Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
I moved 2 disks of 750GB each from a openSUSE-10.0_x86 to openSUSE-10.3_x86_64 without problems. The version of DRBD was in the old cluster 8.0.0 and in the new cluster 8.0.6 at that moment. I started to build the new cluster whit openSUSE-10.3-RC1, only had some SATA driver issues. On top of the /dev/drbd0 and /dev/drbd1 are 20 reiserfilesystems on LVM-volumes. I was very carefull and took several measures to safeguard my data by making backup's, taking at least 2 days. But it proved to work without any problem, and still does after almost 2 months i think. This is not just because i am a lucky person, but because DRBD is a mature solution ;-) In other words: thanks for this product from a happy redundant replication technology user. This does not mean that you will be lucky too, but this is my experiance / testimony ;-) Nico van der Horn Lars Ellenberg schreef: > On Tue, Nov 27, 2007 at 11:38:55PM +0100, Laurent CARON wrote: > >> 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 ? >> > > 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 > -- Behandeld door / Handled by: N.J. van der Horn (Nico) --- ICT Support Vanderhorn IT-works, www.vanderhorn.nl, Voorstraat 55, 3135 HW Vlaardingen, The Netherlands, Tel +31 10 2486060, Fax +31 10 2486061 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20071128/30febe4b/attachment.htm>