On Mon, 2 Jul 2007 15:36:02 +0200, R.S. <[EMAIL PROTECTED]> wrote: >Mark Zelden wrote: >> On Mon, 2 Jul 2007 12:02:53 +0200, R.S. <[EMAIL PROTECTED]> wrote: >> >>> 2. Drive mode, and then "internal" data format incompatibilities. Indeed, >> the following can happen: a drive in mode A cannot read tape written by the >> drive in mode B. >> >> Not sure what you are getting at here. He did say both sides were 9840C. >> Even if the other side was 9840A or 9840B (which are the same format), >> 9840C can read both. Also, a 9840 in 3590 mode can read data originally >> written from a 9840 in 3490 mode.
>I can be wrong, but I vaguely recollect some incompatibility in 'tape format' >between emulation modes. That's way I wrote 'can happen'. Perhaps at some microcode levels of the drive(s). >BTW: What about 'native' aka Fibre Channel mode of 9840C ? Is the format >compatible as well ? > The channel is just an interface. That shouldn't change the tape format. Think: If I changed my 9840C from ESCON to FICON, is all my data lost? Answer: Of course not. Mark -- Mark Zelden Sr. Software and Systems Architect - z/OS Team Lead Zurich North America / Farmers Insurance Group: G-ITO mailto:[EMAIL PROTECTED] z/OS and OS390 expert at http://searchDataCenter.com/ateExperts/ Systems Programming expert at http://expertanswercenter.techtarget.com/ Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
