== sanity test 54c: block device works in lustre =============================================================================== 13:00:57 (1736359257)
make a loop file system with /mnt/lustre/f54c.sanity on /mnt/lustre/loop54c (3).
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4096 bytes (4.1 kB) copied, 0.00198131 s, 2.1 MB/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

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122880 bytes (123 kB) copied, 0.000876014 s, 140 MB/s
Filesystem          1K-blocks  Used Available Use% Mounted on
/mnt/lustre/loop54c      3950   135      3610   4% /mnt/lustre/d54c.sanity
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122880 bytes (123 kB) copied, 0.000282972 s, 434 MB/s
losetup: /mnt/lustre/loop54c: detach failed: No such device or address
losetup: /dev/loop3: detach failed: No such device or address