
S T 9 4 2 2 A    SEAGATE
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 2.5"/SUPERSLIMLINE    Cylinders        |  818|     |
Capacity form/unform   422/      MB        Heads           4|   16|     |
Seek time   / track  12.0/ 3.0 ms          Sector/track     |   63|     |
Controller           IDE / ATA2 FAST/ENHA  Precompensation
Cache/Buffer            32 KB              Landing Zone      818
Data transfer rate    3.000 MB/S int       Bytes/Sector      512
                     11.100 MB/S ext
Recording method     RLL 1/7                        operating  | non-operating
                                                  -------------+--------------
Supply voltage     5 V          Temperature *C         5 55    |    -40 60
Power: sleep          0.2 W     Humidity     %         5 90    |      5 90
       standby        0.2 W     Altitude    km    -0.061  3.048| -0.061  4.572
       idle           0.9 W     Shock        g       100       |    300
       seek           1.0 W     Rotation   RPM      3600
       read/write     1.3 W     Acoustic   dBA        35
       spin-up            W     ECC        Bit
                                MTBF         h     300000
                                Warranty Month
Lift/Lock/Park     YES          Certificates



**********************************************************************
                        L   A   Y   O   U   T
**********************************************************************
CONNER   CFL-420A  QUICK REFERENCE GUIDE REV. C, 12/1994

  +---------------------------------------------------------+
  |                                                         |XX
  |                                                         |XX
  |                               A/C                       |XX 44-pin
  | +----------+              C/D-+++-CS                    |XX Data
  | +----------+                +-+-+-+                     |XX and
  |                                                         |XX Power
  |                                                         |XX
  |                                                         |XX
  |                                                         |XX
  |                                                         |XX
  |                                                         |XX
  |                                                         |XX
  |                                                         |XX
  |                                                         |  1
  |                                                         |XX
  +---------------------------------------------------------+




**********************************************************************
                      J   U   M   P   E   R   S
**********************************************************************
CONNER   CFL-420A  QUICK REFERENCE GUIDE REV. C, 12/1994

 Jumper Setting
 ==============


 CAM Master/Standalone
 ---------------------
    C/D A/C  CS
   +---+---+---+
   |XXX| : | : |
   +---+---+---+


 CAM Slave
 ---------
    C/D A/C  CS
   +---+---+---+
   | : | : | : |
   +---+---+---+


 CAM Cable Select Master or Slave
 --------------------------------
    C/D A/C  CS
   +---+---+---+
   | : | : |XXX|
   +---+---+---+



 ISA Master/Standalone
 ---------------------
    C/D A/C  CS
   +---+---+---+
   |XXX|XXX| : |
   +---+---+---+


 ISA Slave
 ---------
    C/D A/C  CS
   +---+---+---+
   | : |XXX| : |
   +---+---+---+


 ISA Cable Select Master or Slave
 --------------------------------
    C/D A/C  CS
   +---+---+---+
   | : |XXX|XXX|
   +---+---+---+


 Master/Slave Configuration
 --------------------------
 When two drives are daisy-chained on the host interface, one must be
 designated at the master drive (C: drive) and one as the slave drive
 (D: drive). Commands from the host are written in parallel to both
 drives.

 When the C/D jumper on the drive is closed, the drive will assume the
 role of a master. When C/D is open, the drive will act as a slave. In
 single-drive configurations, C/D must remain in the closed (master)
 position.

 For each command sent from the host, the DRV bit in the drive/head
 register selects the master or the slave drive. When the DRV bit is
 reset (0), the master drive is selected, and when the DRV bit is set
 (1), the slave drive is selected.

 Once the drives receive the command, only the drive with jumper C/D
 set to the appropriate position will execute the command. For
 example, if the DRV bit is set, only the slave drive (jumper C/D
 open) will execute the command.

 NOTE
 If the command is a diagnostic command, both drives will execute the
 command and the slave will report its status to the master via the
 Host PDIAG signal.

 Throughout this manual, drive selection always refers to the state of
 the DRV bit and the position of the C/D jumper.

 The drive supports two master/slave modes via the A/C jumper. When
 A/C is open, ATA/CAM master/slave mode is selected. When A/C is
 closed, Conner master/slave mode is selected.


 Supported Master/Slave Modes
 ----------------------------
 There are three different master/slave methods that Conner supports.

 - ISA Original
 - Conner
 - ATA/CAM

 Of these three methods, the drive supports all except ISA/Original
 mode, with which is compatible.


 NOTE
 The ATA/CAM master/slave method is not compatible with the other two
 methods. The Conner mode is backward-compatible to the ISA Original
 mode, but is not compatible with the other.

 These three methods are explained in the following sections. For
 signals followed by a ' ', activate means go low and deactivate means
 go high.


 ISA Original Master/Slave
 -------------------------
 The signals used for master/slave operation and determination are
 Host DASP  and Host PDIAG .

 Host DASP  can be used to:

  - drive an activity LED
  - indicate that the slave drive is present to the master

 The Host PDIAG  is used to indicate that the slave has passed
 diagnostics both at power-on reset (POR) and when the diagnostic
 command is issued.

 At power-on time, the slave drive activates Host PDIAG  and Host
 DASP . Host PDIAG  remains activated from POR until a diagnostic
 command is issued by the host. Once a diagnostic is issued by the
 host, the slave deactivates Host PDIAG  until either:

  - the slave successfully completes the diagnostic command

  - the host issues a reset

 There are no real timing constraints on Host PDIAG  and Host DASP .
 At POR, they are both activated within a second or two. When the
 diagnostic command is issued by the host, the slave inactivates Host
 PDIAG  within 100-200 microseconds and is required to reactivate it
 within 5 seconds (the only timing constraint) if it successfully
 completes the command.

 This scheme works fairly well except for two problems:

 - There is no way to tell when the slave becomes ready. If the slave
   becomes ready much later than the master, the slave will miss any
   command that are issued before it goes not busy because the host
   only polls the master to see if the "controller" is ready.

 - In a two-drive configuration, the Host DASP  line is not available
   to drive a drive activity indicator.

 In this mode of master/slave, master/slave re-configures with either
 a hardware or software reset. A hardware reset is either a POR or
 host reset.

 This version of master/slave is present on generations 1, 2, and 3
 of Conner drives.


 Conner Master/Slave
 -------------------
 To remendy the problem of the host not knowing when the slave was
 ready, Conner developed a backward-compatible solution, which we call
 Conner Master/Slave.

 In Conner Master/Slave, the use of the Host PDIAG  signal has been
 changed slightly during reset so that the slave will indicate when it
 will go not busy. Its use in the diagnostic command has not been
 changed.

 During POR or any host reset, the slave drive activates Host PDIAG
 within 1ms. The master drive waits slightly longer that 1 ms for
 Host PDIAG  to be activated before it determines that no slave is
 present. The slave then deactivates Host PDIAG  when it is ready. The
 master waits:

 - up to 14 seconds for the slave to deactivate Host PDIAG on either
   a POR or a host reset

 - 450 ms for the slave to deactivate Host PDIAG  on a host software
   reset

 If the master times out, it goes not busy.

 In this mode of master/slave, master/slave re-configures with either
 a hardware or software reset. A hardware reset is either a Power On
 Reset (POR) or host bus reset.

 This solution was implemented in generations 4 and greater of Conner
 drives.


 ATA/CAM Master/Slave
 --------------------
 This industry-standard master/slave solution was developed by the CAM
 shortly after the development of the Conner Master/Slave. The
 polarity of Host PDIAG  is opposite that of the Conner solution and
 this is what makes this master/slave scheme incompatible with the
 Conner scheme.

 At power-on time, the slave deactivates Host PDIAG  and then
 activates Host DASP  within 1 ms of either POR or host reset. Host
 DASP  activate indicates that a slave is present. The slave
 activates Host PDIAG  when it is ready to accept commands or after 30
 seconds, whichever occurs first. This period is reduced to 450ms for
 a software reset. A hardware reset is either a POR or host bus reset.

 This solution was implemented in generations 4.5 and greater of
 Conner drives and is selectable with the A/C jumper or the CAM bit in
 the feature word.


