[linux-lvm] vgchange doesn't activate the logical volume

[Daniel Loney]

The device in question is /dev/sdb.  At the end of the vgdisplay that I 
included you can see that the physical
volume is /dev/sdb.  sda is a volumn that doesn't exist and should be 
disregarded.  Sorry about the confusion.

Danny


----- Original Message ----- 
From: "Dieter Stüken" <stueken at conterra.de>
To: "LVM general discussion and development" <linux-lvm at redhat.com>
Sent: Wednesday, June 21, 2006 10:42 AM
Subject: Re: [linux-lvm] vgchange doesn't activate the logical volume


> Daniel Loney wrote:
>> suse01:~ # vgdisplay -v vg02| more
>>     Using volume group(s) on command line
>>     Finding volume group "vg02"
>>   /dev/sda: read failed after 0 of 4096 at 0: Input/output error
>
> looks like a bad sector/read error on /dev/sda.
> You may verify this either by a simple
>
> dd if=/dev/sda of=/dev/null bs=512 iflag=direct
>
> to find the bad sectors number. Or you may run
> "badblocks -s /dev/sda", which does roughly the same.
>
> I strongly suggest to use smartctl to monitor the state of your
> disk (see http://smartmontools.sourceforge.net). Most problems
> show up here some time before your disk finally dies.
>
> Try "smartctl -d ata -a /dev/sda" to display the disks error log.
> If you did not use it before, you might have to enable it by:
> "smartctl -d ata -s on /dev/sda".
>
> All disks have spare sectors they can use, if some sector gets broken
> But the sector is not automatically replaced, as most people believe.
> This does not happen until some new data is written to that sector.
> If your bad sector occurs within the LVM metadata description of /dev/sda
> you may recover it by using "vgcfgrestore" to repair the broken LVM 
> header.
>
> I did not use vgcfgrestore before, so I can't describe the necessary steps
> in detail. May be someone else can help here...
>
> Dieter.
>
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> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
> 
  
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