[sebhc] H89 BOOT SUCCESS

[dwight elvey]

>From: "Barry Watzman" <Watzman at neo.rr.com>
>
>Re: "A surprise to most is that these stray magnetic fields have a greater
>effect on writing to the disk than they do to readingthe disk"
>
>I don't think that this is literally correct.  But keep in mind that 
>writing
>requires reading first (the process of writing requires reading the sector
>headers before the actual writing begins).
>
Hi Barry
I can read from the disk without error but as soon as the disk is
written, it can no longer be read from. I've seen this several
times and even experimented a little, to varify this.
I suspect that the frequency is not high enough to get through
the preamps on the drives. The read heads are only looking for
sharp transisions.
Writing needs to have a specific static level. Deviate from that
level and no data is written.
This is my guess.
Dwight

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