Re: IBM HDAPS things are looking up

[Lenz Grimmer <lenz@grimmer.com>]

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Hi Jens!

Thanks for the sample code. I've trimmed the recipient list a bit...

Jens Axboe wrote:

> Perhaps the IDLE or IDLEIMMEDIATE commands imply a head parking, that
> would make sense. As you say, you can hear a drive parking its head.
> Here's a test case, it doesn't sound like it's parking the hard here.

Not here either, but let me check, if I understand this correctly:

> #include <stdio.h>
> #include <unistd.h>
> #include <fcntl.h>
> #include <sys/ioctl.h>
> #include <linux/hdreg.h>
> 
> int main(int argc, char *argv[])
> {
> 	char cmd[4] = { 0xe1, 0, 0, 0 };

The "0xe1" in here is what is defined as "WIN_IDLEIMMEDIATE" in hdreg.h,
correct?

> 	int fd;
> 
> 	if (argc < 2) {
> 		printf("%s <dev>\n", argv[0]);
> 		return 1;
> 	}
> 
> 	fd = open(argv[1], O_RDONLY);

Hmm, don't I need to actually have *write* access for sending an ioctl?

> 	if (fd == -1) {
> 		perror("open");
> 		return 1;
> 	}
> 
> 	if (ioctl(fd, HDIO_DRIVE_CMD, cmd))
> 		perror("ioctl");
> 
> 	close(fd);
> 	return 0;
> }

I will give it another try, after clarifying the above questions - maybe
there is a command that will perform the desired task. If not, I guess
we're back at snooping what the Windows driver does here...

Bye,
	LenZ
- --
- ------------------------------------------------------------------
 Lenz Grimmer <lenz@grimmer.com>                             -o)
 [ICQ: 160767607 | Jabber: LenZGr@jabber.org]                /\\
 http://www.lenzg.org/                                       V_V
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