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I moved 2 disks of 750GB each from a openSUSE-10.0_x86 to
openSUSE-10.3_x86_64 without problems.<br>
The version of DRBD was in the old cluster 8.0.0 and in the new cluster
8.0.6 at that moment.<br>
I started to build the new cluster whit openSUSE-10.3-RC1, only had
some SATA driver issues.<br>
On top of the /dev/drbd0 and /dev/drbd1 are 20 reiserfilesystems on
LVM-volumes.<br>
I was very carefull and took several measures to safeguard my data by
making backup's, taking at least 2 days.<br>
But it proved to work without any problem, and still does after almost
2 months i think.<br>
This is not just because i am a lucky person, but because DRBD is a
mature solution ;-)<br>
In other words: thanks for this product from a happy redundant
replication technology user.<br>
This does not mean that you will be lucky too, but this is my
experiance / testimony ;-)<br>
<br>
Nico van der Horn<br>
<br>
Lars Ellenberg schreef:
<blockquote cite="mid:20071128003710.GB6588@racke.local" type="cite">
<pre wrap="">On Tue, Nov 27, 2007 at 11:38:55PM +0100, Laurent CARON wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Hi,
I'm about to migrate several DRBD servers from x32 to x64.
Will I need to re-create meta-data area, or is it compatible between 32
and 64 bit ?
Is there any known caveat about migrating that kind of setup ?
</pre>
</blockquote>
<pre wrap=""><!---->
we tried hard to be compatible between architechtures,
32/64 bit as well as endianess.
on disk meta data is architecture safe.
wire protocol is suposedly architechture safe.
but it has just recently been pointed out that our use of bitfields for
drbd internal state information exchange on the wire is not endian safe.
we used to have a test cluster pentium <-> alpha,
(only the old alpha is no longer up to it).
as long as you stay within the same endianess,
32 <-> 64 is not a problem,
so there should be no problem doing a rolling upgrade
from x86 to x86_64
</pre>
</blockquote>
<pre class="moz-signature" cols="72">--
Behandeld door / Handled by: N.J. van der Horn (Nico)
---
ICT Support Vanderhorn IT-works, <a class="moz-txt-link-abbreviated" href="http://www.vanderhorn.nl">www.vanderhorn.nl</a>,
Voorstraat 55, 3135 HW Vlaardingen, The Netherlands,
Tel +31 10 2486060, Fax +31 10 2486061</pre>
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