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List: netatalk
Subject: Re: [Netatalk-admins] Backup compatibility ?
From: Matt Connolly <matt.connolly.au () gmail ! com>
Date: 2011-07-29 23:52:09
Message-ID: F3038918-50A4-4E94-ACD1-450172B6B606 () gmail ! com
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On 30/07/2011, at 9:20 AM, wch wrote:
> I transitioned from OS 10.6 to 10.7, and also switched from netatalk 2.0 to \
> 2.2beta4 at the same time. After I made some tweaks to the config files, everything \
> worked fine.
I haven't upgraded my main system yet, but I'm used Lion on an external drive for \
testing with 2.2 without any issues.
>
> However, after a few weeks, I had some sort of corruption to the TIme Machine \
> sparsebundle. It said, "Time Machine completed a verification of your backups. To \
> improve reliability, Time Machine must create a new backup for you." I searched \
> around, and I think this means the disk image had some corruption. I don't think \
> this is was directly related to the upgrades, though. My backups have been kind of \
> slow and weird for a couple months; I think it has something to do with \
> disconnecting the computer from the network or putting it to sleep in the middle of \
> backups. After creating the new backup, everything seems to be fine.
I've had something similar happen about 3 or 4 times. I'm on a ZFS filesystem and I \
make regular snapshots, so I've just rolled back to a previous snapshot, run `dbd -r` \
and then it's been fine again. Snapshots are awesome, saved me from having to start a \
new backup every time :)
>
> The way that Time Machine does network backups, with a disk image, has never been \
> robust for me. Over the years I've had to start over with new backups maybe 2 or 3 \
> times.
>
> I also created my previous disk image sparsebundles by hand. I did this so I could \
> set a size limit, so that the backups wouldn't grow to take up my whole disk. But \
> this time I realized I could use the "volsizelimit" setting in my \
> AppleVolumes.default to limit the size instead, and so I could let OS X make the \
> sparsebundle automatically. The line looks something like this (it sets the size to \
> 200GB):
> /mnt/TMShare "TMShare" options:usedots,upriv,tm ea:ad volsizelimit:200000
>
>
>
>
> On Fri, Jul 29, 2011 at 11:31 AM, carbncl <carbncl@gmail.com> wrote:
> I would say that Lion will handle the Snow Leopard backups and just produce a "big" \
> (10~20GB) backup after the OS upgrade. At least that what happened to me. (with \
> netatalk 2.1 then 2.2, netatalk doesn't really affect how time machine works \
> anyway)
> But I had an issue, Lion was fully indexing the backup file at each backup... A \
> 10MB backup was taking ~2h... I guess that issue was just for me because of my \
> sparsebundle created "by hand" not being fully supported. Tried many things, to \
> finally give up and just start over with a fresh new backup, now that works \
> perfectly.
> I would suggest to give a look at OSX system.log the first times just to check for \
> errors. And if you are really paranoid, backup your backups before :)
>
> Vincent.
>
> Le 29 juil. 2011 à 18:00, Djailla a écrit :
>
> > Hello folks
> >
> > Great job for the netatalk compatibility with Lion :)
> >
> > I have some question about backup compatibility when updating Mac OS or netatalk \
> > version. I would like to keep my TimeMachine history after update. So here are \
> > the 2 question :
> > - Are the TimeMachine backups made with netatalk 2.1.3 with MAC OS 10.6 still \
> > readable with MAC OS 10.6 after updating netatalk to 2.2.0 ?
> > - Are the TimeMachine backups made with netatalk 2.2.0 with 10.6.X (Snow Leo) \
> > usable after updating system to MAC OS 10.7.X ?
> > Best regards
> >
> > Djailla
> > ------------------------------------------------------------------------------
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>
>
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[Attachment #5 (unknown)]
<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; \
-webkit-line-break: after-white-space; "><br><div><div>On 30/07/2011, at 9:20 AM, wch \
wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">I \
transitioned from OS 10.6 to 10.7, and also switched from netatalk 2.0 to 2.2beta4 at \
the same time. After I made some tweaks to the config files, everything worked \
fine.</blockquote><div><br></div><div>I haven't upgraded my main system yet, but I'm \
used Lion on an external drive for testing with 2.2 without any \
issues.</div><div><br></div><div><br></div><blockquote \
type="cite"><div><div><br></div><div>However, after a few weeks, I had some sort of \
corruption to the TIme Machine sparsebundle. It said, "Time Machine completed a \
verification of your backups. To improve reliability, Time Machine must create a new \
backup for you." I searched around, and I think this means the disk image had some \
corruption. I don't think this is was directly related to the upgrades, though. \
My backups have been kind of slow and weird for a couple months; I think it has \
something to do with disconnecting the computer from the network or putting it to \
sleep in the middle of backups. After creating the new backup, everything seems \
to be fine.</div></div></blockquote><div><br></div>I've had something similar happen \
about 3 or 4 times. I'm on a ZFS filesystem and I make regular snapshots, so I've \
just rolled back to a previous snapshot, run `dbd -r` and then it's been fine again. \
Snapshots are awesome, saved me from having to start a new backup every time \
:)</div><div><br></div><div><br></div><div><blockquote type="cite"><div>
<div><br></div><div>The way that Time Machine does network backups, with a disk \
image, has never been robust for me. Over the years I've had to start over with new \
backups maybe 2 or 3 times.</div><meta charset="utf-8"><div>
<div><br></div><div><br></div><div>I also created my previous disk image \
sparsebundles by hand. I did this so I could set a size limit, so that the backups \
wouldn't grow to take up my whole disk. But this time I realized I could use the \
"volsizelimit" setting in my AppleVolumes.default to limit the size instead, and so I \
could let OS X make the sparsebundle automatically. The line looks something like \
this (it sets the size to 200GB):</div>
<div><div style="background-color: transparent; font-family: Times; font-size: \
medium; "><span id="internal-source-marker_0.5106188596691936" style="font-size: \
10pt; font-family: 'Courier New'; color: rgb(0, 0, 0); background-color: transparent; \
font-weight: normal; font-style: normal; font-variant: normal; text-decoration: none; \
vertical-align: baseline; white-space: pre-wrap; ">/mnt/TMShare "TMShare" \
options:usedots,upriv,tm ea:ad volsizelimit:200000</span></div>
</div><div><br></div><div><br></div><div><br></div><div><br><div \
class="gmail_quote">On Fri, Jul 29, 2011 at 11:31 AM, carbncl <span dir="ltr"><<a \
href="mailto:carbncl@gmail.com">carbncl@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc \
solid;padding-left:1ex;">I would say that Lion will handle the Snow Leopard backups \
and just produce a "big" (10~20GB) backup after the OS upgrade.<br>
At least that what happened to me. (with netatalk 2.1 then 2.2, netatalk doesn't \
really affect how time machine works anyway)<br> <br>
But I had an issue, Lion was fully indexing the backup file at each backup... A 10MB \
backup was taking ~2h...<br> I guess that issue was just for me because of my \
sparsebundle created "by hand" not being fully supported.<br> Tried many things, to \
finally give up and just start over with a fresh new backup, now that works \
perfectly.<br> <br>
I would suggest to give a look at OSX system.log the first times just to check for \
errors.<br> And if you are really paranoid, backup your backups before :)<br>
<br>
Vincent.<br>
<br>
Le 29 juil. 2011 à 18:00, Djailla a écrit :<br>
<div><div></div><div class="h5"><br>
> Hello folks<br>
><br>
> Great job for the netatalk compatibility with Lion :)<br>
><br>
> I have some question about backup compatibility when updating Mac OS or netatalk \
version. I would like to keep my TimeMachine history after update. So here are the 2 \
question :<br> ><br>
> - Are the TimeMachine backups made with netatalk 2.1.3 with MAC OS 10.6 still \
readable with MAC OS 10.6 after updating netatalk to 2.2.0 ?<br> > - Are the \
TimeMachine backups made with netatalk 2.2.0 with 10.6.X (Snow Leo) usable after \
updating system to MAC OS 10.7.X ?<br> ><br>
> Best regards<br>
><br>
> Djailla<br>
</div></div>> ------------------------------------------------------------------------------<br>
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target="_blank">http://p.sf.net/sfu/slashdot-survey_______________________________________________</a><br>
> Netatalk-admins mailing list<br>
> <a href="mailto:Netatalk-admins@lists.sourceforge.net">Netatalk-admins@lists.sourceforge.net</a><br>
> <a href="https://lists.sourceforge.net/lists/listinfo/netatalk-admins" \
target="_blank">https://lists.sourceforge.net/lists/listinfo/netatalk-admins</a><br> \
<br> <br>
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</blockquote></div><br></div></div></div>
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