On 12/12/18 4:44 PM, Vikas Rana wrote: > Hi, > > We are using Luminous and copying a 100TB RBD image to DR site using RBD > Mirror. > > Everything seems to works fine. > > The question is, can we mount the DR copy as Read-Only? We can do it on > Netapp and we are trying to figure out if somehow we can mount it RO on > DR site, then we can do backups at DR site. > > When i tried it mount it via, RBD-NBD, it complains about super-block. > When I promoted the DR copy, the same image works fine. So data is there > but cant be mounted. > What filesystem is being used here? EXT4? Try mounting it with: $ mount ro,noload /dev/XXXX /tmp/myrbd Otherwise the FS will try to load the journal and that fails. Wido > We also tried taking snap but it complains that it can't take snap of a > Read-only copy. > > Any suggestion or pointer will be greatly appreciated. > > Thanks, > -Vikas > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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