RE: determining a tape's blocksize on a *NL tape

["Prowak, Dave" <DProwak@xxxxxxxxxxxxxxxxx>]

On a MF, when you set the BlkSize = 0, the program determines
the optimum BlkSize.

Don's advice about DmpTap was right on the nose.

Even though I was dealing with a *NL tape, DmpTap provided the
BlkSize.

Thanks to everyone who responded!
Dave

-----Original Message-----
From: Pat Barber [mailto:mboceanside@worldnet.att.net]
Sent: Friday, May 03, 2002 11:21 AM
To: midrange-l@midrange.com
Subject: Re: determining a tape's blocksize on a *NL tape


Unless MVS has changed a WHOLE lot, a block size of 0 is not possible.

You can have block=recsize, which is effectively NO blocking, but
ZERO is not a option. I make a "BIG" assumption that this tape was
created on a IBM mainframe.

You should be able to dump the tape and figure out blocksize....


"Prowak, Dave" wrote:
>
> This message is in MIME format. Since your mail reader does not understand
> this format, some or all of this message may not be legible.
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> Hi,
>
> Here's the short story - A procedure to load recs from a tape went down
> recently.
> The provider of the tape (mainframe) changed the blocksize from 128 to 0.
> With a blocksize of 0,
> the program determines the optimum blocksize given a rcdlen of 128.
>
> It's a no-label tape.  How do I determine the blocksize used?
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