Path: utzoo!attcan!utgpu!watmath!iuvax!rutgers!aramis.rutgers.edu!topaz.rutgers.edu!kaldis From: kaldis@topaz.rutgers.edu (Theodore A. Kaldis) Newsgroups: comp.sys.ibm.pc Subject: Re: Installing second disk on True Blue Message-ID:Date: 15 Aug 89 12:31:19 GMT References: <4352@portia.Stanford.EDU> <216100121@trsvax> Organization: Rutgers Univ., New Brunswick, N.J. Lines: 28 In article <216100121@trsvax> slimer@trsvax.UUCP writes: > I used to do this alot... let's see... I believe the problems could be > the fact that a TYPE 2 does not represent a 20MEG drive. The drive TYPEs > represent the number of cylinders and heads on the physical drive. > What you would need is a list of the TYPEs by cylinder and head numbers, > then compare your new drive to these TYPEs to find the correct match. > Of Course...this is only one item that could be the problem. I know that > in some machines I have worked on... a IBM OLD 20MEG is a TYPE 2 while > some newer 20MEGs by third parties are TYPE 4. Are you certain about this? I was under the impression that all clones use the same numbers to designate drives. Type 2 is a 615 cyl., 4 head, 17 sect. drive with 300 precomp. (the setting used for for Seagate 225's). Type *6* is also a 20 meg with the same specs, except no precomp. (Type 4 is a 65 Meg drive.) There are also a several other 20 Meg configurations (types 9?, 16?), one with 820 cyls. and 3 heads, and one with 612 heads instead of 615. If anyone is interested, I can post a list of about 40 of these, with their corresponding type #'s. -- Theodore A. Kaldis | "Perhaps we may +-+-+-+-+-+-+-+-+- | frighten away email: kaldis@topaz.rutgers.edu | the ghost of so UUCP: {...}!rutgers!topaz.rutgers.edu!kaldis | many years ago U.S. Snail: P.O. Box #1212, Woodbridge, NJ 07095 | with a little ex-Ma Bell: (201) 283-4855 (voice) | illumination . . ."