Nortel Meridian 1 Manual page 226

8 Simultaneously press both RLD buttons on the NTND10 CMA cards.
When prompted, remove disk A1 from the A drive and insert disk A2.
System messages similar to the following will appear:
SYS000
INSERT DISK A2 INTO DRIVE A
SYSLOAD RLS: xxISSUE:x
DONE
INI000
9 Immediately following the system initialization sequence, remove
disk A2 from drive A and insert disk A1.
10 Log into the system.
11 Copy the contents of the data disks to the hard disk by entering
LD 43
RES
Insert the additional system disk (A2) when requested. When the restore
sequence is complete, enter
****
12 Remove disk A2 from drive A and insert disk A1.
13 Set the ENB/DIS switch on each MSI or EMSI card to DIS.
14 Remove each MSI or EMSI card. For MSI cards, set position 4 on switch
SW3 to ON. For EMSI cards, set position 4 on switch SW2 to ON.
15 Reinstall each MSI or EMSI card and set the ENB/DIS switch to ENB.
16 If you are installing an MDU and the system is not configured for a hard
disk drive, change the configuration record:
LD 17
IOTB
ADAN
****
Upgrade system installation Upgrading to Meridian 1 system options
to load the program
to copy the entire contents of the backup to the hard
disk
to exit the program
to load the program
enter YES to change I/O devices
enter CHG HDK 0 to add a hard disk unit
to exit the program
SL-1 RT system upgrades 5-41