0664
0664-x1H   2.0 GB, 3.5x1.6, 5400 RPM What is the difference between the -M1H and -N1H?

Performance
  Rotational speed
5400 RPM
  Media transfer rate (avg)
5.2 MB/sec (instantaneous)
  Interface transfer rate (max
20.0 MB/sec (synchronous)(sustained)
  Interface transfer rate (max)
10.0 MB/sec (asynchronous)
  Latency average
5.56 ms
  Seek time (typical)
    Average (read)
9.2 ms
    Track to track
0.6 ms
    Full track
17.4 ms

NOTE: The 0664 uses 6x32 mounting screws, no longer than 3.8mm.

WARNING: The file's mounting frame is electrically isolated from the file's disk enclosure. The disk enclosure is not at ground potential. Therefore any user mounting scheme must not result in the disk enclosure being shorted to ground. 

PLEASE NOTE: The 0664 frame supports Industry Standard mounting holes on the sides and bottom, as well as IBM's bottom mounting holes which are common with the old IBM frame. 

Location of Option jumper blocks

Figure 9 50 Pin SCSI Model M1H 

Figure 10 Address Determination - 50 Pin SCSI Model M1H 
Bit 0
Bit 1
Bit 2
Address
off
off
off 
0
on
off
off
1
off
on
off
2
on
on
off
3
off
off
on
4
on
off
on
5
off
on
on
6
on
on
on
7
Bit is selected with shunt in place 

Figure 8 68 Pin SCSI Model M1H 

Figure 11 Address Determination - 68 Pin SCSI Model M1H
Bit 0
Bit 1
Bit 2
Bit 3
Address
off 
off
off
off
0
on
off
off
off
1
off
on
off
off
2
on
on
off
off 
3
off
off
on
off
4
on
off
on
off
5
off
on
on
off
6
on
on
on
off
7
off
off
off
on
8
on
off
off
on
9
off
on
off
on
10
on
on
off
on
11
off
off
on
on
12
on
off
on
on
13
off
on
on
on
14
on
on
on
on
15

Note 1: If Auto Start Shunt is not on, the file starts by SCSI command only.
Note: In the charts above "off" means jumper is not in place and "on" means jumper is in place. 

SCSI bus terminators 
0664 has no internal SCSI bus terminators. The system is responsible for properly terminating the SCSI bus. A regulated 110 Ohm terminator is recommended for reliable fast operations (ie, transfer speeds greater than 5M transfers/sec). Split resistor or regulated terminations may be used for systems that do not plan fast data transfers. Some of the terminator possibilities for 0664 are listed in Figure 6. 

SCSI bus termination power 
Termination power is optionally provided for systems that desire to use it. In order to use the 0664 termination power, the user needs to install a jumper between pins B8 and A8 of the Options block. The jumper should only be installed on one device, which should be the last device on the SCSI bus (ie, the device that is physically closest to the terminator). 0664 68-pin models can source up to 2.0 Amps of current at 5.0 Volts (plus/min 5%) for termination power. 0664 50-pin models can source up to 1.5 Amps of current at 5.0 Volts (plus/min 5%) for termination power. 
 
Data Transfer Rates
50-Pin Terminators
68-Pin Terminators
<5M transfers/sec
Data Mate DM500-06-0
Data Mate DM2050-02-68S
Data Mate DM500-06-R
Data Mate DM2050-02-68R
Data Mate DM2000-02-R
> 5M transfers/sec
Data Mate DM500-06-R
Data Mate DM2050-02-68R
Data Mate DM2000-02-R

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