Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!utgpu!water!watmath!uunet!ukma!cbosgd!ihnp4!ihlpl!ihtnt!ihtlt!ihop3!looney!cmv From: cmv@looney.UUCP Newsgroups: unix-pc.general Subject: Miniscribe Drives for the unix-pc Message-ID: <1100025@looney> Date: Tue, 24-Nov-87 15:29:00 EST Article-I.D.: looney.1100025 Posted: Tue Nov 24 15:29:00 1987 Date-Received: Sun, 29-Nov-87 19:58:30 EST Lines: 37 Nf-ID: #N:looney:1100025:000:1653 Nf-From: looney!cmv Nov 24 14:29:00 1987 I just got a bunch of spec sheets from Miniscribe that talk about their line of ST-412/506 5 1/4" Winchester Hard disk drives (there's a good trivia question, why is it called the ST412/506 standard?? I've no idea!) and thought some folks would be interested in the results, so here they are! Miniscribe Model Height Size (fmtted) Ave Seek Heads: Recording formatted time Cylinders Method ========================================================================= 3212+ Half 12.75MBytes 53msec 2:615 MFM 3425+ Half 21.40MBytes 53msec 4:615 MFM 3438+ Half 32.70MBytes 53msec 4:615 2,7RLL 3650 Half 42.25MBytes 61msec 6:809 MFM 6032 Full 26.70MBytes 28msec 3:1024 MFM 6053 Full 44.60MBytes 28msec 5:1024 MFM 6079 Full 68.80MBytes 28msec 5:1024 2,7RLL 6085 Full 71.30Mbytes 28msec 8:1024 MFM 6128 Full 110.1Mbytes 28msec 8:1024 2,7RLL Now, a few questions to any guru's out there in general. As I understand things (which isn't saying much) the Modified Frequency Modulated (MFM) encoding that is used for recording the information on the disk, is being replaced by the 2,7 Run Length Limited (RLL) coding to boost the capacity of the hard disk (I got this information from EDN magazine p57 September 3, 1987). My question is what does this mean to us unix-pc folks? Can I go out and buy a Miniscribe 3438+ and simply install it in my stock 7300 and it will work? If not, can I get it to work by simply exchanging the WD1010 chip with a WD2010 chip, or is there more to it than that? I really don't understand the impact of this 2,7RLL enough to know what to do, any help is much appreciated. Craig Votava [ihnp4!]looney!cmv chip