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Models 0664 M1H and 0664 N1H Jumpers and Configuration
Option jumper blocks
Bit is selected with shunt in place

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

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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