Multiwrite IDE breaks on disk error [from Jobs list]

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Cut from Alan's Job list:

> To Check
> --------
> Multiwrite IDE breaks on a disk error [minor issue at best]

In the FWIW dept it effects reads as well as writes. Easy to reproduce
given an appropriate disk. With one bad block and hdparm -m0 followed by
badblocks you get (as expected) one bad block reported. With hdparm -mN
(where N>1) you get increasing #'s of b-blocks reported with increasing N.

This box had kernel 2.3.42 on it at the time, ide-disk.c hasn't changed
in the multiple read/write dep't since then AFAICT. This is output from
"dmesg -c|grep CHS" after running badblocks for multcount = N. Drive is
old 100MB (yes one-hundred) Conner IDE with single stable bad sector.

multcount = 0:
hda: read_intr: error=0x80 { BadSector }, CHS=230/1/12, sector=60763
hda: read_intr: error=0x80 { BadSector }, CHS=230/1/12, sector=60763

multcount = 8:
hda: read_intr: error=0x80 { BadSector }, CHS=230/1/12, sector=60760
hda: read_intr: error=0x80 { BadSector }, CHS=230/1/12, sector=60762
hda: read_intr: error=0x80 { BadSector }, CHS=230/1/12, sector=60762

multcount = 16:
hda: read_intr: error=0x80 { BadSector }, CHS=230/1/12, sector=60752
hda: read_intr: error=0x80 { BadSector }, CHS=230/1/12, sector=60754
hda: read_intr: error=0x80 { BadSector }, CHS=230/1/12, sector=60756
hda: read_intr: error=0x80 { BadSector }, CHS=230/1/12, sector=60758
hda: read_intr: error=0x80 { BadSector }, CHS=230/1/12, sector=60760
hda: read_intr: error=0x80 { BadSector }, CHS=230/1/12, sector=60762
hda: read_intr: error=0x80 { BadSector }, CHS=230/1/12, sector=60754
hda: read_intr: error=0x80 { BadSector }, CHS=230/1/12, sector=60756
hda: read_intr: error=0x80 { BadSector }, CHS=230/1/12, sector=60758
hda: read_intr: error=0x80 { BadSector }, CHS=230/1/12, sector=60760
hda: read_intr: error=0x80 { BadSector }, CHS=230/1/12, sector=60762

Paul.

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• Next message: Eric S. Raymond: "Actual environment size comparison of CML1 and CML2"
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