ESDI Cabling

From: Marty <Marty_at_itgonline.com>
Date: Thu Oct 1 12:02:00 1998

 ESDI cabling is definitely the ST506/412 interface used on old MFM
 (e.g. Seagate ST-225) or RLL (e.g. Seagate ST-238). If the 34-pin
 control cable is straight through (without the twist) select drive 0
 if the selection is 0 and 1. If the selection is drive 1 and 2, select
 drive 1 (nomenclature varies among manufacturers). Ensure the
 terminating resistors are installed or you are asking for trouble.
 
 If the 34-pin control cable has a twist and you have only one drive
 attached to the end of the cable with the twist, use drive select 1 if
 your drive nomenclature is 0 and 1. If the drive select nomenclature
 is 1 and 2, select drive 2 and make certain you have the terminating
 resistors installed.
 
 Two drive scenario:
 
 34-pin control cable with twist, drive at end of cable with twist use
 drive select 1 if drive has 0 and 1 as drive selects or 2 if using 1
 and 2 drive selects and again ensure the terminating resistors are
 installed in this drive. The drive in the middle of chain should use
 drive select 1 if drive has 0 and 1 as drive selects or 2 if using 1
 and 2 drive selects (yes, use the same drive select as the C: drive
 attached to the end of the cable) and make certain the terminating
 resistors are removed from this drive which will be seen as D: drive.
 
 If the 34-pin cable has no twist, C: drive is set for 0 (if drive
 selects are 0 and 1) or 1 (if drive selects are 1 and 2) and
 connected at the end of the cable with the terminating resistors
 installed; D: drive is set for 1 (if using drive selects 0 and 1) or 2
 (if using drive select 1 and 2), connected in the middle of the chain
 and must have the terminating resistors removed.
 
 Marty
 
 
 
  
Received on Thu Oct 01 1998 - 12:02:00 BST