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- Path: sparky!uunet!ogicse!das-news.harvard.edu!speed!chen
- From: chen@speed.uucp (Lilei Chen)
- Newsgroups: comp.os.vms
- Subject: Re: Problems with EXABYTE tape drive
- Message-ID: <1993Jan25.151141.23796@das.harvard.edu>
- Date: 25 Jan 93 15:11:41 GMT
- Article-I.D.: das.1993Jan25.151141.23796
- References: <1993Jan22.200938.22220@das.harvard.edu> <1jq49uINNhrv@gap.caltech.edu>
- Sender: usenet@das.harvard.edu (Network News)
- Organization: Aiken Computation Lab, Harvard University
- Lines: 19
-
- Carl J Lydick writes:
- >Well, unless I'm mistaken, the 2GB figure applies only if you:
- > 1) Write large records; and
- > 2) Keep the tape streaming
- >If you're either:
- > 1) Writing small records; or
- > 2) Running an application that writes a record, pauses for awhile,
- > writes the next record, etc.
- >then you're not going to be able to write the full capacity of the tape.
-
- I have found out since my original posting, that the problem lies probably
- in the firmware responsible for the motion control. AFter 1/4 of the tape,
- it decides that the logical end of tape is reached, thus the 500MB (2GB/4)
- figure in my original post. So either the firmware or the sensor for detecting
- the real tape length is bogus. Since all five units exhibt the same behavior,
- it is very likely that the firmware in our units is not working properly.
- That is the conclusion I have reached so far.
-
- Jim (xue@cfaft5.harvard.edu)
-