bread error with dump

[Janine A. Roeth]

Hello,

For the first time in my life, I've gotten the following error from dump:

  <stuff deleted>
  DUMP: (This should not happen)bread from /dev/rxd1g [block 997600]: count=8192
, got=-1
  DUMP: 68.36% done, finished in 0:06
  DUMP: (This should not happen)bread from /dev/rxd1g [block 1028326]: count=512
0, got=-1
  DUMP: (This should not happen)bread from /dev/rxd1g [block 1028336]: count=819
2, got=-1
  DUMP: 92.57% done, finished in 0:01
  DUMP: (This should not happen)bread from /dev/rxd1g [block 990336]: count=8192
, got=-1
  DUMP: (This should not happen)bread from /dev/rxd1g [block 992144]: count=8192
, got=-1

This is happening consistently. Are these bad blocks that I need to map out?
I'm sure this is a straightforward thing that many of you have seen before....

I'm on a Sun 4/260 running SunOS 4.0.3.

Please respond to jar at apple.com.

Thanks,
Janine A. Roeth
Apple Computer, Inc.