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Re: IND$FILE Binary of Module

 

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Sorry, for the premature post been on Facebook and hit cntrl+enter..

Now for proper info¡­

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Drew,

I believe that Hercules does support socket readers.

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via NETCAT as well as FISH¡¯s HERCRDR and of course the SIXPACK has VMARC (not sure if it is on the LCM machine)¡­

¡­ but NETCAT is flagged as MALWARE by many Windows AV utilities¡­

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.. the big advantages of these things is that they preserve the record format of the files without any work, which is what you need for some files¡­

.. VMARC also scores well as it can take input from the reader and output to the punch. This is really useful as disk files in VM/370 are limited to 32k records.

.. because it is not a CMS disk file, data in the SPOOL (so reader, print and punch files) can have more records¡­.

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Dave

(oh and whilst its not in VM/370 there is also NETDATA format¡­.)

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From: [email protected] <[email protected]> On Behalf Of Drew Derbyshire
Sent: 02 January 2020 19:20
To: [email protected]
Subject: Re: [h390-vm] IND$FILE Binary of Module

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On 1/2/20 10:28 AM, Dave Wade wrote:

Its on the six pack...
.. and I can't see why we need yet another pack program. ...
There are utilities in the files section to read and write CMS TAPE files,
and DISK DUMP files both of which are native VM archive formats, on
windows/linux

Not to start a debate, but I can see why.? :-)

  • It's not trivial to mount a AWS tape on any system that you don't control the host
  • When you do control the host, it requires accessing not just your VM systems but two Hercules consoles.
  • VMARC data fits through card readers, and by extension host utilities that use TCP/IP to exploit the card reader, like vmsubmit.py in . (It's a pity Hercules card punches can't connect to pipes like printers can. I find this an odd omission.)
  • Issues that apply in special cases (i.e. the LCM+L 4361, which of course I'm rather fond of):
    • It's not trivial to mount a AWS tape on real hardware
    • DISK (DUMP/LOAD) is not entirely compatible between VM/370 R6 and VM/SP 5
  • IBM likes it.
    • It seems it's their preferred format for sharing free VM software over the ASCII friendly Internet.?
      (Pity that most the software itself is for XA and newer!)
    • It too has host utilities to read the format
      (Pity the MacOS version, being 32-bit, is broken on Catalina)

This is not to say the other toys should be tossed (except may the Windows specific one which requires shutting down VM and running a host script!), but it is useful.

-ahd-

p.s. I consider VMARC's command line syntax horrible, but I have to yet to decide what it should be (and if so, what wrapper script to write for it.)

-- 
Drew Derbyshire
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 Alcohol, Tobacco, Firearms. Anyone remember the chips?
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