Date: Thu, 11 Nov 1999 15:42:21 -0800 (PST) From: Matthew Jacob <mjacob@feral.com> To: Simon Shapiro <shimon@simon-shapiro.org> Cc: Randell Jesup <rjesup@wgate.com>, freebsd-arch@freebsd.org Subject: Re: I/O Evaluation Questions (Long but interesting!) Message-ID: <Pine.BSF.4.05.9911111538160.370-100000@semuta.feral.com> In-Reply-To: <382B52F9.2C6D1E00@simon-shapiro.org>
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> AKAIK, you really have to be an NT kernel hacker to get raw i/o.
>
No. It's easily available from userland because all of the NT drivers
still install DOS compatibility names when they configure themselves:
// open the 'D:' drive
HANDLE fh = CreateFile(("\\\\.\\PHYSICALDRIVE3", 0,
FILE_SHARE_READ|FILE_SHARE_WRITE, 0, OPEN_EXISTING, 0, NULL);
if (fh == INVALID_HANDLE_VALUE) {
return (-1);
}
....
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