Northern Telecom DMS-100 Series Maintenance Manual page 44

4-10 Disk drive procedures
Table 4-1
Allowed disk drive unit mode changes
Initial Mode Final Mode
A PRIME A ONLY
A PRIME B PRIME
A PRIME B ONLY
A ONLY A PRIME
A ONLY B PRIME
1
A ONLY B ONLY
B PRIME B ONLY
B PRIME A PRIME
B PRIME A ONLY
B ONLY B PRIME
1
B ONLY A ONLY
B ONLY A PRIME
No Mode A ONLY
No Mode B ONLY
A ONLY No Mode
B ONLY No Mode
Notes:
Note 1: This change is to be used for specific DISK FULL recovery procedures only. Contact NT if it becomes necessary to
use this mode change.
297-1001-537 Standard 01.02 December 1993
Allowed
yes/no
Y
Y
Y
Y
N
1
Y
Y
Y
Y
Y
1
Y
N
Y
Y
Y
Y
End
Remarks/conditions
Allowed if the B disk is initialized.
Allowed if the A disk is initialized.
Allowed if the A disk is initialized.
Allowed if the B disk is initialized.
Changes A disk to uninitialized, stores A disk
status on A disk. If B disk was initialized, it also
changes to uninitialized; B disk status stored on
B disk.
Changes B disk to uninitialized, stores B disk
status on A disk. If A disk was initialized, it also
changes to uninitialized; A disk status stored on
A disk.