svn commit: r216269 - head/sys/geom/part

Andriy Gapon avg at
Fri Dec 10 08:42:15 UTC 2010

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 sense to continue
>>> printing them.


>> I apologize for repeating myself, that probably starts to be annoying...
>> We read some reserved/unused/obsolete bytes and get some garbage in them.
>> The fact that the garbage looks like "valid" (for some definition of "valid")
>> CHS parameters doesn't mean that those are really valid, or CHS parameters, or
>> we should use them, or we should even report them, even for debug.
>> That's my personal position and I am sticking to it :-)
> No. Those bytes may be obsolete, and might be reserved by the latest
> version(s) of the ATA standard, but they are not unused and they do not
> contain garbage.  They do contain CHS parameters as set by the drive
> manufacturers, and should continue to be reported as such by the tools
> we have that provide disk information.

So, your personal belief/interpretation against mine, fair enough.
Can't add anything except go to $Label1.

Andriy Gapon

More information about the svn-src-all mailing list