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- Path: sparky!uunet!dtix!darwin.sura.net!jvnc.net!nuscc!ntuix!ntuvax.ntu.ac.sg!astsloke
- From: astsloke@ntuvax.ntu.ac.sg
- Newsgroups: comp.sys.ibm.pc.hardware
- Subject: Re: Harddisk parameters: What is WPCom?
- Message-ID: <1992Sep13.005358.1@ntuvax.ntu.ac.sg>
- Date: 12 Sep 92 16:53:58 GMT
- References: <BuGMIv.738@cs.vu.nl>
- Sender: news@ntuix.ntu.ac.sg (USENET News System)
- Distribution: world,inet
- Organization: Nanyang Technological University - Singapore
- Lines: 34
- Nntp-Posting-Host: v8802.ntu.ac.sg
-
- In article <BuGMIv.738@cs.vu.nl>, xerox@cs.vu.nl (J. A. Durieux) writes:
- > I have two harddisks:
- >
- > (1) 81 MB 980,10,17 Caviar
- > (2) 203 MB 1024,15,27 Seagate
- >
- > Besides these numbers, my Setup program asks me to give a Parking zone
- > (I give 980 and 1024) and a "WPCom". What does that mean, and what number
- > should I put there?
-
- WPcomp refers to Write Precompensation. It is only necessary on some older
- drives. The following is an excerpt from the documentation of the the
- SGAFMT1.ZIP package distributed by Seagate Technologies Inc. I downloaded this
- from their BBS.
-
- "PRECOMPENSATION
- Applied to write data by the controller in order to partially
- alleviate bit shift which causes adjacent 1's written on magnetic
- media physically to move apart. When adjacent 1's are sensed by the
- controller, precompensation is used to write them closer together on
- the disc, thus fighting the repelling effect caused by the recording.
- Precompensation is only required on some oxide media drives."
-
- I believe that you can enter a 0 or -1 in this entry in your CMOS setup. The
- landing zone you specify is irrelevant as drives now have auto parking which is
- activated on powering down the drive. The landing zone is "fixed" by design.
-
-
- Regards.
-
- T.S. Loke
- Nanyang Technological University
- Singapore
- * Standard Disclaimers Apply
-