only and copy whatever data copies
to be safe.  4TB is a lot of data, but then again it's
only $130 worth of consumer drives to back it up.
--
Ray Morris
support bettercgi com

Strongbox - The next generation in site security:
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On Wed, 30 Mar 2011 02:27:49 +0200
"Fredrik Skog" <fredrik skog rodang se> wrote:


----- Original Message ----- From: "Stuart D. Gathman" <stuart bmsi com>
To: "LVM general discussion and development" <linux-lvm redhat com>
Sent: Wednesday, March 30, 2011 12:14 AM
Subject: Re: [linux-lvm] How to fix missmatch between VG-size and
LV-size?

>SNIP>

>> I can run LVM commands fine now after the reboot and the output
>> from pvdisplay and lvdisplay is like i posted earlier.
>> How can i revert this in a safe way? I was thinking of just
>> removing the PV and do a vgcfgrestore to "before" the lvextend.
>> But since lvdisplay says the volume is 4.16TiB and pvdisplay says
>> 5.59TiB something is wrong? Or am I missing something?

>SNIP>

>> Is it better to do a e2fsck now?

> That is probably the only way to salvage what is left of your
> filesystem, but don't do it until we find out whether the LV is the
> old or the new size.
> I suspect the LV will be the new size, but the filesystem may still
> show the old size.  Since the resize2fs should be just adding free
> space, there may not be any data loss.  e2fsck would fix the (now
> corrupt) free space, and you can extend again.

I just added all the segments of the LV from an old backed up config
file. It adds up to 3,856TB, so I guess  you were right and i assumed
wrong. The old LV was about 3,8TB and the new is about 4,16TB or
about 400GB bigger than before as expected by lvextend -L+400G.

Also it tells me I have 1,43TiB free wich is 5,59TiB - 4,16TiB. It
also looks right.

maybe I should try an e2fsck now?

again, thanks for your time

/Fredrik Skog

>
> --
>        Stuart D. Gathman <stuart bmsi com>
>     Business Management Systems Inc.  Phone: 703 591-0911 Fax: 703
> 591-6154
> "Confutatis maledictis, flammis acribus addictis" - background song
> for a Microsoft sponsored "Where do you want to go from here?"
> commercial.
>
> _______________________________________________
> linux-lvm mailing list
> linux-lvm redhat com
> https://www.redhat.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

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