hreinecke / sg3_utils

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sg_raw -r 32k fails on windows

Zibri opened this issue · comments

commented

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.

commented

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