Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!samsung!uunet!van-bc!rsoft!mindlink!a186
From: a186@mindlink.UUCP (Harvey Taylor)
Newsgroups: comp.periphs
Subject: Hard Drive questions: WPC & RWC
Message-ID: <762@mindlink.UUCP>
Date: 5 Dec 89 18:49:28 GMT
Organization: MIND LINK! - British Columbia, Canada
Lines: 30


  In every file of harddrive specs I have ever seen there has been an
 entry for Reduced Write Current and Write Pre-Compensation. I was jawing
 with a bud tonight & I realized, I didn't have a clue what they were!
  Usually the entry will looks something like this:
 |
 | Abbreviations:  HDS - Heads
 |                 CYL - Cylinders (Tracks)
 |                 RWC - Reduced Current Write Compensation
 |                         (0 indicates RWC on all the time)
 |                 WP  - Write Pre-Compensation
 |                         (Usually 0 or number of CYL's)
 |
 | +--------+------------+-------+-------+-------+------+--------------+
 | : ATASI  :   MODEL    :  HDS  :  CYL  :  RWC  :  WPC :      NOTES   :
 | +--------+------------+-------+-------+-------+------+--------------+
 |          :   AT3020   :   3   :  635  :   0   :  0   :              :
 |          +------------+-------+-------+-------+------+              :
 |
  Do you know what RWC & WPC are?
  <-Harvey

  PS.
    Any pointers to literature would be appreciated. Who has written a good
  book on the nitty gritty of hard drives?

      "Am I revolting yet?" Zippy Pinhead
      Harvey Taylor      Meta Media Productions
       uunet!van-bc!rsoft!mindlink!Harvey_Taylor
               a186@mindlink.UUCP