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 -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: HSM, 3490s and a VTL
Check out the TAPEUTILIZATION command option in HSM. You can use the CAPACITYMODE option or depending on how back-level your HSM is you can set percentfull to +100%. I didn't think that CAPACITYMODE would work for anything other than 3590 emulating 3490. I know that it didn't do too good with STK 9480's gen'd as 3490's. Jack Kelly 202-502-2390 (Office) -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: HSM, 3490s and a VTL
In the TAPEUTILIZATION operand of the SETSYS command, you can specify more than 100% (apparently designed for situations just like this). -Original Message- From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of Adams, Tracy Sent: Wednesday, January 13, 2010 1:00 PM To: IBM-MAIN@bama.ua.edu 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. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: HSM, 3490s and a VTL
Check out the TAPEUTILIZATION command option in HSM. You can use the CAPACITYMODE option or depending on how back-level your HSM is you can set percentfull to +100%. We used to use 1090 for our pseudo 3490's. Dennis -Original Message- From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of Adams, Tracy Sent: Wednesday, January 13, 2010 3:00 PM To: IBM-MAIN@bama.ua.edu 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 -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: HSM, 3490s and a VTL
> -Original Message- > From: IBM Mainframe Discussion List > [mailto:ibm-m...@bama.ua.edu] On Behalf Of Adams, Tracy > Sent: Wednesday, January 13, 2010 3:00 PM > To: IBM-MAIN@bama.ua.edu > 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 john.mck...@healthmarkets.com * 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 lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
