> -----Original Message----- > From: IBM Mainframe Discussion List > [mailto:[email protected]] On Behalf Of Adams, Tracy > Sent: Wednesday, January 13, 2010 3:00 PM > To: [email protected] > Subject: HSM, 3490s and a VTL > > I would like to confirm my thoughts here... > > We just installed this cool device to allow Z/OS talk to a "open > systems" VTL. They wanted me to gen device types of tape that we knew > would never be used any where else so it was recommended by the VTL > vendor that we use 3490. I did that on the Z/OS side. On > the VTL side > they are 3490 devices but using 10 GB tape sizes (similar to the 3590J > tapes we currently use). For DFDSS jobs this works fine... unit=3490 > and I can put 20 GB compressed on a single tape. Now HSM > gets switched > over to migrate to the 3490 devices. He starts writing to a tape and > bingo, at 300mb he marks the tape full and requests another scratch > tape. On the VTL side it is only 3% used but no big deal, it is only > virtual. So my question is does HSM simply keep track of data written > so it can manage how full it believes the tape is and since 3490 tapes > are old (very old) their capacity was 300 mb so that is all it will > right? > > If this is the case, I see my two options as A. x30 my number of tapes > in the VTL or B. change the device type to something HSM thinks will > hold more data. > > Thoughts? > > TIA
The third choice is to stay 3490, but tell HSM the actual size of the tape. SETSYS TAPEUTILIZATION(UNITTYPE(3490) PERCENTFULL(1000)) Would tell HSM to assume the 3490 tape is 10x normal size or about 8,000 Mb (~8 GiB). The PERCENTFULL can be > 100! ref: http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/DGT2I471/1.10.5.6 -- John McKown Systems Engineer IV IT Administrative Services Group HealthMarkets(r) 9151 Boulevard 26 * N. Richland Hills * TX 76010 (817) 255-3225 phone * (817)-961-6183 cell [email protected] * www.HealthMarkets.com Confidentiality Notice: This e-mail message may contain confidential or proprietary information. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. HealthMarkets(r) is the brand name for products underwritten and issued by the insurance subsidiaries of HealthMarkets, Inc. -The Chesapeake Life Insurance Company(r), Mid-West National Life Insurance Company of TennesseeSM and The MEGA Life and Health Insurance Company.SM ---------------------------------------------------------------------- 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
