Re: OVRTAPF/CPYFRMTAP command parameters

["Simon Coulter" <shc@xxxxxxxxxxxxxxxxx>]

Hello Ed,

You wrote:
>Both OVRTAPF and CPYFRMTAP can use such parameters as the device, tape reels
>(label type & number of reels), record length, block length and block format.
>My questions are:

Its been a long while since I did any tape processing also ....

CPYFRMTAP (like all the other specialist CPYxxxx commands) is really a 
front-end to CPYF with unrelated keywords removed.  It effectively issues an 
override for the keywords you specify and everything else defaults to what is 
specified in the tape file.

>1.  If I am using an unmodified system-supplied tape file such as QTAPE or
>QSYSTAP is it necessary to do an OVRTAPF prior to a CPYFRMTAP?

Only if you want to alter attributes that CPYFRMTAP does not expose via a 
keyword.

>2.  If I don't specify OVRTAPF will CPYFRMTAP work if I specify parameters 
>that do not match the values defined in the tape file?

CPYFRMTAP overrides the tape file values according to what you specify on the 
command.

>3.  If I must specify OVRTAPF it is a safe assumption that all of the *TAPF
>defaults in CPYFRMTAP will utilize the overrides, also assuming the override
>scopes are set correctly?

I believe so but you'll need to verify this.  I think the values in the tape 
file, any overrides in effect, and any specified keywords on CPYFRMTAP are 
merged according to the usual rules of overrides.

Regards,
Simon Coulter.

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