echo '1' 2>&1 > /sys/fs/xfs/sdb/error/fail_at_unmount
echo '0' 2>&1 > /sys/fs/xfs/sdb/error/metadata/EIO/max_retries
echo '0' 2>&1 > /sys/fs/xfs/sdb/error/metadata/EIO/retry_timeout_seconds
meta-data=/dev/sdb               isize=512    agcount=4, agsize=1966080 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=1, sparse=1, rmapbt=1
         =                       reflink=1    bigtime=1 inobtcount=1 nrext64=1
         =                       exchange=0   metadir=0
data     =                       bsize=4096   blocks=7864320, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0, ftype=1, parent=0
log      =internal log           bsize=4096   blocks=16384, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
         =                       rgcount=0    rgsize=0 extents
         =                       zoned=0      start=0 reserved=0
echo '1' 2>&1 > /sys/fs/xfs/sdb/error/fail_at_unmount
echo '0' 2>&1 > /sys/fs/xfs/sdb/error/metadata/EIO/max_retries
echo '0' 2>&1 > /sys/fs/xfs/sdb/error/metadata/EIO/retry_timeout_seconds
append_write
wrote 4096/4096 bytes at offset 0
4 KiB, 1 ops; 0.0000 sec (169.837 MiB/sec and 43478.2609 ops/sec)
wrote 4096/4096 bytes at offset 53248
4 KiB, 1 ops; 0.0000 sec (79.719 MiB/sec and 20408.1633 ops/sec)
echo '1' 2>&1 > /sys/fs/xfs/sdb/error/fail_at_unmount
echo '0' 2>&1 > /sys/fs/xfs/sdb/error/metadata/EIO/max_retries
echo '0' 2>&1 > /sys/fs/xfs/sdb/error/metadata/EIO/retry_timeout_seconds
wrote 4096/4096 bytes at offset 4096
4 KiB, 1 ops; 0.0000 sec (52.083 MiB/sec and 13333.3333 ops/sec)
echo '1' 2>&1 > /sys/fs/xfs/sdb/error/fail_at_unmount
echo '0' 2>&1 > /sys/fs/xfs/sdb/error/metadata/EIO/max_retries
echo '0' 2>&1 > /sys/fs/xfs/sdb/error/metadata/EIO/retry_timeout_seconds
truncate_up
wrote 4096/4096 bytes at offset 0
4 KiB, 1 ops; 0.0000 sec (244 MiB/sec and 62500.0000 ops/sec)
wrote 4096/4096 bytes at offset 61440
4 KiB, 1 ops; 0.0000 sec (73.703 MiB/sec and 18867.9245 ops/sec)
echo '1' 2>&1 > /sys/fs/xfs/sdb/error/fail_at_unmount
echo '0' 2>&1 > /sys/fs/xfs/sdb/error/metadata/EIO/max_retries
echo '0' 2>&1 > /sys/fs/xfs/sdb/error/metadata/EIO/retry_timeout_seconds
echo '1' 2>&1 > /sys/fs/xfs/sdb/error/fail_at_unmount
echo '0' 2>&1 > /sys/fs/xfs/sdb/error/metadata/EIO/max_retries
echo '0' 2>&1 > /sys/fs/xfs/sdb/error/metadata/EIO/retry_timeout_seconds
fallocate
wrote 4096/4096 bytes at offset 0
4 KiB, 1 ops; 0.0000 sec (217.014 MiB/sec and 55555.5556 ops/sec)
wrote 4096/4096 bytes at offset 98304
4 KiB, 1 ops; 0.0000 sec (68.531 MiB/sec and 17543.8596 ops/sec)
echo '1' 2>&1 > /sys/fs/xfs/sdb/error/fail_at_unmount
echo '0' 2>&1 > /sys/fs/xfs/sdb/error/metadata/EIO/max_retries
echo '0' 2>&1 > /sys/fs/xfs/sdb/error/metadata/EIO/retry_timeout_seconds
echo '1' 2>&1 > /sys/fs/xfs/sdb/error/fail_at_unmount
echo '0' 2>&1 > /sys/fs/xfs/sdb/error/metadata/EIO/max_retries
echo '0' 2>&1 > /sys/fs/xfs/sdb/error/metadata/EIO/retry_timeout_seconds