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hreinecke / sg3_utils

Deprecated git-svn mirror for sg3_utils
http://sg.danny.cz/sg/sg3_utils.html
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sg_raw -r 32k fails on windows #90

Closed Zibri closed 1 year ago

Zibri commented 1 year ago

sg_raw -r 32K or -r 32768 fails on windows while -r 32767 works.

There must be some int/uint problem before the deviceiocontrol The same command works on cygwin.

I checked the code of wg_raw and the problem does not seem to be there.. perhaps it's in the library... I'll check further and let you know.

Zibri commented 1 year ago

Ok.. my bad... As stated in sg_pt_win32.c:

  • N.B. MSDN says that the "SPT" interface (i.e. double buffered)
    • should be used for small amounts of data (it says "< 16 KB").
    • The direct variant (i.e. IOCTL_SCSI_PASS_THROUGH_DIRECT) should
    • be used for larger amounts of data but the buffer needs to be
    • "cache aligned". Is that 16 byte alignment or greater?

So for 32k to work, it must be compiled WITHOUT --enable-win32-spt-direct or with --disable-win32-spt-direct