Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Na, if you use xfs you cannot use resize2fs as it can handle ext2/ext3 only.
No wonder it doesn't find a valid superblock. I don't know if there is a
possibility to shrink xfs but I haven't seen other ways then copying the
data, resizing the partition and copying again. I have no experience with lvm
but as far as I can see lvresize is for resizing the logical volume itself
which means that you would indeed lose data when you do not shrink the
filesystem before. Especially when you use -L without the '-' as you wouldn't
shrink it BY 128 but TO 128 M. If you have the possibility you should use
external metadata I guess. It seems to be the least complicated and dangerous
way in your setup.
Am Dienstag, 19. April 2005 04:03 schrieb David Huang:
> I was trying to shrink the device( a lvm2 volume ) i am going to replicate.
> I am using LVM2 with XFS, does it mean I have to use lvresize insteadof
> resize2fs? because when I use resize2fs on a volume(lv1) which is 256M, it
> shows:
>
> -bash-3.00# resize2fs /dev/VG01/lv1/ 128
> resize2fs 1.35 (28-Feb-2004)
> resize2fs: No such file or directory while trying to open
> /dev/VG01200504181802p roNASVG/lv1/
> Couldn't find valid filesystem superblock.
>
> however when i run lvreize, it shows:
> lvresize /dev/VG01/lv1 -L 128M
> WARNING: Reducing active logical volume to 128.00 MB
> THIS MAY DESTROY YOUR DATA (filesystem etc.)
> Do you really want to reduce lv1? [y/n]:
>
>
>
> If I remember right, the size of XFS filesystem can not be reduced? Does it
> mean it is better to put metadata in other device instead of internal??
>
>
>
> -----Original Message-----
> From: drbd-user-bounces at lists.linbit.com
> [mailto:drbd-user-bounces at lists.linbit.com]On Behalf Of Stephan Rattai
> Sent: Monday, April 18, 2005 7:04 PM
> To: drbd-user at linbit.com
> Subject: Re: [DRBD-user] unable to mount DRBD device?
>
>
> Yes, you can use an existing filesystem if you have
>
> a) 128 Megs free for each metadata-device or
> b) are using external metadata
>
> you can use an existing filesystem, yes. Did you shrink your existing
> filesystem by 128 M as explained here:
> http://www.drbd.org/quickstart.html
>
> Am Montag, 18. April 2005 12:55 schrieb David Huang:
> > I am able to mount the device if I mkfs /dev/drbdX, however it is not
> > what i want. I thought DRBD works on an existing filesystem??
> >
> >
> >
> > -----Original Message-----
> > From: drbd-user-bounces at lists.linbit.com
> > [mailto:drbd-user-bounces at lists.linbit.com]On Behalf Of David Huang
> > Sent: Friday, April 15, 2005 9:54 AM
> > To: drbd-user at lists.linbit.com
> > Subject: RE: [DRBD-user] unable to mount DRBD device?
> >
> >
> > drbdadm state all shows Primary/Secondary
> > drbdadm cstate all shows Connected
> >
> > I am running out of ideas, any help and suggestion is welcome
> >
> >
> > cheers
> >
> > David Huang
> >
> > -----Original Message-----
> > From: M-Ackermann [mailto:Manfred.Ackermann at t-systems.com]
> > Sent: Thursday, April 14, 2005 7:09 PM
> > To: david_huang at proware.com.tw
> > Subject: AW: [DRBD-user] unable to mount DRBD device?
> >
> >
> > One of my configs is:
> >
> > [acki at cm1 ~]$ cat /etc/redhat-release
> > Red Hat Enterprise Linux AS release 4 (Nahant)
> > [acki at cm1 ~]$ uname -r
> > 2.6.9-5.ELsmp
> > [acki at cm1 ~]$ rpm -qa|grep -i lvm
> > lvm2-2.00.31-1.0.RHEL4
> > [acki at cm1 ~]$ cat /etc/drbd.conf
> > {...snip...}
> > on some.server.de {
> > device /dev/drbd0;
> > disk /dev/vg0/lv0;
> > address other.server.de:7788;
> > meta-disk internal;
> > }
> > {...snip...}
> >
> > My kernel is a lower release ... For me all works fine. Just for info.
> > What does
> >
> > drbdadm state all; drbdadm cstate all
> >
> > says?
> >
> > Mit freundlichen Grusen
> > Manfred Ackermann
> >
> > T-Systems
> > Systems Integration
> >
> > > Systemadministrator SSC NITS
> >
> > Industry Business Unit Telco
> > T-Systems International GmbH
> > Utbremer Strase 90, D-28217 Bremen
> > Telefon: +49 421 3799-815
> > Telefax: +49 421 3799-169
> > E-Mail: prsm-eznord at t-systems.com
> > Internet: http://www.t-systems.com
> >
> >
> > -----Ursprungliche Nachricht-----
> > Von: drbd-user-bounces at lists.linbit.com
> > [mailto:drbd-user-bounces at lists.linbit.com]Im Auftrag von David Huang
> > Gesendet: Donnerstag, 14. April 2005 13:00
> > An: drbd-user at lists.linbit.com
> > Betreff: RE: [DRBD-user] unable to mount DRBD device?
> >
> >
> > thanks for the quick reply! :) Sorry I think I didn't explain the
> > stituation clearly.
> >
> > I was trying to mount the primary side's device.
> >
> > I was wondering it happened becuase of LVM2, because I am using DRBD on
> > top of LVM2 with kernel 2.6.10
> >
> >
> > cheers
> >
> > David Huang
> >
> >
> > -----Original Message-----
> > From: M-Ackermann [mailto:Manfred.Ackermann at t-systems.com]
> > Sent: Thursday, April 14, 2005 6:55 PM
> > To: david_huang at proware.com.tw
> > Subject: AW: [DRBD-user] unable to mount DRBD device?
> >
> > > After syncing an existing filesystem to secondary, I try to mount the
> > > drbd device, however it always shows "mount: /dev/drbd0: can't read
> > > superblock", is there something wrong in my config file? the filesystem
> > > is using XFS and I am using DRBD 0.7.8
> >
> > Remember: Only the primary side can be mounted! You're sure you've keept
> > that in mind?
> >
> > ---
> > Manfred Ackermann
> >
> > T-Systems
> > Systems Integration
> >
> > > Systemadministrator SSC NITS
> >
> > Industry Business Unit Telco
> > T-Systems International GmbH
> > Utbremer Strase 90, D-28217 Bremen
> > Telefon: +49 421 3799-815
> > Telefax: +49 421 3799-169
> > E-Mail: prsm-eznord at t-systems.com
> > Internet: http://www.t-systems.com
> >
> >
> > -----Ursprungliche Nachricht-----
> > Von: drbd-user-bounces at lists.linbit.com
> > [mailto:drbd-user-bounces at lists.linbit.com]Im Auftrag von David Huang
> > Gesendet: Donnerstag, 14. April 2005 12:51
> > An: drbd-user at lists.linbit.com
> > Betreff: [DRBD-user] unable to mount DRBD device?
> >
> >
> > hello everyone
> >
> > I am experiencing some problem when I am using DRBD.
> > After syncing an existing filesystem to secondary, I try to mount the
> > drbd device, however it always shows "mount: /dev/drbd0: can't read
> > superblock", is there something wrong in my config file? the filesystem
> > is using XFS and I am using DRBD 0.7.8
> >
> > the attachment is my drbd.conf
> >
> > cheers
> >
> >
> > David Huang
>
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