
P H D - 1 4 0 0   P O R T A B L E    WESTERN DIGITAL
                                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 3"/SUPERSLIMLINE      Cylinders        | 2792|     |
Capacity form/unform  1440/      MB        Heads           4|   16|     |
Seek time   / track  14.0/ 5.0 ms          Sector/track     |   63|     |
Controller           PCMIDE 50-PIN         Precompensation
Cache/Buffer           128 KB DRAM         Landing Zone
Data transfer rate    4.000 MB/S int       Bytes/Sector      512
                     16.600 MB/S ext PIO4
Recording method     GCR8/9PRML                     operating  | non-operating
                                                  -------------+--------------
Supply voltage     5 V          Temperature *C         5 55    |    -40 60
Power: sleep          0.1 W     Humidity     %         8 85    |      5 95
       standby        0.2 W     Altitude    km    -0.300  3.000| -0.300 12.000
       idle           1.0 W     Shock        g       100       |    300
       seek           3.0 W     Rotation   RPM      4536
       read/write     3.0 W     Acoustic   dBA        38
       spin-up        5.0 W     ECC        Bit   REED SOLOMON,SMART
                                MTBF         h     300000
                                Warranty Month        36
Lift/Lock/Park     YES          Certificates     CSA,EN55022-4,EN60950,FCC,...

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                      J   U   M   P   E   R   S
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WESTERN  PHD1400  TECHNICAL REFERENCE MANUAL 79-860024-000 1997

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

 Drive Configuration
 -------------------
 All configurations of the WD Portfolio drive use CSEL line to
 dictate the master or slave drive identify.

 The drive address is 0 (Master or Single) if CSEL is low, or 1
 (Slave) if CSEL is high.

 NOTE
 The WD Portfolio drive autodetects whether it is a master or slave
 when CSEL is driven low.



 Drive Active/Slave Present
 --------------------------
 Pin 23
 This open collector output is a time-multiplexed signal indicating
 drive active or slave present. At reset, this signal is an output
 from the slave drive and an input to the master drive, showing that
 a slave drive is present. For all times other than reset, DASP- is
 asserted by the master and slave drives during command execution.


