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    SubjectRe: over 5Gb missing from a 13.5Gb disk

    The kernel does not report back to hdparm the "corrected" raw or current
    values of geometry...

    purcell:/proc/ide/hda # cat geometry
    physical 26853/16/63
    logical 1684/255/63
    raw 16383/16/63 < additions added to prove the point >
    current 16383/16/63 < additions added to prove the point >

    Now go cat /proc/ide/hd(X)/geometry
    Then tell us that answer...please.


    Model=QUANTUM FIREBALLP KA13.6, FwRev=A42.0400, SerialNo=36290893
    Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
    RawCHS=16383/16/63, TrkSize=32256, SectSize=21298, ECCbytes=4
    BuffType=3(DualPortCache), BuffSize=371kB, MaxMultSect=16, MultSect=16
    DblWordIO=no, maxPIO=2(fast), DMA=yes, maxDMA=2(fast)
    CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=27067824
    tDMA={min:120,rec:120}, DMA modes: mword0 mword1 mword2
    IORDY=on/off, tPIO={min:120,w/IORDY:120}, PIO modes: mode3 mode4


    Andre Hedrick
    The Linux IDE guy

    On Mon, 6 Dec 1999, Jyan-Min Fang wrote:

    > check this URL
    >
    > http://www.storage.ibm.com/techsup/hddtech/djna/djnades.htm
    >
    > look at the logical layout section.
    >
    > Bottom line: you need to change the CHS to, either 1650/255/63 or
    > 26310/16/63.
    >
    > Jyan-Min Fang
    >
    > 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. With heads set to 255, your CHS values would be
    > > 1650/255/63, which the BIOS and FDISK (and thence the kernel) will understand.
    > > Try playing around with the disk geometry parameters in your BIOS to change the
    > > large/normal/lba setting until you achieve those values. (But note: if you
    > > have Windoze installed, you'll need to back up your disk and reinstall, as it
    > > changes the mappings!)
    > >
    > > Kris
    > >
    > >
    > >
    > > -
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    > > the body of a message to majordomo@vger.rutgers.edu
    > > Please read the FAQ at http://www.tux.org/lkml/
    > >
    >
    >
    > -
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    >


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