Hello all, I have a question about how to calculate file size when mount a block device from rbd image . [Cluster information：] 1.The cluster with 1 mon and 6 osds. Every osd is 1T. Total spaces is 5556G. 2.rbd pool：replicated size 2 min_size 1. num = 128. Except rbd pool other pools is empty.
[Steps] 1.On Linux client I use rbd command to create a 1.5T rbd image and format it with ext4. 2.Use dd command to create a 1.2T file. #dd if=/dev/zero of=/mnt/ceph-mount/test12T bs=1M count=12288000 3.When dd finished the information shows "No space left on device". But parted -l display the disk space is 1611G. Why does the system show space not enough？ Is there something I misunderstand or wrong？ Best wishes, Mika
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