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Date: Tue, 14 Sep 2004 09:15:56 +0200
From: Jens Axboe <axboe@suse.de>
To: "C.Y.M." <syphir@syphir.sytes.net>
Cc: linux-kernel@vger.kernel.org, "'Alan Cox'" <alan@lxorguk.ukuu.org.uk>
Subject: Re: Changes to ide-probe.c in 2.6.9-rc2 causing improper detection
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On Tue, Sep 14 2004, Jens Axboe wrote:
> They do support it, they just don't flag the support in the capability
> flags. And of course some don't support it at all, you can try this on
> your drives if you want to know for sure.

Forgot to attach the code, here it is...

#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <sys/ioctl.h>
#include <linux/hdreg.h>

int main(int argc, char *argv[])
{
	char args[7];
	int fd;

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

	fd = open(argv[1], O_RDONLY | O_NONBLOCK);
	if (fd == -1) {
		perror("open");
		return 2;
	}

	memset(args, 0, 7);
	args[0] = 0xE7;

	printf("issuing FLUSH_CACHE: ");
	if (ioctl(fd, HDIO_DRIVE_TASK, args) == -1)
		printf("failed 0x%x/0x%x!\n", args[0], args[1]);
	else
		printf("worked\n");

	memset(args, 0, 7);
	args[0] = 0xEA;

	printf("issuing FLUSH_CACHE_EXT: ");
	if (ioctl(fd, HDIO_DRIVE_TASK, args) == -1)
		printf("failed 0x%x/0x%x!\n", args[0], args[1]);
	else
		printf("worked\n");

	close(fd);
	return 0;
}

-- 
Jens Axboe

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