[DRBD-user] Three way drbd

[Mark Olliver]

Hi,

Does any one have any suggestions here?

Regards

Mark


On 20 Jul 2009, at 09:24, Mark Olliver wrote:

> Hi,
>
> I just went to start to try a three way replication but upon creating
> the stacked resource on the primary i got the message below which was
> unexpected. This primary machine already has several standard drbd
> connections to another machine which are all working ok so i do not  
> want
> to effect these and it is one of these connections i am now trying to
> mirror to a third machine, but it is a live disk and i cant afford to
> lose the data. I am unsure where it is trying to create the metadata
> here for the stacked resource?
>
>
>
>
> root at eu-box9:~# drbdadm --stacked create-md therm1-U
> md_offset 42951020544
> al_offset 42950987776
> bm_offset 42949672960
>
> Found ext3 filesystem which uses 41943040 kB
> current configuration leaves usable 41943040 kB
>
> Even though it looks like this would place the new meta data into
> unused space, you still need to confirm, as this is only a guess.
>
> Do you want to proceed?
> [need to type 'yes' to confirm] no
>
> Operation cancelled.
>
> Section from drbd.conf
>
> resource therm1 {
>  on eu-box9.xxx.com { device /dev/drbd2; disk /dev/sda8; address
> x.x.203.101:7790; meta-disk internal; }
>  on eu-box10.xxx.com { device /dev/drbd2; disk /dev/sda8; address
> x.x.203.104:7790; meta-disk internal; }
> }
>
> resource therm1-U {
>  stacked-on-top-of therm1 { device /dev/drbd12; address
> x.x.203.101:7800; }
>  on usa-box1.xxx.com { device /dev/drbd12; disk /dev/sda8; address
> 1x.x.203.112:800; meta-disk internal; }
> }
>
>
> Thanks
>
> Mark
>
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Mark Olliver BSc (Hons) MBCS CITP FCNSA,
Thermeon (Systems Admin)
Russ Hill Farm, Russ Hill, Charlwood, Surrey, RH6 0EL, UK
E. mark at thermeon.com
M. +44 79 20 062 647