[clue] Ack! (recovering busted disks - (fixed)

[Charles Burton]

If you want you can also add compression:

dump -0u -f - /home/mbean | gzip > /mnt/mbean.dump.gz

On Tue, Apr 26, 2016 at 8:16 PM, Charles Burton <charles.d.burton at gmail.com>
wrote:

> I just verified that it works fine on LVM.  It should look like this:
>
> dump -0u -f /mnt/mbean.dump /home/mbean
>
> The /mnt/mbean.dump is the destination file to dump to.  The /home/mbean
> is filesystem you wish to dump from.
>
> On Tue, Apr 26, 2016 at 8:10 PM, Mike Bean <beandaemon at gmail.com> wrote:
>
>> Sure looks that way.  Works on physical devices, didn't seem to care for
>> my syntax.   It's dump -0u -f (destination) (source)?
>>
>>
>>
>> On Tue, Apr 26, 2016 at 2:08 PM, Charles Burton <
>> charles.d.burton at gmail.com> wrote:
>>
>>> It doesn't work quite like you're thinking.  Dump doesn't care about
>>> LVM, not at least as far as I know.  Try:
>>>
>>> dump -0u -f /mnt/mbean /home/mbean
>>>
>>> On Tue, Apr 26, 2016 at 8:04 PM, Mike Bean <beandaemon at gmail.com> wrote:
>>>
>>>> Thanks for the tip.   At least at first blush it looks like I can't use
>>>> dump and restore.   They only work on devices and not on logical volumes.
>>>> At least not on my logical volumes (I'm getting bad magic number in
>>>> super-block.)   I think I'm going to play with it a  little while longer,
>>>> see if I can figure out if it really can't handle or if I'm just PEBKAC.
>>>> Could also be this box.  I'm testing it on a box that I don't really care
>>>> if it breaks
>>>>
>>>> dump -0u -f /mnt/mbean /dev/mapper/rootvg-homelv
>>>>   DUMP: Date of this level 0 dump: Tue Apr 26 14:00:16 2016
>>>>   DUMP: Dumping /dev/mapper/rootvg-homelv (/home) to /mnt/mbean
>>>> /dev/mapper/rootvg-homelv: Bad magic number in super-block while
>>>> opening filesystem
>>>>   DUMP: The ENTIRE dump is aborted.
>>>>
>>>> Mike B
>>>>
>>>> On Mon, Apr 25, 2016 at 12:34 PM, Chris Fedde <chris at fedde.us> wrote:
>>>>
>>>>> I say this every time backups get mentioned but I have to say it
>>>>> again.  I like dump.  Dump and restore are a perfect set of tools that
>>>>> solve the backup problem neatly and flexibly.  And so far have not let me
>>>>> down for either fat finger recovery or for full disk recovery.
>>>>>
>>>>> I find it silly that this tool that is integrated with the OS and woks
>>>>> so well is overlooked by everyone. Even by the certification folks.
>>>>>
>>>>> Let me say it again.  I like dump. Maybe I need to write up a blog
>>>>> article or something.
>>>>> On Apr 19, 2016 6:33 PM, "Mike Bean" <beandaemon at gmail.com> wrote:
>>>>>
>>>>>> Yeah, I know ; )
>>>>>>
>>>>>> Mike B
>>>>>>
>>>>>> On Tue, Apr 19, 2016 at 3:49 PM, David L. Anselmi <anselmi at anselmi.us
>>>>>> > wrote:
>>>>>>
>>>>>>> Mike Bean wrote:
>>>>>>> > Theorhetically yes, and we did that, but as predicted, since I #1
>>>>>>> noticed
>>>>>>> > the box was down and #2 attempted to fix it, I therefore have
>>>>>>> ownership of
>>>>>>> > it now.   Have to look into a cheap scale able method to get
>>>>>>> actual backups
>>>>>>> > and stop depending on snap shots.   I suppose I could just back it
>>>>>>> up.  But
>>>>>>> > it's only a matter of time before someone notices the Jenkins box
>>>>>>> has
>>>>>>> > backups and complains that all the other boxes don't.
>>>>>>>
>>>>>>> You need to get a new job. Life's too short...
>>>>>>>
>>>>>>> And for everyone else, this is an example why you vote against
>>>>>>> whatever the government wants to
>>>>>>> spend money on.
>>>>>>>
>>>>>>> Dave
>>>>>>> _______________________________________________
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>>>>>>
>>>>>>
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>>>>>
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>>>>
>>>>
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