# # xfs_io -f -c "pwrite 0 64k" -c fsync \ -c "bmap -vp" -c "fiemap -v" \ -c "falloc 1024k 256k" -c fsync \ -c "pwrite 1088k 64k" -c fsync \ -c "bmap -vp" -c "fiemap -v" \ /media/p6/testfile # xfs_io -f -c "pwrite 0 64k" -c fsync \ > -c "bmap -vp" -c "fiemap -v" \ > -c "falloc 1024k 256k" -c fsync \ > -c "pwrite 1088k 64k" -c fsync \ > -c "bmap -vp" -c "fiemap -v" \ > /media/p6/testfile wrote 65536/65536 bytes at offset 0 64 KiB, 16 ops; 0.0000 sec (10.271 MiB/sec and 2629.4166 ops/sec) /media/p6/testfile: EXT: FILE-OFFSET BLOCK-RANGE AG AG-OFFSET TOTAL FLAGS 0: [0..127]: 96..223 0 (96..223) 128 00000 /media/p6/testfile: EXT: FILE-OFFSET BLOCK-RANGE TOTAL FLAGS 0: [0..127]: 96..223 128 0x1 wrote 65536/65536 bytes at offset 1114112 64 KiB, 16 ops; 0.0000 sec (11.857 MiB/sec and 3035.4771 ops/sec) /media/p6/testfile: EXT: FILE-OFFSET BLOCK-RANGE AG AG-OFFSET TOTAL FLAGS 0: [0..127]: 96..223 0 (96..223) 128 00000 1: [128..2047]: hole 1920 2: [2048..2175]: 2144..2271 0 (2144..2271) 128 10000 3: [2176..2303]: 2272..2399 0 (2272..2399) 128 00000 4: [2304..2559]: 2400..2655 0 (2400..2655) 256 10000 /media/p6/testfile: EXT: FILE-OFFSET BLOCK-RANGE TOTAL FLAGS 0: [0..127]: 96..223 128 0x0 1: [128..2047]: hole 1920 2: [2048..2175]: 2144..2271 128 0x800 3: [2176..2303]: 2272..2399 128 0x0 4: [2304..2559]: 2400..2655 256 0x801 root[251] host ~ # mkfs.xfs -f /dev/mmcblk0p6 meta-data=/dev/mmcblk0p6 isize=256 agcount=4, agsize=551008 blks = sectsz=512 attr=2, projid32bit=1 = crc=0 finobt=0 data = bsize=4096 blocks=2204032, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=0 log =internal log bsize=4096 blocks=2560, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 root[252] host ~ # mount /dev/mmcblk0p6 /media/p6 [ 1000.531021] XFS (mmcblk0p6): Mounting V4 Filesystem [ 1000.813339] XFS (mmcblk0p6): Ending clean mount root[253] host ~ # xfs_io -f -c "pwrite 0 64k" -c fsync \ > -c "bmap -vp" -c "fiemap -v" \ > -c "falloc 1024k 256k" -c fsync \ > -c "pwrite 1088k 64k" -c fsync \ > -c "fiemap -v" -c "bmap -vp" \ > /media/p6/testfile wrote 65536/65536 bytes at offset 0 64 KiB, 16 ops; 0.0000 sec (10.126 MiB/sec and 2592.3526 ops/sec) /media/p6/testfile: EXT: FILE-OFFSET BLOCK-RANGE AG AG-OFFSET TOTAL FLAGS 0: [0..127]: 96..223 0 (96..223) 128 00000 /media/p6/testfile: EXT: FILE-OFFSET BLOCK-RANGE TOTAL FLAGS 0: [0..127]: 96..223 128 0x1 wrote 65536/65536 bytes at offset 1114112 64 KiB, 16 ops; 0.0000 sec (11.519 MiB/sec and 2948.7652 ops/sec) /media/p6/testfile: EXT: FILE-OFFSET BLOCK-RANGE TOTAL FLAGS 0: [0..127]: 96..223 128 0x0 1: [128..2047]: hole 1920 2: [2048..2175]: 2144..2271 128 0x800 3: [2176..2303]: 2272..2399 128 0x0 4: [2304..2559]: 2400..2655 256 0x801 /media/p6/testfile: EXT: FILE-OFFSET BLOCK-RANGE AG AG-OFFSET TOTAL FLAGS 0: [0..127]: 96..223 0 (96..223) 128 00000 1: [128..2047]: hole 1920 2: [2048..2175]: 2144..2271 0 (2144..2271) 128 10000 3: [2176..2303]: 2272..2399 0 (2272..2399) 128 00000 4: [2304..2559]: 2400..2655 0 (2400..2655) 256 10000 root[254] host ~