Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
I was using default partitioning of centos, So I "did shrink! " the file system using · lvm vgchange --a y · e2fsck -f /dev/VolGroup00/LogVol00 · resize2fs /dev/VolGroup00/LogVol00 420G · lvm lvreduce --L420G /dev/VolGroup00/LogVol00 command in rescue mode, then I created a new lv named LogVol03 which is in VolGroup00 with size 420G I used the disk /dev/VolGroup00/LogVol03 And my problem had been solved, All createing , attaching , and syncing went well. Then I mounted /dev/drbd0 as /var/opt/axigen Here is another question, Do I have wasted my 420G space doing this? Or better, how much space should I dedicate to / (root) partition and how much for drbd0? (/dev/VolGroup00/LogVol03) for best performance? Thanks again for your replies. On 2010/10/27 12:44 ???, Felix Frank wrote: > On 10/27/2010 11:04 AM, Thomas Baumann wrote: > >> Hi, >> >> so just do what the message says: zero the metadata on the underlying >> storage: >> >> dd if=/dev/zero of=/dev/VolGroup00/LogVol00 bs=1M count=1 >> >> This should help. >> >> Best regards, >> >> Thomas. >> > Hi, > > it appears the OP would like his 900G filesystem not destroyed ;) > So no, you might not want to do that. > > From what I can see, you probably want to use external metadata. Can you > shrink one of your LV's to make room for an additional dedicated > metadata disk? Least pain that way. > > Alternatively, just shrink the fs in /var/opt to make room for the > metadata. Are these mailservers in a failover cluster? If you can take > them down for maintenance one at a time, you should be able to modify > the filesystems. > > >>> Should I use >>> http://www.drbd.org/users-guide/s-lvm-lv-as-drbd-backing-dev.html >>> Mean Should I create a lvm device then I map drbd device on it. >>> > You are trying this already, as far as I can tell from your config. > > >>> Is there any way that I donot change the partition table, >>> Mean I donot change size of any partition. or create any partition? >>> >>> An other question: >>> What should I place in "disk /dev/VolGroup00/LogVol00;" should I use >>> 'disk /sdb2" or "disk /sda2" >>> > I don't fully understand your layout. Does your PV comprise /dev/sda2? > Is /dev/sdb2 used at all atm? > > >>> I just wnat to have a mirror of /var/opt directory >>> > What is currently mounted as /var/opt. > > The current partition of /var/opt should become your backing device, > then mount /dev/drbd0 as /var/opt. > > HTH, > Felix > -- ------------------ Mohammad Docharkhehsaz, ITExpert , Network Administrator, Imen Pardaz Azar Tabriz, Iran Phone:+98-411-5534465 Cell-phone:+98-9144063001 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20101027/8bc84166/attachment.htm>