From: more <more0401@sina.com>
To: linux-lvm@sistina.com
Subject: Re: [linux-lvm] Unable to mount snapshot
Date: Fri Dec 19 01:19:02 2003 [thread overview]
Message-ID: <3FE2A609.9050401@sina.com> (raw)
In-Reply-To: <3FE1E518.3010601@netscape.net>
Hi, John,
You should use "-onouuid,ro" as parameter for mount snapshot volume.
John Craig wrote:
> Hi,
>
> I successfully created a snapshot of an active LV with XFS filesystem,
> and ldisplay shows it to be operating correctly. However, when I try
> to mount the snapshot, it says "wrong fs type, bad option, bad
> superblock on /dev/system/snap or too many mounted file systems"
>
> Can anyone help, or shed some light on why this is happening? Is there
> a workaround?
>
> The mount command was "mount -t xfs -o ro /dev/system/snap /mnt/snap"
>
> I am running SuSE 9.0 on x86-64, with kernel 2.4.21-149, lvm version
> 1.0.7(mp-v6). I have a volume group running on 3 raid arrays, each 0.9
> TB, for a total of 2.7 TB. It has 2 active LVs, one of them 2 TB, and
> the other 500GB, leaving about 249GB unallocated. I created the
> snapshot with:
>
> lvcreate -L 200G -s -n snap /dev/system/adsdata
>
> As I said, the snapshot seems to be working correctly, but when I
> bring up the LVM tool in YAST, it shows the original LV, with capacity
> 1.9 TB, mounted, and the snapshot with a capacity of 1.9TB,
> unmounted. When I try to set the mount point for the snapshot, it says
> the capacity is wrong, it needs to be <= 249GB. In other words, it
> seems to be treating it as if it were a regular LV, not a snapshot..
>
> The listing of lvdisplay is:
> --- Logical volume ---
> LV Name /dev/system/snap
> VG Name system
> LV Write Access read only
> LV snapshot status active destination for /dev/system/adsdata
> LV Status available
> LV # 3
> # open 0
> LV Size 2 TB
> Current LE 16383
> Allocated LE 16383
> snapshot chunk size 64 KB
> Allocated to snapshot 16.66% [33.29 GB/199.90 GB]
> Allocated to COW-table 100 MB
> Allocation next free
> Read ahead sectors 1024
> Block device 58:2
>
>
>
>
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@sistina.com
> http://lists.sistina.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
>
>
>
next prev parent reply other threads:[~2003-12-19 1:19 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-12-18 11:36 [linux-lvm] Unable to mount snapshot John Craig
2003-12-19 1:19 ` more [this message]
-- strict thread matches above, loose matches on Subject: below --
2003-12-18 12:08 Little, Chris
2003-12-19 4:10 ` Heinz J . Mauelshagen
2003-12-19 9:18 Little, Chris
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