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Article #15Exabyte data capacity
From: Robert Belshe
Date: Wed, 04 Nov 1992 06:06
Date: Wed, 04 Nov 1992 06:06
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1164 bytes
Has anyone noticed a loss of data capacity when writing model 8500 exabytes at the optional low density? We have noticed that when we write a full tape from an application which writes 8kbyte records at a data rate of around 50kbytes/second that the tape fills up at approx 1 gbyte, instead of the expected 2 gbytes. A test program which writes data at 250kbytes/sec is able to get a full 2 gbytes on a tape. My guess is that this is caused by the tape being unable to stay in the streaming mode. The drive is a TTI model 8510, running on a uVax 3100 thru a TD-systems Viking SCSI controller. The folks at TTI say they never heard of this problem. Any comments or suggestions will be appreciated. -- Bob Belshe
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Path: arc1-ca.pugleaf.net!sparky!uunet!cis.ohio-state.edu!zaphod.mps.ohio-state.edu!sol.ctr.columbia.edu!spool.mu.edu!agate!dog.ee.lbl.gov!rab From: rab@bevsun.bev.lbl.gov (Robert Belshe) Newsgroups: comp.periphs Subject: Exabyte data capacity Date: 4 Nov 1992 06:06:56 GMT Organization: Lawrence Berkeley Laboratory, California Lines: 24 Distribution: world Message-ID: <27204@dog.ee.lbl.gov> NNTP-Posting-Host: 128.3.112.94