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=4096  attr=2, projid32bit=1
         =                       crc=1        finobt=1, sparse=1, rmapbt=1
         =                       reflink=1    bigtime=1 inobtcount=1 nrext64=1
         =                       exchange=1   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=1
log      =internal log           bsize=4096   blocks=16384, version=2
         =                       sectsz=4096  sunit=1 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 (114.890 MiB/sec and 29411.7647 ops/sec)
wrote 4096/4096 bytes at offset 98304
4 KiB, 1 ops; 0.0000 sec (62.004 MiB/sec and 15873.0159 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 (45.956 MiB/sec and 11764.7059 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 (300.481 MiB/sec and 76923.0769 ops/sec)
wrote 4096/4096 bytes at offset 106496
4 KiB, 1 ops; 0.0000 sec (60.096 MiB/sec and 15384.6154 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 (229.779 MiB/sec and 58823.5294 ops/sec)
wrote 4096/4096 bytes at offset 110592
4 KiB, 1 ops; 0.0000 sec (63.004 MiB/sec and 16129.0323 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