Messages in this thread | | | From | Dan Yocum <> | Subject | Re: over 5Gb missing from a 13.5Gb disk | Date | Tue, 07 Dec 1999 11:46:09 -0600 |
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> On Sun, 5 Dec 1999, Kristofer T. Karas wrote: > > > Wichert Akkerman wrote: > > > >> I'm having a problem with a new IBM IDE disk I just bought > >> Model=IBM-DJNA-371350, FwRev=J76OA30K, SerialNo=GM0GM088910 > >> Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs } > >> RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=34 > > ^^^^^^^^^^^ > > > > There's your problem. The number of cylinders is here is causing problems, as > > it is clamped to 2^14. Most BIOSes let you lower this number by increasing the > > number of phony heads to 255. > > Nonsense. > All large disks will show RawCHS=16383/16/63, entirely independent of the > BIOS (which is not involved at all). It is the ATA standard.
I don't know if this has been pointed out yet, but Wichert should go read the Large-Disk mini-HOWTO which is authored by Andries. It has lots of good stuff in it including an explanation of the 16383 cylinder business.
Of course, I haven't run into this problem after migrating to the 2.2.x kernels.
Cheers, Dan
___________________________________________________________________________ Dan Yocum | Phone: (630) 840-8525 Linux Research and Development | Fax: (630) 840-6345 Computing Division, OSS Dept. | email: yocum@fnal.gov .~. L Fermi National Accelerator Lab | WWW: www-oss.fnal.gov/~yocum/ /V I P.O. Box 500 | // \ N Batavia, IL 60510 | "TANSTAAFL" /( ) U ________________________________|_________________________________ ^`~'^__X_
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