>>> Valentin Vidic <vvi...@valentin-vidic.from.hr> schrieb am 09.09.2020 um 22:15 in Nachricht <20200909201543.gv8...@valentin-vidic.from.hr>: > On Wed, Sep 09, 2020 at 12:10:54PM +0000, Eric Robinson wrote: >> With DRBD stopped, wipefs only showed one signature... >> >> [root@001db01 ~]# wipefs /dev/vg0/lv0 >> offset type >> ‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑ >> 0x438 ext4 [filesystem] >> UUID: 2035aabe‑b6e1‑4313‑a022‑9518eb7489e6 >> >> So I just mounted the filesystem... >> >> [root@001db01 ~]# mount /dev/vg0/lv0 /mnt >> [ 7712.478905] EXT4‑fs (dm‑2): 35 orphan inodes deleted >> [ 7712.484594] EXT4‑fs (dm‑2): recovery complete >> [ 7712.506344] EXT4‑fs (dm‑2): mounted filesystem with ordered data mode. > Opts: (null) >> >> ...and all my data seems to be there? Did I miss something? I don't >> understand. Where did the DRBD partition go? > > DRBD metadata is always at the end of the device (or on a different > device if DRBD configuration sets external metadata parameter) so > the filesystem should be directly accessible once the drbd signature > is wiped. This also means it is possible to add DRBD to an existing > partition (if there is enough free space at the end or using an > external device).
But doesn't hat make resizing the volume a big mess (similar to resizing GPT disks)? > > I get a different output and behavior on Debian 10 (kernel 4.19, > DRBD 8.4.10, drbd‑utils 9.5.0): > > # wipefs /dev/vg0/drbd > DEVICE OFFSET TYPE UUID LABEL > drbd 0x3ffff03c drbd 4c26a7436a17d14 > drbd 0x438 ext4 b708b27c‑f6a6‑4f07‑8417‑8c17d8a2febb > > # mount /dev/vg0/drbd /mnt > mount: /mnt: unknown filesystem type 'drbd'. > > # wipefs ‑o 0x3ffff03c /dev/vg0/drbd > /dev/vg0/drbd: 4 bytes were erased at offset 0x3ffff03c (drbd): 83 74 02 6c > > # wipefs /dev/vg0/drbd > DEVICE OFFSET TYPE UUID LABEL > drbd 0x438 ext4 b708b27c‑f6a6‑4f07‑8417‑8c17d8a2febb > > # mount /dev/vg0/drbd /mnt > > ‑‑ > Valentin > _______________________________________________ > Manage your subscription: > https://lists.clusterlabs.org/mailman/listinfo/users > > ClusterLabs home: https://www.clusterlabs.org/ _______________________________________________ Manage your subscription: https://lists.clusterlabs.org/mailman/listinfo/users ClusterLabs home: https://www.clusterlabs.org/
