Spare LPAR? Surely you jest. What with z/TPF and Linux, every spare byte of memory is allocated.
Some times, when MVS isn't chewing up a lot of bandwidth, we get as fast or faster response from the remote site. I presume that is because the SL3000 buffers data and gives immediate responses. When the network has spare time, the tapes can be driven at nearly their capacity. Like I told Dennis, I do not think that attaching the drive to a virtual machine will give useful results. CP manages the I/O and the IPL sequence is emulated. The only real test will be to IPL in an LPAR. That will involve the HMC and a real IPL sequence, which are the really big question marks. Regards, Richard Schuh > -----Original Message----- > From: The IBM z/VM Operating System > [mailto:ib...@listserv.uark.edu] On Behalf Of David Boyes > Sent: Wednesday, May 06, 2009 3:03 PM > To: IBMVM@LISTSERV.UARK.EDU > Subject: Re: Remote Drives > > On 5/6/09 12:17 PM, "Schuh, Richard" <rsc...@visa.com> wrote: > > > Really remote - about 2000 miles away. > > Yeah, that would definitely qualify as remote. I think it > would be a timing problem mostly -- can the device deliver > data in the expected time frame for IPL to look valid -- but > I suspect there's going to be no real reliable answer across > the board. If you can attach a device to a spare LPAR or a > virtual machine and try it, I think that's your only way to > get a real answer. >
