What's in dmesg now? Was it doing log recovery? Which kernel version is this? More info please. Also for your dd speed test, please use iflag=direct to ensure you aren't reading cached data. -Eric On 6/25/21 7:05 AM, Ml Ml wrote: > After a loong time it mounted now. Here is some more info: > > xfs_info /mnt/backup-cluster5 > meta-data=/dev/rbd6 isize=512 agcount=65536, agsize=32768 blks > = sectsz=512 attr=2, projid32bit=1 > = crc=1 finobt=1, sparse=1, rmapbt=0 > = reflink=0 > data = bsize=4096 blocks=2147483648, imaxpct=25 > = sunit=16 swidth=16 blks > naming =version 2 bsize=4096 ascii-ci=0, ftype=1 > log =internal log bsize=4096 blocks=2560, version=2 > = sectsz=512 sunit=0 blks, lazy-count=1 > realtime =none extsz=4096 blocks=0, rtextents=0 > > On Fri, Jun 25, 2021 at 12:49 PM Ml Ml <mliebherr99@xxxxxxxxxxxxxx> wrote: >> >> Hello List, >> >> i have a rbd block device with xfs on it. After resizing it (from 6TB >> to 8TB i think) the mount need hours to complete: >> >> I started the mount 15mins ago.: >> mount -nv /dev/rbd6 /mnt/backup-cluster5 >> >> ps: >> root 1143 0.2 0.0 8904 3088 pts/0 D+ 12:17 0:03 | >> \_ mount -nv /dev/rbd6 /mnt/backup-cluster5 >> >> >> There is no timeout or ANY msg in dmesg until now. >> >> strace -p 1143 : seems to do nothing. >> iotop --pid=1143: uses about 50KB/sec >> >> dd bs=1M count=2048 if=/dev/rbd6 of=/dev/null => gives me 50MB/sec >> >> >> Any idea what´s the problem here? >> >> Cheers, >> Michael >