On Mon, 23 Oct 2006 12:01:55 -0500, Jerry Ragland <[EMAIL PROTECTED]> wrote:
<snip> >One more short update is that, My thinkpad has 2 mainframe instances one >z/OS 1.6 and z/Os 1.4 both are connected to the same tape drive. In z/OS 1.6 >everthing is perfect when I execute the same JCL and I can able to access >the tape with out any problems. > >I get the problem only when I use with the other instance i.e. z/OS 1.4 > <snip> Tape drive control units are not shareable between instances in FLEX-ES, unlike DASD control units which can be shared. Each of your two instances has its own unique tape drive control unit defined to it. So even though each instance may have tape drives defined at (for example) address 580-58f, those are different tape drives unique to each of the two instances. Your scsi tape drive can be mounted (associated) with a single emulated tape drive at a time. So if it is currently mounted on one instance's drive, if you wish to use on a second instance's drive, you must first issue a CLI "mount xxx OFFLINE" command for the first instance (where xxx is the address on that instance where the scsi tape drive is mounted). After that, you use the CLI on the second instance to "mount yyy /dev/st0" (where yyy is the emulated tape drive address on the second instance, and /dev/st0 is the correct Linux tape device identifier for the scsi tape drive). You also should be familiar with the CLI command "display devstate xxx" or "d devstate xxx" where xxx is the device address you are interested in. The display will show what device or file is currently associated with a device as will as its other status characteristics. "OFFLINE" (as in the mount command in the previous paragraph) is a special case meaning "nothing" and should not be confused with the concept of "offline" from z/OS's perspective. As John McKown suggested, join us over on the FLEX-ES discussion list if you care to. I only get IBM-MAIN in digest mode every midnight. -- Gary Eheman Fundamental Software, Inc. http://www.funsoft.com ---------------------------------------------------------------------- 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
