lkml.org 
[lkml]   [2000]   [Jan]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: IDE drives with > 65535 cylinders
Date
kernel 2.2.14 has support for large drives I believe.
you can check this on www.linux.org.uk: release notes

(it´s possible to get the 37er running with 2.2.13 but only with kernel
patches etc.)

fiddling with fdisk won´t work.

is this a SMP machine?

-----Ursprüngliche Nachricht-----
Von: "Tim Potter" <Tim.Potter@anu.edu.au>
An: <linux-kernel@vger.rutgers.edu>
Gesendet: Mittwoch, 19. Januar 2000 01:27
Betreff: IDE drives with > 65535 cylinders


Hello. I've got a couple of IBM 35.7 GB DeskStar IDE drives which
seem to confuse Linux and fdisk as they report >65535 cylinders when
probed.

hde: IBM-DPTA-353750, 35772MB w/1961kB Cache, CHS=72680/16/63
hdf: IBM-DPTA-353750, 35772MB w/1961kB Cache, CHS=72680/16/63
hdg: IBM-DPTA-353750, 35772MB w/1961kB Cache, CHS=72680/16/63

Now fdisk gets really confused as the HDIO_GETGEO ioctl returns
(unsigned short)drive->bios_cyl which is equal to 72680 % 65535 = 7145
cylinders. This is about 10% of the actual drive capacity.

It's possible to use the fdisk expert menu to fool around with the CHS
settings and create a usable partition, but afterwards fdisk *still*
gets things wrong with respect to the actual number of cylinders on
the drive although by a slightly different margin - 8191.

Is there any reason why there is a 32-bit limit on the number of
cylinders apart from the ATAPI spec? (-: It would be nice to have
Linux support these drives straight off.


Tim.

--
Tim Potter, System Admin/Programmer "This could lead to
Advanced Computational Systems CRC, RSISE Bldg excellence, or
Australian National University, Canberra 0200, serious injury."
AUSTRALIA Ph: +61 2 62798813 Fax: +61 2 62798602 --They Might Be Giants

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



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

\
 
 \ /
  Last update: 2005-03-22 13:56    [W:0.038 / U:0.608 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site