I have encountered some really strange oddities with
my two-year-old FUJITSU MPB3032ATU 3,2Gb ide-drive.
Until yesterday I did not bother about the drive
at all -- it simply worked. It was partitioned
for use with W98 (1 GB) and Linux (2GB) and worked
fine with both.
Then I bought a new drive and though formatting
my old drive and making it use ext2fs would be a good
idea... 8-)
First of all, the kernel-messages and an "hdparm"
output:
==> Kernel:
> hdc: FUJITSU MPB3032ATU, ATA DISK drive
> hdc: FUJITSU MPB3032ATU, 2014MB w/0kB Cache, CHS=4092/16/63, (U)DMA
==> hdparm
michael:/usr/src/linux # hdparm -i /dev/hdc
/dev/hdc:
Model=FUJITSU MPB3032ATU, FwRev=2009, SerialNo=01138683
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=16, MultSect=off
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
As you can see, the drive does not get recognised correctly.
The CHS should be more like 6704/15/63 (as printed on top of the
drive and entered as BIOS/CMOS values) to get 3,2Gb
-- with 4092/16/63 it only gets 2Gb.
Due to this, I cannot use (Linux)"fdisk" to partition the drive
correctly. It refuses to accept my "false" values for the
partition edges.
Now comes the tricky part: when I use (win98)"fdisk", I can
make one big "fat32"-3,2Gb-partition, the program seems to take the
BIOS values and not the values the drive is perhaps reporting.
After formatting, it seems that everything is fine.
When I now start Linux the drive still does not get
recognised correctly but I can use it to the full 3,2GB. I
tried to write 32 100Mb files to it and succeeded.
Btw: when I try to read any of the 12 files that lie behind
the 2Gb barrier, Win98 fails badly, e.g. completly crashes
the machine.
Ok, I now have the following situation: a drive that was
partitioned and formatted with Win98-tools fails with
Win98 but can be completely used with Linux (fat32 formatted),
even if Linux fails to correctly recognize it.
Any ideas of how to solve the problem?
CU,
Michael.
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