Byte-for-byte failure VSS+PHY, but no visible disk issue?
Posted: Wed Oct 23, 2013 7:12 am
Title says it all. I'm getting consistent errors, under both VSS and PHYlock, with a complete backup. I'm not doing anything different from usual.
IfW 2.83, clean install Win 8 Pro (tried to back up a pristine install before use!), newish Intel/Asus platform, memtest86+, nothing unusual I'm aware of. None the less, both VSS and PHYLock consistently report byte-by-byte validation errors.
I'm used to relying on byte-for-byte for backup integrity for crucial backups.While VSS has had verification issues in the past, usually one or the other works, this is the first time both are failing me and no idea what to do. I'd like to solve it rather than skip it since without byte-by-byte there's no firm certainty the backup is exact. The disk is a Samsung 840 Pro SSD with no SMART, reallocation, or other visible errors (as one would expect for SSD, as firmware handles any), chkdsk /scan reports no issues, the system isn't overclocked and temp is under 50 C, and driver is Intel RST 12.8.0.1016.
logl:50 shows 2 partitions verifying before the 3rd (the OS) fails. The error log reads:
[23/10/2013 06:51:23] Byte-for-Byte failure at LBA 76928 offset 0 (0)
[23/10/2013 06:51:23] DATA AS BACKED UP: (00000000060E0000)
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[23/10/2013 06:51:23] DATA NOW ON DISK: (0000000002BE0000)
68 62 69 6E 00 30 00 00 00 10 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
D0 FF FF FF 57 00 69 00 6E 00 64 00 6F 00 77 00
73 00 20 00 42 00 6F 00 6F 00 74 00 20 00 4D 00
61 00 6E 00 61 00 67 00 65 00 72 00 00 00 00 00
A8 FF FF FF 6E 6B 20 00 4B 5F 65 0B 2A CF CE 01
03 00 00 00 38 2E 00 00 00 00 00 00 00 00 00 00
FF FF FF FF FF FF FF FF 01 00 00 00 D8 29 00 00
68 01 00 00 FF FF FF FF 00 00 00 00 00 00 00 00
0E 00 00 00 0C 00 00 00 02 00 00 00 08 00 00 00
31 32 30 30 30 30 30 35 E0 FF FF FF 76 6B 07 00
4E 00 00 00 70 32 00 00 01 00 00 00 01 00 30 30
45 6C 65 6D 65 6E 74 30 F8 FF FF FF A8 30 00 00
E0 FF FF FF 76 6B 07 00 0C 00 00 00 C0 2F 00 00
01 00 00 00 01 00 00 00 45 6C 65 6D 65 6E 74 00
A8 FF FF FF 6E 6B 20 00 4B 5F 65 0B 2A CF CE 01
02 00 00 00 38 2E 00 00 00 00 00 00 00 00 00 00
FF FF FF FF FF FF FF FF 01 00 00 00 D0 2F 00 00
68 01 00 00 FF FF FF FF 00 00 00 00 00 00 00 00
0E 00 00 00 50 00 00 00 03 00 00 00 08 00 00 00
31 34 30 30 30 30 30 36 E0 FF FF FF 76 6B 07 00
50 00 00 00 68 31 00 00 07 00 00 00 01 00 00 00
45 6C 65 6D 65 6E 74 00 A8 FF FF FF 7B 00 37 00
65 00 61 00 32 00 65 00 31 00 61 00 63 00 2D 00
32 00 65 00 36 00 31 00 2D 00 34 00 37 00 32 00
38 00 2D 00 61 00 61 00 61 00 33 00 2D 00 38 00
39 00 36 00 64 00 39 00 64 00 30 00 61 00 39 00
66 00 30 00 65 00 7D 00 00 00 00 00 00 00 00 00
E8 FF FF FF 6C 66 02 00 58 0E 00 00 44 65 73 63
E8 0E 00 00 45 6C 65 6D A8 FF FF FF 6E 6B 20 00
4B 5F 65 0B 2A CF CE 01 03 00 00 00 38 2E 00 00
00 00 00 00 00 00 00 00 FF FF FF FF FF FF FF FF
[23/10/2013 06:51:24] Operation Completed with Error Code 200
[23/10/2013 06:51:24] Byte-for-Byte comparison failed
[23/10/2013 07:11:02] Stop
The log shows a hint of a pattern from previous attempts:
[19/10/2013 17:31:28] Byte-for-Byte failure at LBA 36702538 offset 0 (21504) [PHYLock]
[19/10/2013 18:56:24] Operation Completed with Error Code 0 [PHYLock]
[21/10/2013 00:05:07] Byte-for-Byte failure at LBA 41344 offset 0 (0) [PHYLock]
[21/10/2013 02:54:46] Byte-for-Byte failure at LBA 32258242 offset 0 (33792) [PHYLock]
[21/10/2013 03:03:19] Byte-for-Byte failure at LBA 76928 offset 0 (0) [VSS]
[21/10/2013 15:25:55] Byte-for-Byte failure at LBA 10654938 offset 0 (46080) [PHYLock]
[23/10/2013 06:51:23] Byte-for-Byte failure at LBA 76928 offset 0 (0) [VSS backing up to network share]
[23/10/2013 07:57:19] Byte-for-Byte failure at LBA 48986144 offset 0 (16384) [PHYLock backing up to local disk - immediately afterwards with no reboot]
[23/10/2013 08:04:49] Byte-for-Byte failure at LBA 15734271 offset 0 (65024) [identical rerun without reboot]
[23/10/2013 08:11:18] Byte-for-Byte failure at LBA 76928 offset 0 (0) [identical rerun switching back to VSS + local disk]
Does the consistency of "76928" suggest it could be something quite specific and not a random issue?
I haven't tried backing up a comparable second disk to see if that has the same issue, or the same disk accessed as a data disk from a second boot, or IfD/IfL based backup. I also haven't swapped cables over, although dodgy cables would usually lead to BSOD which I'm not getting. So there are options.
Ideally I do want the standard IfW backup to work and would like to solve why it isn't.
I suppose the first thing is to identify what happens if I substitute a different booted OS, IfW install, IfW/IfD/IfL, or backup disk/target disk. But it's a bit hit and miss to just try random fixes. Any suggestions what to look at, or what diagnostic info to get, first?
IfW 2.83, clean install Win 8 Pro (tried to back up a pristine install before use!), newish Intel/Asus platform, memtest86+, nothing unusual I'm aware of. None the less, both VSS and PHYLock consistently report byte-by-byte validation errors.
I'm used to relying on byte-for-byte for backup integrity for crucial backups.While VSS has had verification issues in the past, usually one or the other works, this is the first time both are failing me and no idea what to do. I'd like to solve it rather than skip it since without byte-by-byte there's no firm certainty the backup is exact. The disk is a Samsung 840 Pro SSD with no SMART, reallocation, or other visible errors (as one would expect for SSD, as firmware handles any), chkdsk /scan reports no issues, the system isn't overclocked and temp is under 50 C, and driver is Intel RST 12.8.0.1016.
logl:50 shows 2 partitions verifying before the 3rd (the OS) fails. The error log reads:
[23/10/2013 06:51:23] Byte-for-Byte failure at LBA 76928 offset 0 (0)
[23/10/2013 06:51:23] DATA AS BACKED UP: (00000000060E0000)
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[23/10/2013 06:51:23] DATA NOW ON DISK: (0000000002BE0000)
68 62 69 6E 00 30 00 00 00 10 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
D0 FF FF FF 57 00 69 00 6E 00 64 00 6F 00 77 00
73 00 20 00 42 00 6F 00 6F 00 74 00 20 00 4D 00
61 00 6E 00 61 00 67 00 65 00 72 00 00 00 00 00
A8 FF FF FF 6E 6B 20 00 4B 5F 65 0B 2A CF CE 01
03 00 00 00 38 2E 00 00 00 00 00 00 00 00 00 00
FF FF FF FF FF FF FF FF 01 00 00 00 D8 29 00 00
68 01 00 00 FF FF FF FF 00 00 00 00 00 00 00 00
0E 00 00 00 0C 00 00 00 02 00 00 00 08 00 00 00
31 32 30 30 30 30 30 35 E0 FF FF FF 76 6B 07 00
4E 00 00 00 70 32 00 00 01 00 00 00 01 00 30 30
45 6C 65 6D 65 6E 74 30 F8 FF FF FF A8 30 00 00
E0 FF FF FF 76 6B 07 00 0C 00 00 00 C0 2F 00 00
01 00 00 00 01 00 00 00 45 6C 65 6D 65 6E 74 00
A8 FF FF FF 6E 6B 20 00 4B 5F 65 0B 2A CF CE 01
02 00 00 00 38 2E 00 00 00 00 00 00 00 00 00 00
FF FF FF FF FF FF FF FF 01 00 00 00 D0 2F 00 00
68 01 00 00 FF FF FF FF 00 00 00 00 00 00 00 00
0E 00 00 00 50 00 00 00 03 00 00 00 08 00 00 00
31 34 30 30 30 30 30 36 E0 FF FF FF 76 6B 07 00
50 00 00 00 68 31 00 00 07 00 00 00 01 00 00 00
45 6C 65 6D 65 6E 74 00 A8 FF FF FF 7B 00 37 00
65 00 61 00 32 00 65 00 31 00 61 00 63 00 2D 00
32 00 65 00 36 00 31 00 2D 00 34 00 37 00 32 00
38 00 2D 00 61 00 61 00 61 00 33 00 2D 00 38 00
39 00 36 00 64 00 39 00 64 00 30 00 61 00 39 00
66 00 30 00 65 00 7D 00 00 00 00 00 00 00 00 00
E8 FF FF FF 6C 66 02 00 58 0E 00 00 44 65 73 63
E8 0E 00 00 45 6C 65 6D A8 FF FF FF 6E 6B 20 00
4B 5F 65 0B 2A CF CE 01 03 00 00 00 38 2E 00 00
00 00 00 00 00 00 00 00 FF FF FF FF FF FF FF FF
[23/10/2013 06:51:24] Operation Completed with Error Code 200
[23/10/2013 06:51:24] Byte-for-Byte comparison failed
[23/10/2013 07:11:02] Stop
The log shows a hint of a pattern from previous attempts:
[19/10/2013 17:31:28] Byte-for-Byte failure at LBA 36702538 offset 0 (21504) [PHYLock]
[19/10/2013 18:56:24] Operation Completed with Error Code 0 [PHYLock]
[21/10/2013 00:05:07] Byte-for-Byte failure at LBA 41344 offset 0 (0) [PHYLock]
[21/10/2013 02:54:46] Byte-for-Byte failure at LBA 32258242 offset 0 (33792) [PHYLock]
[21/10/2013 03:03:19] Byte-for-Byte failure at LBA 76928 offset 0 (0) [VSS]
[21/10/2013 15:25:55] Byte-for-Byte failure at LBA 10654938 offset 0 (46080) [PHYLock]
[23/10/2013 06:51:23] Byte-for-Byte failure at LBA 76928 offset 0 (0) [VSS backing up to network share]
[23/10/2013 07:57:19] Byte-for-Byte failure at LBA 48986144 offset 0 (16384) [PHYLock backing up to local disk - immediately afterwards with no reboot]
[23/10/2013 08:04:49] Byte-for-Byte failure at LBA 15734271 offset 0 (65024) [identical rerun without reboot]
[23/10/2013 08:11:18] Byte-for-Byte failure at LBA 76928 offset 0 (0) [identical rerun switching back to VSS + local disk]
Does the consistency of "76928" suggest it could be something quite specific and not a random issue?
I haven't tried backing up a comparable second disk to see if that has the same issue, or the same disk accessed as a data disk from a second boot, or IfD/IfL based backup. I also haven't swapped cables over, although dodgy cables would usually lead to BSOD which I'm not getting. So there are options.
Ideally I do want the standard IfW backup to work and would like to solve why it isn't.
I suppose the first thing is to identify what happens if I substitute a different booted OS, IfW install, IfW/IfD/IfL, or backup disk/target disk. But it's a bit hit and miss to just try random fixes. Any suggestions what to look at, or what diagnostic info to get, first?