lkml.org 
[lkml]   [2007]   [Jan]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: 2.6.20-rc2+: CFQ halving disk throughput.
Tejun Heo wrote:
> Mark Lord wrote:
>
>>> Support for IDENTIFY PACKET DEVICE would be nice too.
>> It already does that, using HDIO_DRIVE_CMD to retrieve it
>> in the same way as for regular IDENTIFY DEVICE commands.
>
> Hmmm... My hdparm doesn't seem to do that.

Sure it does.
Try "strace hdparm -I /dev/sr0" and notice the two ioctl() calls.

The problem is that libata/SCSI always fail it for some reason.
Ditto for me right now when I tried it with an SG_IO passthru command.

Contrary to my other posting, I actually *do* have a libata-controlled
DVD/RW drive in my box here. So I'll try and see what's happening.

Still digging..
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-01-02 19:13    [W:0.312 / U:0.188 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site