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- Path: sparky!uunet!paladin.american.edu!auvm!STANFORD.BITNET!RONM
- Message-ID: <IBM-MAIN%92090812422982@RICEVM1.RICE.EDU>
- Newsgroups: bit.listserv.ibm-main
- Date: Tue, 8 Sep 1992 10:40:23 PDT
- Sender: IBM Mainframe Discussion list <IBM-MAIN@RICEVM1.BITNET>
- From: Ron Meyer <RONM@STANFORD.BITNET>
- Subject: Re: PROC TAPELABEL and 3490E drives
- Lines: 26
-
- REPLY TO 09/08/92 01:03 FROM IBM-MAIN@RICEVM1.BITNET "IBM Mainframe Discussion
- list": Re: PROC TAPELABEL and 3490E drives
-
- I don't know if IDRC (Improved Data Recording (what does the C stand
- for?)) is a new version so much as a later add-on feature for 3480s.
- >Improved Data Recording Capability.
-
- Well, the 3490E _does_ write 18 tracks in each direction. This means
- that if you're filling a series of cartridges, the rewind time is
- zero! I had heard somewhere that there would be double length
- cartridges available. Can someone with 3490Es confirm this?
- >There are indeed double length cartridges available. We've placed
- >an order for several thousand of them.
-
- So am I. Now, if you figure an "average" compression ration of 3.5:1,
- one of those suckers should just about hold a full dump of a 3390-3.
- IBM was getting concerned about how many volumes were required to dump
- their largest disks. It looks like the 3490E addresses that problem.
- >Theory has it that the 3490E with the double length tape will
- >indeed hold a complete 3390-3 dump. We'll let you know around
- >mid-October if it's true. (Drives and double length tapes both to
- >be available here).
-
- Ron
-
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