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Conference hydra::amiga_v1

Title:	AMIGA NOTES
Notice:	Join us in the NEW conference - HYDRA::AMIGA_V2
Moderator:	HYDRA::MOORE

Created:	Sat Apr 26 1986
Last Modified:	Wed Feb 05 1992
Last Successful Update:	Fri Jun 06 1997
Number of topics:	5378
Total number of notes:	38326

3949.0. "What is ST-412" by WELSWS::FINNIS () Tue Jul 24 1990 19:33

    If a pointer to a previous note is all that is required please post.
    
    Is ST-412 an Interface protocol like ST-506 or SCSI or what ?
    
    Going through previous notes `dir/key=hard_drive' did not seem to give
    the required info. But I'm sure I've seen something like this before.
    
    Seagate seem to have also named a drive ST-412 or is this a
    mis-conception.
    
    This is in reference to an ST-11R controller
    because the manual that came with the controller refers to it as
    follows.
    
    ST-11R and ST-11M are standard ST-412 interface controllers ?
    I thought they were ST-506 !
    
    
    			- Pete -

T.R	Title	User	Personal Name	Date	Lines
3949.1	Drive + interface Spec	CSC32::A_ANDERSON	DTN 592-4170 NSU/VAX	`Tue Jul 24 1990 20:04`	12
	ST-506 is a standard defined by Seagate, also it is a drive we called it the RD50. The ST-412 is also refered to and is also a drive by Seagate we called it the RD51. I do not know if this is an Industrial standard defined as ST-506/ST-412 but it is widely used and for the most part a controller that is ST-506/St-412 compatable should have no trouble with a drive that is ST-506/ST-412 compliant. I have always assumed a ST-506 compliant drive is the same as a ST-412 compliant drive from an interface standpoint. Alan
3949.2	Ok	WELSWS::FINNIS		`Wed Jul 25 1990 22:25`	4
	Thanks for the input Alan - Pete -
3949.3	Now my Seagate docs make sense!	SNOC02::KING	Randall King @SNO SNOC02::KING from Aussieland.	`Sat Sep 15 1990 05:15`	10
	Many thanks - this has bugged me for ages. I have a SEAGATE drives spec catalogue that has all the ST412 interface drives, but I had no idea how they related to the ST-506 we hear about everywhere. BTW, if anyone needs the basic specs - MB, Avge access time, MTBF only for any of these Seagate ST drives, just drop me an EM.
3949.4	And Controllers ?	WELSWS::FINNIS		`Sun Sep 16 1990 19:03`	5
	What about controllers.. I didn't get much tech info with my ST11-R - Pete -
3949.5	some added info	KAOA01::PACEY		`Fri Dec 07 1990 14:06`	6
	the ST- designates the interface/bus specifications used. just as RS232, SCSI, etc are 'hookup' bus designators. the 506/412 designate unformatted capacity of the unit. How it's formatted will change its capacity, ie # of sectors, size of sectors. St-506 is 5 meg, St-412 is 10 meg or thereabouts on the Amiga. depends on how many bad spots you have to declare as well.