[DRBD-user] Does DRBD 8 use more space for meta data than DRBD 0.7?
jjohndu at gmail.com
Thu Jan 29 17:54:53 CET 2009
Lars Ellenberg wrote:
> please do not hijack threads.
> On Wed, Jan 28, 2009 at 08:51:02AM -0800, John Du wrote:
>> I am trying to upgrade DRBD 0.7 to 8.3.0. When running "drbdadm
>> create-md", I get an exit code 40 indicating there is not enough space
>> on the disk used for DRBD to store the meta data. My question is why
>> DRBD 0.7 has enough space on the same disk but DRBD 8 does not?
> probably because drbd 0.7 just was not paranoid enough,
> and did not have so many sanity checks.
> we added those sanity checks,
> because people kept shooting themselves in the foot.
> show us the exact message you get from create-md.
> is it "internal" or "external" meta data?
> what exactly is the size of the lower level device?
> (cat /proc/partitions)
> my guess is, without further information,
> that you created a file system on the lower level device,
> then overwrote the last few MB of it with "internal" drbd meta data.
Thanks for the information: DRBD 8 cannot convert all the existing 0.7
devices without losing the existing data or adding an external meta data
Yes. The DRBD device with internal meta data was built on an existing
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