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Models 0664 M1H and 0664 N1H Jumpers and Configuration


Option jumper blocks

Bit is selected with shunt in place
Image
Figure 9 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
Figure 10 Address Determination - 50 Pin SCSI Model M1H

 

Bit is selected with shunt in place
Image
Figure 8 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
Figure 11 Address Determination - 68 Pin SCSI Model M1H

Note 1:If the 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.

 

Data organization

Capacity  (All Models)
   Bytes/         gross          formatted          logical
  logical        sectors/         capacity          blocks/
   block          track            (bytes)           file
  -------        ---------      -------------      ---------
    256            160          1,730,936,320      6,761,470
    512             94          2,013,716,480      3,933,040
    520             92          2,000,611,600      3,847,330
    524             92          2,016,000,920      3,847,330

Cylinders
   Total cylinders                       2870
   User cylinders                        2857
Tracks/cylinder                          15
User bytes/sector                        256-744
  (even number of bytes only)
User bytes/logical block                 256-744
  (numbers of bytes evenly divisible by 2 only)
Overhead bytes/sector                    104
Sectors/logical block                    1 (for 256
                                         less than or equal to
                                         ub/lba less than or equal
                                         to 744)
User bytes/logical block                 256-744
  (numbers of bytes evenly divisible by 2 only)
Band 1 user cylinders                    1,903
   spares/cylinder                       30
Band 2 user cylinders                    954
   spares/cylinder                       40
Last cylinder extra spares               80
Note: Banding as defined here refers to the number of spare sectors provided per cylinder to reallocate defective sectors. Band 2 cylinders are those nearer the inside diameter of the data surfaces. These have additional spare sectors since the likelihood of defective sectors is higher in this region. This feature does not affect the instantaneous media data rate which is constant across all cylinders.

 


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