Oh No.  John said FlexES!!!!.  Please lets not get started on lawsuits 
again!!!    hahahahahahahahaha...



"McKown, John" <[EMAIL PROTECTED]> 
Sent by: IBM Mainframe Discussion List <[email protected]>
12/29/2006 01:54 PM
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Re: Remote Tape drives






> -----Original Message-----
> From: IBM Mainframe Discussion List 
> [mailto:[EMAIL PROTECTED] On Behalf Of Crispin Hugo
> Sent: Friday, December 29, 2006 12:27 PM
> To: [email protected]
> Subject: Re: Remote Tape drives
> 
> 
> Cheers John,
> I thought channel extenders had a finite distance , like 
> about 250k. I think
> we are looking for something which would be IP based
> 
> 
> Crispin Hugo
> Systems Programmer, Macro 4

Hum, I think that you are correct. But that is all that I have heard of.
The problem, as best as I can see it, is the slowness of the response
from the tape due to the extreme slowness of the speed of light. <gring>

Now, I know of a possible way to do it, but it would be VERY indirect
and not "real time". Funsoft (http://www.funsoft.com), the makers of
FlexES, have a system called the FLEXCUB. This is based on FlexES, sort
of. What it does is make an Escon connected control unit. On the "back
end" it can use the device emulation software from FlexES to control
SCSI tape drives, emulated tape drives (AWS or FakeTape(tm) formatted
volumes which "look like" tapes to the z/OS system) and disk volumes.
What would be possible, but a real PAIN, would be to connect such a
thing to your zSeries locally. Have the z/OS (or z/VSE or z/VM or
z/Linux) write their data to an FakeTape(tm) volume which is on the
local FlexCUB system. Have this FlexCUB system, which runs Linux, export
the filesystem containing the FakeTape(tm) volumes using NFS or some
other such software. Now, on the far end, have another PC running Linux
with a SCSI attached tape drive import that filesystem. You'd likely
need to VPN the two systems together over the Internet or a dedicated IP
line (your choice). On the remote PC, have a daemon (or cron scheduled
task) which can copy the FakeTape(tm) to an actual physical tape. There
is a utility to do this from Funsoft. This would assume that the
FakeTape(tm) on the FLEXCUB system would always be considered the
authoritative source for the data on the particular volume.



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