HP3000-L Archives

July 2001, Week 2

HP3000-L@RAVEN.UTC.EDU
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Subject:
Re: Block size
From:
Jerry Fochtman <[log in to unmask]>
Reply To:
Jerry Fochtman <[log in to unmask]>
Date:
Fri, 13 Jul 2001 06:31:26 -0500
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At 04:36 PM 7/12/01 -0700, Stan Sieler wrote:
>1. 255 is the max because somewhere the Classic HP 3000 probably used an 8 bit
>    field to remember the info.  A cursory check fails to show where this
> might
>    have been.

According to my MPE-V tables manual, blocking factor was contained in
1-byte located in the file's File Control Block (FCB).  The text further
indicates that the only legal values were 1-255.  If I recall, it was
derived at open by dividing the block size by record length from the
file label.

My MPE-3 tables manual is in a different storage box...

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