Path: utzoo!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!ames!pasteur!ucbvax!RICHTER.MIT.EDU!krowitz From: krowitz@RICHTER.MIT.EDU (David Krowitz) Newsgroups: comp.sys.apollo Subject: Re: 8mm backup. Time required to back up 2.3 gb Message-ID: <8812091434.AA04668@richter.mit.edu> Date: 9 Dec 88 14:34:45 GMT Sender: daemon@ucbvax.BERKELEY.EDU Organization: The Internet Lines: 16 We're finding that our 6250 BPI Kennedy 9400 (45 inches/sec) will backup about 150 MB/hour. The drive is attached to a 1.5MB DSP80. We are evaluating one of the Workstation Solutions' drives attached to a 4MB DN3000, and it seems to be running about 120 MB/hour. These figures are for doing full backups with WBAK. While the Kennedy 9400 can write 1600 BPI tapes at 75 inches/sec, the number of tapes needed to back up 2.3 GB would be prohibitive -- almost 60 tapes. -- David Krowitz krowitz@richter.mit.edu (18.83.0.109) krowitz%richter@eddie.mit.edu krowitz%richter@athena.mit.edu krowitz%richter.mit.edu@mitvma.bitnet (in order of decreasing preference)