Article 50462 of comp.sys.dec:
salient (salient@cistron.nl) wrote:

: Hello all,

: Can somebody tell me where I can get detailed information about the
: jumpersettings for a 1.05GB DEC rz26 harddisk ??

Here's something I got off the net a while back. For my own use I've deleted
the headers, so I'm 'stealing' someone else's work here.





    +------------------------XXX+
    X<-----Pin 1            /   |
    X J6                   /    x
    X                     J5    xSCSI Connector
    |                           x
    |                           x
    |                  J2       |
    +----------------xxxxx------+                   +-------Pin 1
                       ^                            |
                       |                            v
                       +------------- . . . . . . . .
                                      . . . . . . . .
                                      R D M W P T T T
                                      E S E P E E P P
                                      S
                                        ^ ^
                                        /  \
                       Delayed Spin-up-+    +---Enable Motor Start
    DS  ME
    Off Off     Spindle starts immediately after power up (Default Setting)
    Off On      Spindle doesn't start till after Host "Start Unit" command
    On  Off     Spindle start delayed by SCSI ID Times 12 secs after Powerup
    On  On      Drive spindle starts when Start Unit command received from
                Host.....delayed start is overridden
    TP (Pin 1)  Term Power *TO* SCSI Bus
    TP (Pin 3)  Term Power *FROM* drive
    TE          Enable Terminators
    PE          Parity Option
    WP          Write Protect

    Drives are shipped with TP, TP, PE and ME installed

    SCSI ID is determined by J6 (or J5)
                 +-----------+
                 |* * * * * *|<---Pin 1
                 |* * * * * *|
                 +-----------+
                  A A A S L R         Drive ID (eg 5 = A2 and A0 installed)
                  2 1 0 S E E         SSP = Spindle Sync
                        P D S         RES = Reserved

    If  you  use  J5 for SCSI ID, A2 are the pair of pins closest to the
    SCSI Connector


--
 Huw Davies                      | e-mail: Huw.Davies@latrobe.edu.au
 Information Technology Services | Phone: +61 3 9479 1550  Fax: +61 3 9479 1999
 La Trobe University             | "My Alfas keep me poor in a monetary
 Melbourne Australia 3083        | sense, but rich in so many other ways"