There will be little need for [E]CKD emulation once z/OS groks SCSI. -- R;
On Wed, 5 Oct 2005, David Boyes wrote: > Darn, hit send too soon. > > > Do you suggest to use an > > iSCSI tape device attached to Linux to do backup of z/VM or z/OS data? > > No, I want emulated 3420 or 3480/3490 directly on SCSI for that. You've done > it in the P/390 and MP2k/3k, and given the generic SCSI kernel in the later > VM revs, this shouldn't be rocket science at all to adapt the device driver > engines in AWS3480 and AWS3420 to the generic SCSI kernel. 3420 would be > better for the large capacity tapes, as it's model of "write until I get a > EOT marker" is a better fit for a 300G AIT tape. > > > As far as I know, z/OS doesn't support SCSI at all. > > Another reason for implementing the above emulated tape, and adding ECKD > emulation over SCSI in VM (which you've also done in the P/390... See > above). AWSECKD should have all the code you need to add ECKD emulation to a > generic SCSI implementation for 3380 and 3390 devices. > > If those two things were available, then z/OS could remain fat, dumb and > happy and work fine in a all-SCSI environment with relatively small amounts > of work. z/VM would "just work" (as always) and VSE could just go along for > the ride...8-) > > -- db > > ---------------------------------------------------------------------- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
