Re: 2.2.0pre5/6 IDE disk geometry detection problem

Marko Siladin (msiladin@athos.mas.vcu.edu)
Tue, 12 Jan 1999 10:51:35 -0500 (EST)

>
> From: marko@207-172-63-169.s169.tnt3.rcm.erols.com (Marko Siladin)
>
> in 2.1.131 cat /proc/ide/hda/geometry results in:
> physical 4092/16/63
> logical 847/128/63
>
> in 2.2.0 pre5/6 I get :
> physical 4092/16/63
> logical 511/128/63
>
> the actual physical geometry of the disk is 6780/16/63
> so both kernels get that one wrng - but at least the 2.1.131
> get the logical correctly (from the BIOS)
>
> Hmm. Such things can happen. For example, I could imagine
> that the BIOS has 847/128/63, CurCHS has 4092/16/63,
> and RawCHS and LBAsects have certain suitable values
> such that the end result is as you describe above.
> Still I would be interested in the results of hdparm -i /dev/hda
> and hdparm -I /dev/hda both for 2.1.131 and for 2.2.0 pre5/6.
>
> Andries - aeb@cwi.nl
>

it looks like the results of te hdparm are the same. My guess is that
2.1.131 get the logical params from the BIOS and 2.2.0pre5/6 calculates
them from the physical ones. I'll try to set the geometry manually
tonight

zaphod# cat /proc/version
Linux version 2.1.131 (root@zaphod) (gcc version 2.7.2.3) #3 SMP Wed Dec 23 00:11:54 EST 1998

zaphod# hdparm -i /dev/hda

/dev/hda:

Model=FUJITSU MPA3035ATU, FwRev=9517, SerialNo=01113969
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }
RawCHS=4092/16/63, TrkSize=0, SectSize=0, ECCbytes=4
BuffType=0(?), BuffSize=0kB, MaxMultSect=32, MultSect=32
DblWordIO=no, maxPIO=2(fast), DMA=yes, maxDMA=0(slow)
CurCHS=4092/16/63, CurSects=4124736, LBA=yes, LBAsects=4124736
tDMA={min:120,rec:120}, DMA modes: mword0 mword1 *mword2
IORDY=yes, tPIO={min:240,w/IORDY:120}, PIO modes: mode3 mode4

zaphod# hdparm -I /dev/hda

/dev/hda:

Model=UFIJST UPM3A30A5UT , FwRev=5971 , SerialNo=
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }
RawCHS=4092/16/63, TrkSize=0, SectSize=0, ECCbytes=4
BuffType=0(?), BuffSize=0kB, MaxMultSect=32, MultSect=32
DblWordIO=no, maxPIO=2(fast), DMA=yes, maxDMA=0(slow)
CurCHS=4092/16/63, CurSects=4124736, LBA=yes, LBAsects=4124736
tDMA={min:120,rec:120}, DMA modes: mword0 mword1 *mword2
IORDY=yes, tPIO={min:240,w/IORDY:120}, PIO modes: mode3 mode4

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

zaphod# cat /proc/version
Linux version 2.2.0-pre6 (root@zaphod) (gcc version 2.7.2.3) #9 SMP Sat Jan 9 23:41:54 EST 1999

zaphod# hdparm -i /dev/hda

/dev/hda:

Model=FUJITSU MPA3035ATU, FwRev=9517, SerialNo=01113969
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }
RawCHS=4092/16/63, TrkSize=0, SectSize=0, ECCbytes=4
BuffType=0(?), BuffSize=0kB, MaxMultSect=32, MultSect=off
DblWordIO=no, maxPIO=2(fast), DMA=yes, maxDMA=0(slow)
CurCHS=511/128/63, CurSects=4124736, LBA=yes, LBAsects=4124736
tDMA={min:120,rec:120}, DMA modes: mword0 mword1 *mword2
IORDY=yes, tPIO={min:240,w/IORDY:120}, PIO modes: mode3 mode4

zaphod# hdparm -I /dev/hda

/dev/hda:

Model=UFIJST UPM3A30A5UT , FwRev=5971 , SerialNo=
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }
RawCHS=4092/16/63, TrkSize=0, SectSize=0, ECCbytes=4
BuffType=0(?), BuffSize=0kB, MaxMultSect=32, MultSect=?0?
DblWordIO=no, maxPIO=2(fast), DMA=yes, maxDMA=0(slow)
CurCHS=4092/16/63, CurSects=4124736, LBA=yes, LBAsects=4124736
tDMA={min:120,rec:120}, DMA modes: mword0 mword1 *mword2
IORDY=yes, tPIO={min:240,w/IORDY:120}, PIO modes: mode3 mode4 

-- 
...Marko
------------------------///////////-\\\\\\\\\\\--------------------------
                              (O) ^ ^ (O)    If you are going to reinvent
Marko Siladin                    | | |  the wheel, don't make it a square
msiladin@athos.mas.vcu.edu        \ /        - John Carmack,  id Software 
           http://athos.mas.vcu.edu/grad/marko/home.html
------------------------\\\\\\\\\\\-///////////--------------------------  


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