Capella VP31110S


Unformatted Capacity              1,412
Formatted Capacity                1,108
Disks                             2
Heads/Recording Surfaces          4
Tracks per Surface                4,165
Sectors per Track                 97 to 149
Bytes per Sector                  512
Track Density (lpi)               4,350
Recording Density (dpi)           98,600
Areal Density (MB/sq in)          429
Encoding Method                   RLL (1,7)

Performance Specifications

Seek Times  (ms):
     Average Read Seek Time       8.5
     Average Write Seek Time      9.5
     Track-to-Track               1.0 
     Full Stroke                  < 20 

Rotational Speed (RPM)            5,400

Average Latency (ms)              5.56

Internal Data Rate (MB/sec)       46.4 to 70.3

Net Host User Data Rate (MB/sec)  4.5 to 6.9

Buffer-to-Host Transfer Rate
     Fast SCSI-2 (MB/sec)         10 
     Fast Wide SCSI-2 (MB/sec)    20 

Buffer Size (KB)                  1,024

Reliability Specifications

Projected Field MTBF (hours)      800,000

Preventitive Maintenance          Not Required

Data Errors (per bits read): 
      Recoverable                 < 1 in 10  
      Nonrecoverable              < 1 in 10  

Error Correction Method           Reed Solomon 

Warranty (years)                  5

Physical Specifications

Dimensions - inches (mm):
   Width                          4 (101) 
   Length                         5.75 (146) 
   Height                         1.0 (25.4) 

Weight-pounds (kg)                1.08 (0.49) 

Environmental Limits


   Temperature (C)                5 to 55 
   Non-Condensing Humidity (%)    10 to 90 
   Shock (G, 10 ms)               10 
   Vibration (G, 22Hz to 400Hz)   1.0 
   Typical Audible Noise idle
    (dBA @ 1 m, any direction)    35 


   Temperature (C)               -40 to 66 
   Non-Condensing Humidity (%)     8 to 95 

Power Specifications 

 +5V DC +/- 5% Seeking (A, typ)   0.6 
 +12V DC +/- 5% Seeking (A, typ)  0.35
 Idle power (W)                   5.8
 Seek power (W)                   7.0

Capella Jumper Settings 

WARNING: Drive jumpers may not be same as below

Capella VP32210S

   Jumper      Name    Description                      

     TP          -     Termination power                

  Pins 1-2      A0     SCSI ID address selection        
  Pins 3-4      A1                                      
  Pins 5-6      A2                                      

   Pin 7      FLT Out  Fault display LED option         

   Pin 9      BSY Out  Busy display LED option          

   Pin 11      +5VDC   LED anode connection             

   Pin 13       SD     Spin delay option                

   Pin 15        -     Reserved - not used              

   Pin 17       WP     Write Protect option             

   Pin 19       SY     Spindle Sync.                    

Table 1

Termination Enable

One of the requirements of the SCSI bus is that it be properly terminated. If more than one SCSI device is connected to the host, only the last device must be terminated. The Capella disk drive utilizes two (2) 10 pin resistor packs to enable SCSI bus termination.

At the factory, Quantum configures the Capella VP32110S hard disk drive with termination enabled; that is, with both resistor packs installed . To disable termination, remove the two resistor packs from the drive. [Refer to figure 1 for location.]

Termination Power (TP)

It is recommended that the drive be configured to provide Termination Power to the SCSI bus. This ensures that there is sufficient power along the entire SCSI bus. The Termination Power (TP) jumper, when installed, enables termination power to be provided by the disk drive.

At the factory, Quantum configures the Capella VP32110S hard disk drive with termination power enabled; that is, with a jumper installed across the termination power pins on jumper block J5. To disable termination power, remove the jumper from the pins at location J5. [Refer to figure 1 for jumper location.]

SCSI-Bus Device Identification

Used in combination, the jumper settings across reference pins of the Option Connector J3 determine the Capella VP32110S hard disk drive's SCSI-bus device I.D.

To assign a different SCSI ID, change the jumper settings as shown in Table 2.

Pins 5-6  Pins 3-4  Pins 1-2   SCSI ID  

   OFF       OFF       OFF        0     
   OFF       OFF       ON         1     
   OFF       ON        OFF        2     
   OFF       ON        ON         3     
   ON        OFF       OFF        4     
   ON        OFF       ON         5     
   ON        ON        OFF        6     
   ON        ON        ON         7     

Table 2

Spin Delay (SD)

With the Spin Delay jumper installed, across pins 14-15 of Option Connector J-3, the drive will start power up sequence immediately when power is applied. With the Spin Delay jumper removed the drive will power up when a START/STOP command is issued by the host adapter.

By default, Quantum configures the drive with a jumper installed across pins 14-15.

Spindle Sync (SY)

Atlas disk drives support synchronized spindle operation. Master or slave synchronized operation is set through a SCSI Mode Select Page.

When the drive operates as a Master drive, it generates a spindle synchronization reference signal, SPINDL_SYNC_REF L. When operating as a slave, the drive synchronizes its spindle according to the SPINDL_SYNC_REF L input reference. The drive always maintains local speed regulation when no reference signal is applied.

Pin 19, of Option Connector J-3, is provided to facilitate installations where a 2-pin connector for SPINDL_SYNC_REF L will be used. The ground return is pin 20, although pins 2, 4, or 6 can be used for ground return.

Write Protect (WP)

To enable write protection on the drive, install the referenced jumper across pin pair 17-18 of Option Connector J-3. To disable write protection from the drive, remove the jumper from pin pair 17-18.

Remote LED Status Display

Busy and Fault status for Capella VP32110S disk drives can be monitored remotely by connecting a remote Busy and a remote Fault display LED to the drive's Option Connector J-3.

Busy status is monitored remotely by connecting the cathode side of the remote Busy LED to the BSY_OUT L pin. The anode side of the LED connects to the +5 VDC OUT pin.

Fault status is monitored remotely by connecting the cathode side of the remote Fault LED to the FLT_OUT L pin. The anode side of the LED connects to the +5 VDC OUT pin.

Copyright 1995 Quantum Corporation
500 McCarthy Blvd, Milpitas, CA 95035
We are always interested in any suggestions you might have regarding this service.
Note: Some files are available in PDF Format.