my version is 50407
a data miscompare occur when i test my storage，i find my storage received 3 io in same lba，two writes and one read，the read want to meet the fisrt write，but the read happen after the second write，so data miscompare
[root@HN_0_1 VDBENCH]# cat oldcomfig
messagescan=no
sd=default,openflags=o_direct,threads=16
sd=sd1,lun=/dev/sdl
sd=sd2,lun=/dev/sdm
sd=sd3,lun=/dev/sdn
sd=sd4,lun=/dev/sdo
sd=sd5,lun=/dev/sdp
sd=sd6,lun=/dev/sdq
sd=sd7,lun=/dev/sdr
sd=sd8,lun=/dev/sds
sd=sd9,lun=/dev/sdt
sd=sd10,lun=/dev/sdu
wd=wd1,sd=sd*,seekpct=100,rdpct=70,xfersize=(8k,40,32k,10,16k,40,256k,10)
rd=run1,wd=wd*,iorate=max,elapsed=100000,interval=1
20:04:04.143 localhost-7: 20:04:04.140
20:04:04.189 localhost-7: 20:04:04.140 Time of first corruption: Thu Mar 28 2019 20:04:04.140 EDT
20:04:04.189 localhost-7: 20:04:04.140
20:04:04.190 localhost-7: 20:04:04.140 At least one Data Validation error has been detected.
20:04:04.190 localhost-7: 20:04:04.140
20:04:04.190 localhost-7: 20:04:04.140 Terminology:
20:04:04.190 localhost-7: 20:04:04.140 - Data block: a block of xfersize= bytes.
20:04:04.190 localhost-7: 20:04:04.140 - Key block: the smallest xfersize specified by the user which is the unit of
20:04:04.190 localhost-7: 20:04:04.141 data that Data Validation keeps track of.
20:04:04.190 localhost-7: 20:04:04.141 - Sector: 512 bytes of disk storage, regardless of actual storage sector size.
20:04:04.190 localhost-7: 20:04:04.141 - Lba: Logical Byte Address, not to be confused with Logical Block Address.
20:04:04.190 localhost-7: 20:04:04.141
20:04:04.190 localhost-7: 20:04:04.141
20:04:04.190 localhost-7: 20:04:04.141 The output starts with a summary of a data block, followed by a summary of each
20:04:04.190 localhost-7: 20:04:04.141 key block. If all sectors in a key block show a similar type of data corruption
20:04:04.190 localhost-7: 20:04:04.141 only the FIRST sector of the key block will be reported.
20:04:04.190 localhost-7: 20:04:04.141 For all other cases, ALL sectors will be reported.
20:04:04.190 localhost-7: 20:04:04.141
20:04:04.190 localhost-7: 20:04:04.141 Contents of the first 32 bytes of each sector:
20:04:04.190 localhost-7: 20:04:04.141
20:04:04.190 localhost-7: 20:04:04.141 Byte 0x00 - 0x07: Byte offset of this disk block
20:04:04.190 localhost-7: 20:04:04.141 Byte 0x08 - 0x0f: Timestamp: number of milliseconds since 1/1/1970
20:04:04.191 localhost-7: 20:04:04.141 Byte 0x10 : Data Validation key from 1 - 126
20:04:04.191 localhost-7: 20:04:04.141 Byte 0x11 : Checksum of timestamp
20:04:04.191 localhost-7: 20:04:04.141 Byte 0x12 - 0x13: Reserved
20:04:04.191 localhost-7: 20:04:04.141 Byte 0x14 - 0x1b: SD or FSD name in ASCII hexadecimal
20:04:04.191 localhost-7: 20:04:04.141 Byte 0x1c - 0x1f: Owner ID when written
20:04:04.191 localhost-7: 20:04:04.141 Byte 0x20 - 0x1ff: 480 bytes of compression data pattern
20:04:04.191 localhost-7: 20:04:04.142
20:04:04.191 localhost-7: 20:04:04.142 On the left: the data that was expected ('.' marks unknown value).
20:04:04.191 localhost-7: 20:04:04.142 On the right: the data that was found.
20:04:04.191 localhost-7: 20:04:04.142
20:04:04.192 localhost-7: 20:04:04.143
20:04:04.192 localhost-7: 20:04:04.144
20:04:04.192 localhost-7: 20:04:04.144
20:04:04.192 localhost-7: 20:04:04.144 Corrupted data block for sd=sd8,lun=/dev/sds; lba: 24,576,524,288 (0x5b8e00000) xfersize=262144
20:04:04.192 localhost-7: 20:04:04.144
20:04:04.192 localhost-7: 20:04:04.144 Data block has 32 key block(s) of 8192 bytes each.
20:04:04.192 localhost-7: 20:04:04.144 4 of 32 key blocks are corrupted.
20:04:04.192 localhost-7: 20:04:04.144 Key block lba: 0x5b8e38000
20:04:04.192 localhost-7: 20:04:04.144 Key block of 8,192 bytes has 16 512-byte sectors.
20:04:04.192 localhost-7: 20:04:04.145 Timeline:
20:04:04.192 localhost-7: 20:04:04.147 Thu Mar 28 2019 20:04:02.202 EDT Sector last written. (As found in the first corrupted sector, timestamp is taken just BEFORE the actual write).
20:04:04.192 localhost-7: 20:04:04.147 Thu Mar 28 2019 20:04:04.114 EDT Key block first found to be corrupted during a workload requested read.
20:04:04.192 localhost-7: 20:04:04.147
20:04:04.192 localhost-7: 20:04:04.147 All 16 sectors in this key block are corrupted.
20:04:04.192 localhost-7: 20:04:04.147 All corruptions are of the same type:
20:04:04.192 localhost-7: 20:04:04.147 ===> Data Validation Key miscompare. Expecting key=0x07 received key=0x28 (7/40)
20:04:04.192 localhost-7: 20:04:04.147 ===> Bad owner id. Expecting 0x2a25 (10789) but found 0x29a24
20:04:04.192 localhost-7: 20:04:04.147 Only the FIRST sector will be reported:
20:04:04.192 localhost-7: 20:04:04.147
20:04:04.192 localhost-7: 20:04:04.147 Data Validation error for sd=sd8,lun=/dev/sds
20:04:04.192 localhost-7: 20:04:04.147 Block lba: 0x5b8e38000; sector lba: 0x5b8e38000; Key block size: 8192; relative sector in data block: 0x00 ( 0)
20:04:04.192 localhost-7: 20:04:04.165 0x000 00000005 b8e38000 ........ ........ 00000005 b8e38000 00000169 c6c2b21a
20:04:04.192 localhost-7: 20:04:04.165 0x010 07..0000 20386473 20202020 00000000 28be0000 20386473 20202020 00029a24
20:04:04.192 localhost-7: 20:04:04.165 There are no mismatches in bytes 32-511
20:04:04.193 localhost-7: 20:04:04.166 Key block lba: 0x5b8e3a000
20:04:04.193 localhost-7: 20:04:04.166 Key block of 8,192 bytes has 16 512-byte sectors.
20:04:04.193 localhost-7: 20:04:04.166 Timeline:
20:04:04.193 localhost-7: 20:04:04.167 Thu Mar 28 2019 20:04:02.202 EDT Sector last written. (As found in the first corrupted sector, timestamp is taken just BEFORE the actual write).
20:04:04.193 localhost-7: 20:04:04.167 Thu Mar 28 2019 20:04:04.127 EDT Key block first found to be corrupted during a workload requested read.
20:04:04.193 localhost-7: 20:04:04.167
20:04:04.193 localhost-7: 20:04:04.167 All 16 sectors in this key block are corrupted.
20:04:04.193 localhost-7: 20:04:04.167 All corruptions are of the same type:
20:04:04.193 localhost-7: 20:04:04.167 ===> Data Validation Key miscompare. Expecting key=0x67 received key=0x13 (103/19)
20:04:04.193 localhost-7: 20:04:04.167 ===> Bad owner id. Expecting 0x2a25 (10789) but found 0x29a24
20:04:04.193 localhost-7: 20:04:04.167 Only the FIRST sector will be reported:
20:04:04.193 localhost-7: 20:04:04.167
20:04:04.193 localhost-7: 20:04:04.167 Data Validation error for sd=sd8,lun=/dev/sds
20:04:04.193 localhost-7: 20:04:04.167 Block lba: 0x5b8e3a000; sector lba: 0x5b8e3a000; Key block size: 8192; relative sector in data block: 0x00 ( 0)
20:04:04.193 localhost-7: 20:04:04.173 0x000 00000005 b8e3a000 ........ ........ 00000005 b8e3a000 00000169 c6c2b21a
20:04:04.193 localhost-7: 20:04:04.173 0x010 67..0000 20386473 20202020 00000000 13be0000 20386473 20202020 00029a24
20:04:04.193 localhost-7: 20:04:04.173 There are no mismatches in bytes 32-511
20:04:04.194 localhost-7: 20:04:04.174 Key block lba: 0x5b8e3c000
20:04:04.194 localhost-7: 20:04:04.174 Key block of 8,192 bytes has 16 512-byte sectors.
20:04:04.194 localhost-7: 20:04:04.174 Timeline:
20:04:04.194 localhost-7: 20:04:04.174 Thu Mar 28 2019 20:04:02.202 EDT Sector last written. (As found in the first corrupted sector, timestamp is taken just BEFORE the actual write).
20:04:04.194 localhost-7: 20:04:04.174 Thu Mar 28 2019 20:04:04.133 EDT Key block first found to be corrupted during a workload requested read.
20:04:04.194 localhost-7: 20:04:04.174
20:04:04.194 localhost-7: 20:04:04.174 All 16 sectors in this key block are corrupted.
20:04:04.194 localhost-7: 20:04:04.174 All corruptions are of the same type:
20:04:04.194 localhost-7: 20:04:04.174 ===> Data Validation Key miscompare. Expecting key=0x36 received key=0x67 (54/103)
20:04:04.194 localhost-7: 20:04:04.174 ===> Bad owner id. Expecting 0x2a25 (10789) but found 0x29a24
20:04:04.194 localhost-7: 20:04:04.174 Only the FIRST sector will be reported:
20:04:04.194 localhost-7: 20:04:04.174
20:04:04.194 localhost-7: 20:04:04.174 Data Validation error for sd=sd8,lun=/dev/sds
20:04:04.194 localhost-7: 20:04:04.174 Block lba: 0x5b8e3c000; sector lba: 0x5b8e3c000; Key block size: 8192; relative sector in data block: 0x00 ( 0)
20:04:04.194 localhost-7: 20:04:04.180 0x000 00000005 b8e3c000 ........ ........ 00000005 b8e3c000 00000169 c6c2b21a
20:04:04.194 localhost-7: 20:04:04.180 0x010 36..0000 20386473 20202020 00000000 67be0000 20386473 20202020 00029a24
20:04:04.194 localhost-7: 20:04:04.180 There are no mismatches in bytes 32-511