There can be two different capacities depending on what you are looking for.
One is the 3494/ATL back end for a VTS. These tapes are generally permanently resident in the ATL. You can get an estimate of volume usage through the Library Manager. The second would be for a 'classic' ATL where tapes may be inserted/ejected as needed. Total capacity is dependent upon the number of tapes you have. The number of tapes in the ATL at any one time would just be for what is available for immediate use. Your best bet would be to get reports from your tape management system giving BLKSIZE and BLKCNT per dataset and calculate total GB/TB from there. Don't forget scratch files as they still take space on a real volume or VTS back end (unless you have release upon scratch set). If you are planning on changing tape technology to higher density media the calculation for the VTS back end should be fairly straight forward. GB/TB needed divided by 3 (average compression of 3:1 YMMV) divided by tape capacity then add a bit for spare and non-full tapes. Classic ATL removable volumes could be closer to a 1:1 conversion unless a majority of your files are multivolume. CIT | Ken Porowski | VP Mainframe Engineering | Information Technology | +1 973 740 5459 (tel) | [email protected] This email message and any accompanying materials may contain proprietary, privileged and confidential information of CIT Group Inc. or its subsidiaries or affiliates (collectively, "CIT"), and are intended solely for the recipient(s) named above. If you are not the intended recipient of this communication, any use, disclosure, printing, copying or distribution, or reliance on the contents, of this communication is strictly prohibited. CIT disclaims any liability for the review, retransmission, dissemination or other use of, or the taking of any action in reliance upon, this communication by persons other than the intended recipient(s). If you have received this communication in error, please reply to the sender advising of the error in transmission, and immediately delete and destroy the communication and any accompanying materials. To the extent permitted by applicable law, CIT and others may inspect, review, monitor, analyze, copy, record and retain any communications sent from or received at this email address. -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Jonathan Goossen Sent: Monday, April 15, 2013 3:10 PM To: [email protected] Subject: Re: [IBM-MAIN] Fwd: 3494 Utilization We use to have a 3494. I vaguely remember a web page for it that displayed used versus capacity for the last 30 days. But you would need the website enabled and setup for this to work. For each iteration someone else set it up and gave me the IP address for it. Thank you and have a Terrific day! Jonathan Goossen, DTM ACT Mainframe Storage Group Personal: 651-361-4541 Department Support Line: 651-361-5555 For help with verbal communication and leadership skills checkout Woodwinds Toastmasters. IBM Mainframe Discussion List <[email protected]> wrote on 04/15/2013 09:43:19 AM: > From: Lizette Koehler <[email protected]> > To: [email protected] > Date: 04/15/2013 09:43 AM > Subject: Re: Fwd: 3494 Utilization > Sent by: IBM Mainframe Discussion List <[email protected]> > > Saurabh, > > I believe that the PC attached to the 3494 (if you have a TCPIP link you can > use that) to see about the storage on the device. > > Then you could determine how many tapes you have placed in use vs. the > number of tapes actually used. > > Your CE can assist with that > > Lizette > > > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[email protected]] On > Behalf Of saurabh khandelwal > Sent: Monday, April 15, 2013 7:11 AM > To: [email protected] > Subject: Re: Fwd: 3494 Utilization > > Hello, > Thanks for reply . I am referring to the data size consumed by > 3494 ATL. Can you please provide light on DFSMS utility, which can help in > calculating data size. > > Regards > Saurabh > > > On Mon, Apr 15, 2013 at 6:00 PM, R.S. <[email protected]>wrote: > > > W dniu 2013-04-15 14:23, saurabh khandelwal pisze: > > > > Hello Group, > >> > >> We are using IBM 3494 ATL currently for backup purpose along with > DFHSM. > >> > >> Now we have requirement to move our all data from 3494 into new Tape > >> library. But my issue is to find the current utilization of 3494 ATL. > >> > >> Is there any way to find, how much space is being used by our data in > >> 3494 ATL, so that I can calculate the current size and plan for new > >> Tape library. > >> > >> > >> > > What do you mean by utilization? > > How much space? Physical dimensions? > > The simplest method is to go to the server room with tape measure or > > zigzag rule. > > If you cannot visit your server room then ...you are not proper person > > to do the planning! I mean it. > > > > Yes, you can check the configuration of your 3494 (how many cabinets, > > what > > type) using web interface and maybe DFSSMS facilities. Yes, you can > > further check the dimensions in the documentation, but you should also > > check other things specific to your server room, like pillars, other > equipment, etc. > > > > > > -- > > Radoslaw Skorupka > > Lodz, Poland > > > > > > > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN This e-mail message and all attachments transmitted with it may contain legally privileged and/or confidential information intended solely for the use of the addressee(s). 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