From: Matthew Jacob
> Geometry is still important. Trying booting a USB flash drive on all
> BIOS' with a 63/255 geometry instead of a 64/32 geometry.
At least most modern BIOSes I've had to deal with can be configured to
use packet mode which makes the problem go away... Don't know if I'm
luc
On Fri, 10 Dec 2010, Bruce Cran wrote:
On Fri, 10 Dec 2010 10:12:34 +1100 (EST)
Bruce Evans wrote:
The BIOS has little control over the mode. It can't enforce LBA if
the drive supports CHS. It can't force any particular CHS mode since
the driver may set any CHS mode. ata used to reset the
On Fri, 10 Dec 2010, Erik Trulsson wrote:
On Thu, Dec 09, 2010 at 10:14:58PM +, Bruce Cran wrote:
On Thu, 9 Dec 2010 19:58:56 +1100 (EST)
Bruce Evans wrote:
I had understood the ATA_FLAG_54_58 backwards. It tells us if the
drive is not so old that it doesn't support IDENTIFY records for
On Fri, 10 Dec 2010 10:12:34 +1100 (EST)
Bruce Evans wrote:
> The BIOS has little control over the mode. It can't enforce LBA if
> the drive supports CHS. It can't force any particular CHS mode since
> the driver may set any CHS mode. ata used to reset the drive in the
> probe and in reinit.
On Fri, 10 Dec 2010 02:00:23 +0100
Erik Trulsson wrote:
> Modern drives do not really report 'the current CHS geometry'. They
> report a fake geometry that normally do not have anything do with the
> actual geometry. (As an example just about all modern ATA/SATA drives
> report having 16 heads,
on 10/12/2010 03:10 Erik Trulsson said the following:
> On Fri, Dec 10, 2010 at 12:36:57AM +0200, Andriy Gapon wrote:
>> on 10/12/2010 00:14 Bruce Cran said the following:
>>> Since it appears that disks are still using the CHS fields despite
>>> having been obsolete since ATA-7 I guess it makes se
On Fri, Dec 10, 2010 at 12:36:57AM +0200, Andriy Gapon wrote:
> on 10/12/2010 00:14 Bruce Cran said the following:
> > Since it appears that disks are still using the CHS fields despite
> > having been obsolete since ATA-7 I guess it makes sense to continue
> > printing them.
>
> I apologize for r
On Thu, Dec 09, 2010 at 10:14:58PM +, Bruce Cran wrote:
> On Thu, 9 Dec 2010 19:58:56 +1100 (EST)
> Bruce Evans wrote:
>
> > I had understood the ATA_FLAG_54_58 backwards. It tells us if the
> > drive is not so old that it doesn't support IDENTIFY records for
> > words 54-58. I think we rar
On Thu, 9 Dec 2010, Bruce Cran wrote:
On Thu, 9 Dec 2010 19:58:56 +1100 (EST)
Bruce Evans wrote:
I had understood the ATA_FLAG_54_58 backwards. It tells us if the
drive is not so old that it doesn't support IDENTIFY records for
words 54-58. I think we rarely get here. Drives old enough to
on 10/12/2010 00:55 Kostik Belousov said the following:
> On Fri, Dec 10, 2010 at 12:36:57AM +0200, Andriy Gapon wrote:
>> on 10/12/2010 00:14 Bruce Cran said the following:
>>> Since it appears that disks are still using the CHS fields despite
>>> having been obsolete since ATA-7 I guess it makes
On Fri, Dec 10, 2010 at 12:36:57AM +0200, Andriy Gapon wrote:
> on 10/12/2010 00:14 Bruce Cran said the following:
> > Since it appears that disks are still using the CHS fields despite
> > having been obsolete since ATA-7 I guess it makes sense to continue
> > printing them.
>
> I apologize for r
on 10/12/2010 00:14 Bruce Cran said the following:
> Since it appears that disks are still using the CHS fields despite
> having been obsolete since ATA-7 I guess it makes sense to continue
> printing them.
I apologize for repeating myself, that probably starts to be annoying...
We read some reser
On Thu, 9 Dec 2010 19:58:56 +1100 (EST)
Bruce Evans wrote:
> I had understood the ATA_FLAG_54_58 backwards. It tells us if the
> drive is not so old that it doesn't support IDENTIFY records for
> words 54-58. I think we rarely get here. Drives old enough to use
> CHS may be so old that they do
On Wed, 8 Dec 2010, Bruce Cran wrote:
On Wed, 8 Dec 2010 16:46:17 +1100 (EST)
Bruce Evans wrote:
- for ATA drives, it uses the "firmware" geometry supplied by the
drive firmware. The ATA standard specifies this to be H=16/S=63 for
all drives larger than a certain size (IIRC, about 8GB, which
On Wed, 8 Dec 2010 16:46:17 +1100 (EST)
Bruce Evans wrote:
> - for ATA drives, it uses the "firmware" geometry supplied by the
> drive firmware. The ATA standard specifies this to be H=16/S=63 for
> all drives larger than a certain size (IIRC, about 8GB, which is the
> size at which the better d
On Wed, 8 Dec 2010, Andriy Gapon wrote:
on 08/12/2010 01:11 Matthew Jacob said the following:
Geometry is still important. Trying booting a USB flash drive on all BIOS' with
a 63/255 geometry instead of a 64/32 geometry.
Well, I don't know anything about USB...
My point about modern HDDs sti
On Tue, 7 Dec 2010, Bruce Cran wrote:
On Tue, 07 Dec 2010 23:54:17 +0200
Andriy Gapon wrote:
You repeated that statement, so I am picking on you :-)
Can someone show me how/where exactly modern drives fakes CHS
geometry? Let me specifically ask that question about modern (S)ATA
drives directl
On Wed, 8 Dec 2010, Andriy Gapon wrote:
on 08/12/2010 00:05 Matthew Jacob said the following:
On 12/7/2010 1:54 PM, Andriy Gapon wrote:
on 07/12/2010 22:46 Bruce Cran said the following:
Don't warn if a partition appears not to be aligned on a track boundary.
Modern disks use LBA and
on 08/12/2010 01:11 Bruce Cran said the following:
> On Tue, 7 Dec 2010 23:06:24 +
> Bruce Cran wrote:
>> I guess the fields are still defined to keep old tools happy.
>
> I mean that values are still returned by the drive firmware,
> while they could be left zero according to the spec. For e
on 08/12/2010 01:11 Matthew Jacob said the following:
> Geometry is still important. Trying booting a USB flash drive on all BIOS'
> with
> a 63/255 geometry instead of a 64/32 geometry.
Well, I don't know anything about USB...
My point about modern HDDs still stands.
> On 12/7/2010 2:14 PM, An
Geometry is still important. Trying booting a USB flash drive on all
BIOS' with a 63/255 geometry instead of a 64/32 geometry.
On 12/7/2010 2:14 PM, Andriy Gapon wrote:
on 08/12/2010 00:05 Matthew Jacob said the following:
On 12/7/2010 1:54 PM, Andriy Gapon wrote:
on 07/12/2010 22:46 Bruce
On Tue, 7 Dec 2010 23:06:24 +
Bruce Cran wrote:
> I guess the fields are still defined to keep old tools happy.
I mean that values are still returned by the drive firmware,
while they could be left zero according to the spec. For example a new
1TB ATA-8 drive returns a geometry of 16H/63S/163
On Tue, 07 Dec 2010 23:54:17 +0200
Andriy Gapon wrote:
> You repeated that statement, so I am picking on you :-)
> Can someone show me how/where exactly modern drives fakes CHS
> geometry? Let me specifically ask that question about modern (S)ATA
> drives directly connected to a system (controlle
On 12/7/2010 1:54 PM, Andriy Gapon wrote:
on 07/12/2010 22:46 Bruce Cran said the following:
Don't warn if a partition appears not to be aligned on a track boundary.
Modern disks use LBA and create a fake CHS geometry that doesn't have any
relation to the on-disk layout of data.
You
on 08/12/2010 00:05 Matthew Jacob said the following:
>
>
> On 12/7/2010 1:54 PM, Andriy Gapon wrote:
>> on 07/12/2010 22:46 Bruce Cran said the following:
>>>Don't warn if a partition appears not to be aligned on a track boundary.
>>>Modern disks use LBA and create a fake CHS geometry th
on 07/12/2010 22:46 Bruce Cran said the following:
> Don't warn if a partition appears not to be aligned on a track boundary.
> Modern disks use LBA and create a fake CHS geometry that doesn't have any
> relation to the on-disk layout of data.
You repeated that statement, so I am picking on
Author: brucec
Date: Tue Dec 7 20:46:11 2010
New Revision: 216269
URL: http://svn.freebsd.org/changeset/base/216269
Log:
Don't warn if a partition appears not to be aligned on a track boundary.
Modern disks use LBA and create a fake CHS geometry that doesn't have any
relation to the on-disk
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