2.4.18: filesystem corruption on harddisk when bad sectors on floppydisk (!)

[Folkert van Heusden]

Hi,

When I read from a floppy disk with badsectors and write to a file
on the harddisk, I get filesystem corruption. Filesystem on hard-
disk is ext3. I'm reading the floppy in raw mode (open("/dev/fd0"
etc.).
In dmesg I get:
floppy0: data CRC error: track 32, head 1, sector 7, size 2
floppy0: data CRC error: track 32, head 1, sector 7, size 2
end_request: I/O error, dev 02:00 (floppy), sector 1176
and suddenly the write fails with 22. The file attributes are
suddenly weird:
-rwxr-Sr-T    1 root     root       602112 Jan  3 00:50 ../test
Nothing in the logs.
Kernel version is 2.4.18.
Harddisk is on IDE:
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
PIIX4: IDE controller on PCI bus 00 dev 21
PIIX4: chipset revision 1
PIIX4: not 100% native mode: will probe irqs later
    ide0: BM-DMA at 0xd800-0xd807, BIOS settings: hda:DMA, hdb:pio
hda: ST320413A, ATA DISK drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
No fiddling with hdparm or whatsoever.

Folkert van Heusden

p.s. the rather trivial program I used can be found at:
http://www.vanheusden.com/Linux/recoverdm-0.1.tgz