lkml.org 
[lkml]   [2011]   [Sep]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: BUG in kernel: Wrong Handling of USB HDD’s in scsiglue(slave_configure) and scsi/sd(sd_read_cache_type)
From
Date
On Thu, 2011-09-29 at 13:27 -0500, James Bottomley wrote:
> On Thu, 2011-09-29 at 14:49 +0530, Amit Sahrawat wrote:
> > The patch did not work, although it did get pass the earlier condition
> > which I mentioned- but still Write Cache is not taken into account –
> > seems mode sensing in sd_read_cache_type() does not send proper
> > request to the device – or does not read in proper bytes for this(as
> > per hdparm command analysis):
> >
> > Logs After Connecting:
> > scsi 0:0:0:0: Direct-Access Seagate Portable 0130 PQ: 0 ANSI: 4
> > sd 0:0:0:0: [sda] 488397168 512-byte logical blocks: (250 GB/232 GiB)
> > sd 0:0:0:0: [sda] Write Protect is off
> > sd 0:0:0:0: [sda] No Caching mode page present
>
> This line means that a request for page 0x0 didn't turn up the caching
> mode page in the list of supported pages.
>
> What does
>
> sg_inq --page=0x0 /dev/sda

Um, lets try that again, this time with the correct information. What
we're looking for is the list of mode pages, so

sg_modes --page=0x3f /dev/sda

Should return it.

Thanks,

James


--
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: 2011-09-29 20:33    [W:0.098 / U:0.384 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site