[DRBD-user] drbd -> disk /dev/???

Todd Denniston Todd.Denniston at ssa.crane.navy.mil
Tue Mar 14 14:47:24 CET 2006

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


mike wrote:
> I'd think it's pretty simple.
> 
> You've defined two "HOST_2" instances. Try fixing that first.
> 
> Also, I assume you can point the device to anything that a filesystem
> can sit on...

Are you sure we can use loop and network block devices as drbd lower level 
devices?  IIRC drbd on loop or nbd's can cause a lockup.

> 
> This is mine, works like a charm:
> 
> resource nfs {
>        protocol C;
>        incon-degr-cmd "echo '!DRBD! pri on incon-degr' | wall ; sleep
> 60 ; halt -f";
> 
>        disk { on-io-error panic; }
> 
>        syncer {
>                group 0;
>                rate 30M;
>        }
> 
>        on lvs01.mikehost.net {
>                device /dev/drbd0;
>                disk /dev/sda4;
>                address 192.168.1.101:7788;
>                meta-disk internal;
>        }
> 
>        on lvs02.mikehost.net {
>                device /dev/drbd0;
>                disk /dev/sda4;
>                address 192.168.1.102:7788;
>                meta-disk internal;
>       }
> }
> 
> 
> On 3/10/06, Alfredo Pagano <alfredo.pagano at gmail.com> wrote:
> 
>>Hi DRBD guru, perhaps a stupid question, but I hope that u can help me.
>>
>>This is my /etc/drbd.conf
>>
>>vm:~# more /etc/drbd.conf
>>resource drbd0 {
>>protocol C;
>>
>>startup {
>>wfc-timeout 1; # 2 minutes.
>>}
>>
>>net {
>>}
>>
>>syncer {
>>rate 100M;
>>}
>>
>>on HOST_2 {
>>device /dev/drbd0;
>>disk /dev/???;
>>address 192.168.1.200:7788;
>>meta-disk internal;
>>}
>>
>>on HOST_2 {
>>device /dev/drbd0;
>>disk /dev/???;
>>address 192.168.1.100:7788;
>>meta-disk internal;
>>}
>>}
>>
>>
>>The problem is that on my 2 machine I have a RAID 1 with :
>>
>>~# df -h
>>Filesystem            Size  Used Avail Use% Mounted on
>>/dev/md0              111G   12G   94G  11% /
>>tmpfs                1014M     0 1014M   0% /dev/shm
>>
>>so, I don't know what I must put as "disk" ; if I set /dev/md0
>>~# /etc/init.d/drbd start
>>Starting DRBD resources:    [ d0 Lower device (/dev/md0) is already mounted
>>cmd /sbin/drbdsetup /dev/drbd0 disk /dev/md0 internal -1  failed!
>>
>>if I create a new device with
>>mknod -m 777 /dev/prova b 147 0
>>
>>and set /dev/prova like disk in /etc/drbd.conf I receive
>>
>>:~# /etc/init.d/drbd start
>>Starting DRBD resources:    [ d0 Can not open lower device '/dev/prova':
>>Read-only file system
>>
>>cmd /sbin/drbdsetup /dev/drbd0 disk /dev/prova internal -1  failed!
>>
>>Any suggest, comment, (flout) ?
>>
>>Thanks in advance and best regards.
>>
>>Alfredo
>>
>>
>>_______________________________________________
>>drbd-user mailing list
>>drbd-user at lists.linbit.com
>>http://lists.linbit.com/mailman/listinfo/drbd-user
>>
> 
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> 


-- 
Todd Denniston
Crane Division, Naval Surface Warfare Center (NSWC Crane)
Harnessing the Power of Technology for the Warfighter



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