Can anyone tell me what the following messages mean?

I have an Atlas III 18 Gb drive that's complaining.

These messages correspond much too well with certain drive operations.
(i.e.  I can cause them to happen at will)

I have the drive connected to a Q800 on the internal bus with a
wide -> narrow adapter.  The drive works almost OK, but I'm having trouble
with it dropping bits.  When I stress it, it seems to corrupt data,
and then eventually the kernel panics.

For instance, I can do a newfs on this drive (one very large partition)
and then do a fsck on it.  The fsck will find a problem at the end of its run.
When I tell it to go ahead and fix it, I'll get one of  these messages,
and if I run the fsck again, I'll get the same error.  It's like
the fsck tried to update the disk, and the message corresponds to
the operation failing.

??

Thanks,

-dgl-

P.S.  If anyone is interested, the messages file is available
on ftp://ftp.icompute.com/pub/charm.messages
via anonymous ftp.


Jan  9 23:47:50 charm /netbsd: dmaintr: discarded 13 b (last transfer was 1534 b).
Jan  9 23:47:50 charm /netbsd: esp0: !TC on DATA XFER [intr 10, stat 83, step 4] prevphase 0, resid 5fe
Jan  9 23:47:53 charm /netbsd: dmaintr: discarded 13 b (last transfer was 1534 b).
Jan  9 23:47:53 charm /netbsd: esp0: !TC on DATA XFER [intr 10, stat 83, step 4] prevphase 0, resid 5fe
Jan  9 23:47:54 charm /netbsd: dmaintr: discarded 13 b (last transfer was 1534 b).
Jan  9 23:47:54 charm /netbsd: esp0: !TC on DATA XFER [intr 10, stat 83, step 4] prevphase 0, resid 5fe
Jan  9 23:47:56 charm /netbsd: dmaintr: discarded 13 b (last transfer was 1534 b).
Jan  9 23:47:56 charm /netbsd: esp0: !TC on DATA XFER [intr 10, stat 83, step 4] prevphase 0, resid 5fe
Jan  9 23:47:58 charm /netbsd: dmaintr: discarded 13 b (last transfer was 1534 b).
Jan  9 23:47:58 charm /netbsd: esp0: !TC on DATA XFER [intr 10, stat 83, step 4] prevphase 0, resid 5fe
Jan  9 23:47:58 charm /netbsd: dmaintr: discarded 13 b (last transfer was 1534 b).
Jan  9 23:47:58 charm /netbsd: esp0: !TC on DATA XFER [intr 10, stat 83, step 4] prevphase 0, resid 5fe