== sanity test 54c: block device works in lustre =============================================================================== 02:25:10 (1746080710)
make a loop file system with /mnt/lustre/f54c.sanity on /mnt/lustre/loop54c (3).
1+0 records in
1+0 records out
4096 bytes (4.1 kB) copied, 0.00781642 s, 524 kB/s
mke2fs 1.46.2.wc5 (26-Mar-2022)
Discarding device blocks: 1024/4100         done                            
Creating filesystem with 4100 1k blocks and 1032 inodes

Allocating group tables: 0/1   done                            
Writing inode tables: 0/1   done                            
Writing superblocks and filesystem accounting information: 0/1   done

striped dir -i0 -c2 -H crush /mnt/lustre/d54c.sanity
30+0 records in
30+0 records out
122880 bytes (123 kB) copied, 0.00254466 s, 48.3 MB/s
Filesystem          1K-blocks  Used Available Use% Mounted on
/mnt/lustre/loop54c      3950   135      3610   4% /mnt/lustre/d54c.sanity
30+0 records in
30+0 records out
122880 bytes (123 kB) copied, 0.000329993 s, 372 MB/s
losetup: /mnt/lustre/loop54c: detach failed: No such device or address
losetup: /dev/loop3: detach failed: No such device or address