From: Milan Broz <mbroz@redhat.com>
To: LVM general discussion and development <linux-lvm@redhat.com>
Subject: Re: [linux-lvm] F7 will not boot after running backup w/snapshot
Date: Wed, 30 Apr 2008 23:19:30 +0200 [thread overview]
Message-ID: <4818E262.4070105@redhat.com> (raw)
In-Reply-To: <4818D59A.8020906@verizon.net>
Gerry Reno wrote:
> Charles,
> Here's a snapshot ramdisk reference:
>
> http://linuxsoftware.co.nz/blog/2008/03/11/lvm-snapshot-with-no-free-diskspace
>
> The ramdisk has been working without problem. I tested it quite a bit
> before putting it into production. But I don't know LVM internals so I
> cannot say whether it could have had anything to do with the hang that
> occurred.
Please, do *not* use this configuration, it is very dangerous!
Note that you extend Volume Group on you physical disk with another PV
in volatile memory.
Now imagine that your system crash (oh, wait, it happened already!)
After reboot you have no ramdisk, and the Volume Group is incomplete
(because you didn't removed PV on ramdisk).
If there is only snapshot, you can recover it, if some operation placed
here part of another volume, you will lose data.
If there is root volume, system will not boot. Period.
Milan
--
mbroz@redhat.com
next prev parent reply other threads:[~2008-04-30 21:19 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-30 0:53 [linux-lvm] F7 will not boot after running backup w/snapshot Gerry Reno
2008-04-30 2:29 ` Gerry Reno
2008-04-30 3:51 ` Gerry Reno
2008-04-30 14:00 ` Gerry Reno
2008-04-30 15:09 ` Larry Dickson
2008-04-30 17:23 ` Gerry Reno
2008-04-30 18:19 ` Gerry Reno
2008-04-30 18:28 ` Charles Marcus
2008-04-30 20:24 ` Gerry Reno
2008-04-30 21:19 ` Milan Broz [this message]
2008-04-30 22:30 ` Gerry Reno
2008-05-01 15:48 ` malahal
2008-05-01 16:30 ` Mikulas Patocka
2008-05-01 18:15 ` Gerry Reno
2008-05-01 18:38 ` Charles Marcus
2008-05-01 19:37 ` Gerry Reno
2008-05-01 19:42 ` Charles Marcus
2008-05-01 19:53 ` Gerry Reno
2008-05-01 20:03 ` Charles Marcus
2008-05-01 20:21 ` Gerry Reno
2008-05-01 20:25 ` Alasdair G Kergon
2008-05-01 20:30 ` Gerry Reno
2008-05-01 20:34 ` Charles Marcus
2008-05-01 20:36 ` Gerry Reno
2008-05-01 20:44 ` Charles Marcus
2008-05-01 20:57 ` Gerry Reno
2008-05-01 21:59 ` Alasdair G Kergon
2008-05-01 22:12 ` Gerry Reno
2008-05-01 23:50 ` Gerry Reno
2008-05-02 0:38 ` Stuart D. Gathman
2008-05-02 0:47 ` Stuart D. Gathman
2008-05-02 2:03 ` Gerry Reno
2008-05-02 8:14 ` Marek Podmaka
2008-05-02 14:00 ` Gerry Reno
2008-05-02 14:14 ` Charles Marcus
2008-05-02 14:25 ` Larry Dickson
2008-05-02 14:45 ` Marek Podmaka
2008-05-02 14:38 ` Stuart D. Gathman
2008-05-02 14:47 ` Bryn M. Reeves
2008-05-02 15:05 ` Marek Podmaka
2008-05-02 15:17 ` Stuart D. Gathman
2008-05-02 15:30 ` Gerry Reno
2008-05-02 15:36 ` Bryn M. Reeves
2008-05-03 2:27 ` Mikulas Patocka
2008-05-04 0:45 ` [linux-lvm] Temporary shapshots Stuart D. Gathman
2008-05-05 14:30 ` Larry Dickson
2008-05-05 14:45 ` Charles Marcus
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