Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I'm trying to copy a recording I made on Canon DC320 to my computer but I keep crashing with the message The parameter is invalid. I've done some troubleshooting using Process Monitor and xcopy and determined the following:

  • The crash happens at 311,033,856 bytes every time
  • xcopy retries 3 times automatically (I assume this is standard)
  • Buffer size is 65,536 bytes
  • Starting from 257,949,696, every read operation happens twice, the second time with Non-cached, Paging I/O, Synchronous Paging I/O set as I/O flags
  • Windows XP SP3
  • DVD-RW 1.4 GB (Sony)
  • Recorded on a Canon DC320 in high def
  • UDF file system
  • Tried with the same results on a Windows 7 computer

Here's the stack trace from the failing ReadFile command

"0","fltmgr.sys","fltmgr.sys + 0x1888","0xf73cf888","C:\WINDOWS\System32\Drivers\fltmgr.sys"
"1","fltmgr.sys","fltmgr.sys + 0x32a0","0xf73d12a0","C:\WINDOWS\System32\Drivers\fltmgr.sys"
"2","fltmgr.sys","fltmgr.sys + 0x3c48","0xf73d1c48","C:\WINDOWS\System32\Drivers\fltmgr.sys"
"3","fltmgr.sys","fltmgr.sys + 0x4059","0xf73d2059","C:\WINDOWS\System32\Drivers\fltmgr.sys"
"4","ntkrnlpa.exe","ntkrnlpa.exe + 0x181e9","0x804ef1e9","C:\WINDOWS\system32\ntkrnlpa.exe"
"5","ntkrnlpa.exe","ntkrnlpa.exe + 0x18c09","0x804efc09","C:\WINDOWS\system32\ntkrnlpa.exe"
"6","ntkrnlpa.exe","ntkrnlpa.exe + 0x3f734","0x80516734","C:\WINDOWS\system32\ntkrnlpa.exe"
"7","ntkrnlpa.exe","ntkrnlpa.exe + 0x492bd","0x805202bd","C:\WINDOWS\system32\ntkrnlpa.exe"
"8","ntkrnlpa.exe","ntkrnlpa.exe + 0x44541","0x8051b541","C:\WINDOWS\system32\ntkrnlpa.exe"
"9","ntkrnlpa.exe","ntkrnlpa.exe + 0x926dc","0x805696dc","C:\WINDOWS\system32 \ntkrnlpa.exe"
"10","ntkrnlpa.exe","ntkrnlpa.exe + 0x95807","0x8056c807","C:\WINDOWS\system32\ntkrnlpa.exe"
"11","fltmgr.sys","fltmgr.sys + 0x3018","0xf73d1018","C:\WINDOWS\System32\Drivers\fltmgr.sys"
"12","fltmgr.sys","fltmgr.sys + 0x31e4","0xf73d11e4","C:\WINDOWS\System32\Drivers\fltmgr.sys"
"13","fltmgr.sys","fltmgr.sys + 0xeabc","0xf73dcabc","C:\WINDOWS\System32\Drivers\fltmgr.sys"
"14","aswMon2.SYS","aswMon2.SYS + 0x6d86","0xa9dedd86","C:\WINDOWS\System32\Drivers\aswMon2.SYS"
"15","ntkrnlpa.exe","ntkrnlpa.exe + 0xa576c","0x8057c76c","C:\WINDOWS\system32\ntkrnlpa.exe"
"16","ntkrnlpa.exe","ntkrnlpa.exe + 0x6a6cc","0x805416cc","C:\WINDOWS\system32\ntkrnlpa.exe"
"17","kernel32.dll","kernel32.dll + 0x29f4b","0x7c829f4b","C:\WINDOWS\system32\kernel32.dll"
"18","kernel32.dll","kernel32.dll + 0x2912d","0x7c82912d","C:\WINDOWS\system32\kernel32.dll"
"19","kernel32.dll","kernel32.dll + 0x217d0","0x7c8217d0","C:\WINDOWS\system32\kernel32.dll"
"20","ulib.dll","ulib.dll + 0x6da3","0x71fa6da3","C:\WINDOWS\system32\ulib.dll"
"21","xcopy.exe","xcopy.exe + 0x4938","0x1004938","C:\WINDOWS\system32\xcopy.exe"
"22","xcopy.exe","xcopy.exe + 0x511b","0x100511b","C:\WINDOWS\system32\xcopy.exe"
"23","xcopy.exe","xcopy.exe + 0x5d34","0x1005d34","C:\WINDOWS\system32\xcopy.exe"
"24","xcopy.exe","xcopy.exe + 0x5ff7","0x1005ff7","C:\WINDOWS\system32\xcopy.exe"
"25","xcopy.exe","xcopy.exe + 0x6314","0x1006314","C:\WINDOWS\system32\xcopy.exe"
"26","kernel32.dll","kernel32.dll + 0x1776f","0x7c81776f","C:\WINDOWS\system32\kernel32.dll"
share|improve this question
Does it only crash with XCOPY? I mean, if you use MOVE, or a 'normal' copy and paste, does the same issue occur? Also, what does Event Viewer say? – Dave Jan 10 '13 at 11:27
You could try performing the copy using TeraCopy, it lists all the files it tries to copy along with any associated error messages that show up in the process. – Darth Continent Jan 10 '13 at 14:26
@DaveRook I only started using XCOPY in the first place because I got this error with a copy and paste (in Windows Explorer) – just.another.programmer Jan 10 '13 at 16:30

It appears your DVD cannot be read at the offending location. Is it scratched. Have you tried cleaning the surface or using another DVD drive to read it.

share|improve this answer
I checked the disk, it does not look like it has a scratch. I can play the video in the camcorder fine, so I don't think it's a scratch. – just.another.programmer Jan 10 '13 at 16:31

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.