diff --git a/common/rc b/common/rc
index 6592c835..ed70c3c4 100644
--- a/common/rc
+++ b/common/rc
@@ -2780,7 +2780,7 @@ _require_xfs_io_command()
 		testio=`$XFS_IO_PROG -F -f -c "$command $param 0 1m" $testfile 2>&1`
 		param_checked="$param"
 		;;
-	"fpunch" | "fcollapse" | "zero" | "fzero" | "finsert" | "funshare")
+	"fpunch" | "fcollapse" | "zero" | "fzero" | "fwzero" | "finsert" | "funshare")
 		local blocksize=$(_get_file_block_size $TEST_DIR)
 		testio=`$XFS_IO_PROG -F -f -c "pwrite 0 $((5 * $blocksize))" \
 			-c "fsync" -c "$command $blocksize $((2 * $blocksize))" \
diff --git a/tests/generic/764 b/tests/generic/764
new file mode 100755
index 00000000..0750666b
--- /dev/null
+++ b/tests/generic/764
@@ -0,0 +1,34 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2025 Huawei.  All Rights Reserved.
+#
+# FS QA Test No. 764
+#
+# Makes calls to fallocate write zeroes range and checks tossed ranges
+#
+# Primarily tests page boundries and boundries that are off-by-one to
+# ensure we're only tossing what's expected
+#
+# (generic/008 is a similar test but for fzero.)
+#
+. ./common/preamble
+_begin_fstest auto quick prealloc zero
+
+# Import common functions.
+. ./common/filter
+. ./common/punch
+
+# Modify as appropriate.
+_require_xfs_io_command "fwzero"
+_require_test
+
+testfile=$TEST_DIR/764.$$
+
+_test_block_boundaries 1024 fwzero _filter_xfs_io_unique $testfile
+_test_block_boundaries 2048 fwzero _filter_xfs_io_unique $testfile
+_test_block_boundaries 4096 fwzero _filter_xfs_io_unique $testfile
+_test_block_boundaries 65536 fwzero _filter_xfs_io_unique $testfile
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/764.out b/tests/generic/764.out
new file mode 100644
index 00000000..18bda195
--- /dev/null
+++ b/tests/generic/764.out
@@ -0,0 +1,433 @@
+QA output created by 764
+zero 0, 1
+wrote 1024/1024 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 1024/1024 bytes at offset 1024
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  00 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41  .AAAAAAAAAAAAAAA
+00000010:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41  AAAAAAAAAAAAAAAA
+*
+00000400:  42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42  BBBBBBBBBBBBBBBB
+*
+read 2048/2048 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 0, 1023
+wrote 1024/1024 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 1024/1024 bytes at offset 1024
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+000003f0:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 41  ...............A
+00000400:  42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42  BBBBBBBBBBBBBBBB
+*
+read 2048/2048 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 0, 1024
+wrote 1024/1024 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 1024/1024 bytes at offset 1024
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+00000400:  42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42  BBBBBBBBBBBBBBBB
+*
+read 2048/2048 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 0, 1025
+wrote 1024/1024 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 1024/1024 bytes at offset 1024
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+00000400:  00 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42  .BBBBBBBBBBBBBBB
+00000410:  42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42  BBBBBBBBBBBBBBBB
+*
+read 2048/2048 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 1023, 1024
+wrote 1024/1024 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 1024/1024 bytes at offset 1024
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41  AAAAAAAAAAAAAAAA
+*
+000003f0:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 00  AAAAAAAAAAAAAAA.
+00000400:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+000007f0:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 42  ...............B
+read 2048/2048 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 1023, 1025
+wrote 1024/1024 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 1024/1024 bytes at offset 1024
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41  AAAAAAAAAAAAAAAA
+*
+000003f0:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 00  AAAAAAAAAAAAAAA.
+00000400:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+read 2048/2048 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 1023, 1026
+wrote 1024/1024 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 1024/1024 bytes at offset 1024
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41  AAAAAAAAAAAAAAAA
+*
+000003f0:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 00  AAAAAAAAAAAAAAA.
+00000400:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+read 2048/2048 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 1024, 1024
+wrote 1024/1024 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 1024/1024 bytes at offset 1024
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41  AAAAAAAAAAAAAAAA
+*
+00000400:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+read 2048/2048 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 512 , 1024
+wrote 1024/1024 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 1024/1024 bytes at offset 1024
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41  AAAAAAAAAAAAAAAA
+*
+00000200:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+00000600:  42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42  BBBBBBBBBBBBBBBB
+*
+read 2048/2048 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 0, 1
+wrote 2048/2048 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 2048/2048 bytes at offset 2048
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  00 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41  .AAAAAAAAAAAAAAA
+00000010:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41  AAAAAAAAAAAAAAAA
+*
+00000800:  42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42  BBBBBBBBBBBBBBBB
+*
+read 4096/4096 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 0, 2047
+wrote 2048/2048 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 2048/2048 bytes at offset 2048
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+000007f0:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 41  ...............A
+00000800:  42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42  BBBBBBBBBBBBBBBB
+*
+read 4096/4096 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 0, 2048
+wrote 2048/2048 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 2048/2048 bytes at offset 2048
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+00000800:  42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42  BBBBBBBBBBBBBBBB
+*
+read 4096/4096 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 0, 2049
+wrote 2048/2048 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 2048/2048 bytes at offset 2048
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+00000800:  00 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42  .BBBBBBBBBBBBBBB
+00000810:  42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42  BBBBBBBBBBBBBBBB
+*
+read 4096/4096 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 2047, 2048
+wrote 2048/2048 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 2048/2048 bytes at offset 2048
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41  AAAAAAAAAAAAAAAA
+*
+000007f0:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 00  AAAAAAAAAAAAAAA.
+00000800:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+00000ff0:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 42  ...............B
+read 4096/4096 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 2047, 2049
+wrote 2048/2048 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 2048/2048 bytes at offset 2048
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41  AAAAAAAAAAAAAAAA
+*
+000007f0:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 00  AAAAAAAAAAAAAAA.
+00000800:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+read 4096/4096 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 2047, 2050
+wrote 2048/2048 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 2048/2048 bytes at offset 2048
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41  AAAAAAAAAAAAAAAA
+*
+000007f0:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 00  AAAAAAAAAAAAAAA.
+00000800:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+read 4096/4096 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 2048, 2048
+wrote 2048/2048 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 2048/2048 bytes at offset 2048
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41  AAAAAAAAAAAAAAAA
+*
+00000800:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+read 4096/4096 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 1024 , 2048
+wrote 2048/2048 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 2048/2048 bytes at offset 2048
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41  AAAAAAAAAAAAAAAA
+*
+00000400:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+00000c00:  42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42  BBBBBBBBBBBBBBBB
+*
+read 4096/4096 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 0, 1
+wrote 4096/4096 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 4096/4096 bytes at offset 4096
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  00 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41  .AAAAAAAAAAAAAAA
+00000010:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41  AAAAAAAAAAAAAAAA
+*
+00001000:  42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42  BBBBBBBBBBBBBBBB
+*
+read 8192/8192 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 0, 4095
+wrote 4096/4096 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 4096/4096 bytes at offset 4096
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+00000ff0:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 41  ...............A
+00001000:  42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42  BBBBBBBBBBBBBBBB
+*
+read 8192/8192 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 0, 4096
+wrote 4096/4096 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 4096/4096 bytes at offset 4096
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+00001000:  42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42  BBBBBBBBBBBBBBBB
+*
+read 8192/8192 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 0, 4097
+wrote 4096/4096 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 4096/4096 bytes at offset 4096
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+00001000:  00 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42  .BBBBBBBBBBBBBBB
+00001010:  42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42  BBBBBBBBBBBBBBBB
+*
+read 8192/8192 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 4095, 4096
+wrote 4096/4096 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 4096/4096 bytes at offset 4096
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41  AAAAAAAAAAAAAAAA
+*
+00000ff0:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 00  AAAAAAAAAAAAAAA.
+00001000:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+00001ff0:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 42  ...............B
+read 8192/8192 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 4095, 4097
+wrote 4096/4096 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 4096/4096 bytes at offset 4096
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41  AAAAAAAAAAAAAAAA
+*
+00000ff0:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 00  AAAAAAAAAAAAAAA.
+00001000:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+read 8192/8192 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 4095, 4098
+wrote 4096/4096 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 4096/4096 bytes at offset 4096
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41  AAAAAAAAAAAAAAAA
+*
+00000ff0:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 00  AAAAAAAAAAAAAAA.
+00001000:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+read 8192/8192 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 4096, 4096
+wrote 4096/4096 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 4096/4096 bytes at offset 4096
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41  AAAAAAAAAAAAAAAA
+*
+00001000:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+read 8192/8192 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 2048 , 4096
+wrote 4096/4096 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 4096/4096 bytes at offset 4096
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41  AAAAAAAAAAAAAAAA
+*
+00000800:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+00001800:  42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42  BBBBBBBBBBBBBBBB
+*
+read 8192/8192 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 0, 1
+wrote 65536/65536 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 65536/65536 bytes at offset 65536
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  00 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41  .AAAAAAAAAAAAAAA
+00000010:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41  AAAAAAAAAAAAAAAA
+*
+00010000:  42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42  BBBBBBBBBBBBBBBB
+*
+read 131072/131072 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 0, 65535
+wrote 65536/65536 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 65536/65536 bytes at offset 65536
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+0000fff0:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 41  ...............A
+00010000:  42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42  BBBBBBBBBBBBBBBB
+*
+read 131072/131072 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 0, 65536
+wrote 65536/65536 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 65536/65536 bytes at offset 65536
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+00010000:  42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42  BBBBBBBBBBBBBBBB
+*
+read 131072/131072 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 0, 65537
+wrote 65536/65536 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 65536/65536 bytes at offset 65536
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+00010000:  00 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42  .BBBBBBBBBBBBBBB
+00010010:  42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42  BBBBBBBBBBBBBBBB
+*
+read 131072/131072 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 65535, 65536
+wrote 65536/65536 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 65536/65536 bytes at offset 65536
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41  AAAAAAAAAAAAAAAA
+*
+0000fff0:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 00  AAAAAAAAAAAAAAA.
+00010000:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+0001fff0:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 42  ...............B
+read 131072/131072 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 65535, 65537
+wrote 65536/65536 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 65536/65536 bytes at offset 65536
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41  AAAAAAAAAAAAAAAA
+*
+0000fff0:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 00  AAAAAAAAAAAAAAA.
+00010000:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+read 131072/131072 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 65535, 65538
+wrote 65536/65536 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 65536/65536 bytes at offset 65536
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41  AAAAAAAAAAAAAAAA
+*
+0000fff0:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 00  AAAAAAAAAAAAAAA.
+00010000:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+read 131072/131072 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 65536, 65536
+wrote 65536/65536 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 65536/65536 bytes at offset 65536
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41  AAAAAAAAAAAAAAAA
+*
+00010000:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+read 131072/131072 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+zero 32768 , 65536
+wrote 65536/65536 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 65536/65536 bytes at offset 65536
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+00000000:  41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41  AAAAAAAAAAAAAAAA
+*
+00008000:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
+*
+00018000:  42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42  BBBBBBBBBBBBBBBB
+*
+read 131072/131072 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
