Saf-T-Net
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Bob:
I have not yet looked for an answer but while trying to recover a partition
that was trashed a couple of nights ago — and no I don't know who to blame
for sure though "movie" is the current suspect. A well unknown term program
was running but had been idle for hours and an attempt to repeat the event on
a floppy failed to provide any ill events (still have not had time to do the
backup).
Block 0 of the partition had obviously been trashed and while looking
around prior to making any changes to the block, I noticed that every block
0 on every disk or partition had the same checksum and that the checksum
was listed as "bad" by two diskeditors. I did not bother to restore the
complete block and don't think that I could have "forced" the checksum
except by playing with the data which would have been tedious at best. My
real surprise was when after correcting the first 4 bytes and getting a
valid checksum (but of course different from all of the others) the partion
was readable. It appears that the system one, ignores the checksum value
in the first block and two, either does not actually calculate a checksum
for the first block or uses a different formula. Am I dreaming?