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- Path: cup.portal.com!drBob
- From: drBob@cup.portal.com (Robert A Rethemeyer)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: TAR, BTNtape and HP35470A DAT Drive
- Date: 16 Mar 1996 11:40:03 -0800
- Organization: The Portal System (TM)
- Sender: pccop@unix.portal.com
- Message-ID: <151027@cup.portal.com>
- References: <3145B779.58B7@bart.nl> <4i5vcj$9sj@PEAK.ORG>
- NNTP-Posting-Host: news1.unix.portal.com
-
- ridgwad@PEAK.ORG (Dean Ridgway) writes...
-
- >Increase your number of blocks (NB parameter) and your performance should
- >increase (to a point).
-
- That's basically what I told Mr. Hanssen in an email response to him.
- The docs I found say that the HP drive in question has a 1 MB internal
- buffer, so I recommended making the BTN buffers the same size.
- With 512-byte blocks, that would correspond to NB-2048. Hopefully
- that will get BTN's and the drive's buffering actions "in sync",
- but I've never experimented to see how well this works.
-
- >A drawback is the more blocks you specify, the more tape is wasted at the
- >end of an archive (since its padding with blank blocks)
-
- Actually, I fixed that "feature" in BTN version 3.0. It only writes the
- number of blocks necessary, so the most you would waste is blocksize-1
- bytes (511).
-
- > /\-/\ Dean Ridgway | Two roads diverged in a wood, and I-
- > ( - - ) InterNet ridgwad@peak.org | I took the one less traveled by,
- > =\_v_/= FidoNet 1:357/1.103 | And that has made all the difference.
- CIS 73225,512 | "The Road Not Taken" - Robert Frost.
- >http://www.peak.org/~ridgwad/
- >PGP mail encouraged, finger for key: 28C577F3 2A5655AFD792B0FB 9BA31E6AB468312
- 6
-
- ---Bob Rethemeyer (drbob@cup.portal.com)
-