Am 27.05.2018 um 14:52 schrieb Thomas Schmitt:
Is there documentation about what a raw partition can do which the others
cannot ?
I don't know, sorry. I'm not a NetBSD developer. Just ported fre:ac to
the BSDs back then and most of my knowledge is from trying it out and/or
reading the source code.
libburn tries with 'c' and 'd' :
fd = open(path, O_RDWR | O_NDELAY);
...
ret = ioctl(fd, SCIOCIDENTIFY, &addr);
and wants to see after successful ioctl():
addr.type == TYPE_SCSI
From then on, the drive is regarded as usable for SCSI transactions
via ioctl(SCIOCCOMMAND).
Is this too daring ?
I *think* this should work, but it would probably be better to use 'a' +
RAW_PART. Two reasons:
1. Future architectures might define RAW_PART to 4 or something else, so
you'd suddenly get devices like /dev/rcd0e on such systems.
2. Not sure if it's actually possible, but on architectures with
RAW_PART == 3 there might still be a /dev/rcd0c device in some cases,
but with a different meaning. Treating it like a raw disc device could
possibly cause bad things to happen.
----
Robert Kausch
[email protected]
