Date: Mon, 26 May 2008 22:56:50 -0500 From: "Rick C. Petty" <rick-freebsd@kiwi-computer.com> To: Marauder <marauder@pi.avalonnetworks.us> Cc: freebsd-geom@freebsd.org Subject: Re: Unable to write to drive Message-ID: <20080527035650.GA68298@keira.kiwi-computer.com> In-Reply-To: <48357420.5689.0089.0@pi.avalonnetworks.us> References: <48357420.5689.0089.0@pi.avalonnetworks.us>
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On Thu, May 22, 2008 at 01:24:49PM -0600, Marauder wrote:
>
> I have a problem that is driving me crazy. Hopefully I'm submitting this question to the correct place.
>
> My problem is... I have opened the drive /dev/ad0 with open("/dev/ad0", O_WRONLY) and it return's a valid file descriptor. The I attempt to write using the file descriptor returned. The write fails with errno=22 (EINVAL)
What does your write instruction look like? I don't know if this still
applies, but writes used to fail if not an integer multiple of 512 bytes in
length.
> I have attempted to first open /dev/io with READ/WRITE access to see if that help's. No luck
I believe the io(4) device is used to directly access the I/O ports via the
assembly instructions IN, INS, OUT, OUTS, CLI, and STI. This device is not
used to gain privs on other devices.
-- Rick C. Petty
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