Honeywell 6000 Series Reference Manual page 54

• Exchanging disk packs when requested or when a disk pack drive fails
• Releasing a device to exchange disk packs if a spare is not available
when the failure or the exchange is reque sted
• Monitoring for and resolving temporary alert conditions
• Notifying the local Honeywell field service engineer when alerts or .
malfunctions cannot be resolved readily
• Starting and stopping the DSC and de,,'ices when required
• Keeping the equipment and area clean
• Handling and maintaining the disk packs properly
• Perform.ing emergency procedures if required
DSC Operation
DSC operation consists of turning cabinet power on and off when required; monitoring
the various indicators for operational status, correcting any temporary error or malfunction
halts, and initializing and starting the nBC. For more information refer to DSC Operating
Controls and Indicators.
DSU Operation
nsu operation consists of turning cabinet power on and off when required; monitoring
the various indicators for operational status; correcting temporary alert conditions;
restricting a DSU to read-only operations when required; stopping and starting the disk
drive and installing or changing disk 'packs when requested or needed (refer to DSU
Operating Controls and Indicators).
DSU 190 INITIALIZA TION
Perform the following procedure to initialize a DSU190 (only).
1. Locate the ONLINE rotary swit:::h. It is the third switch from the left
on the maintenance panel inside the logic chas sis door.
2. Set the ONLINE rotary switch to the OFF LINE position; then turn back
to the ONLINE position.
NOTE: Switching from OFF LINE to ONLINE positions causes
general reset.
DSU190 DISK PACK INSTALLATION
Make certain that the disk pack
t:>
be installed bas been cleaned and rn.aintained
properly.
1. Raise drive front cover.
NOTE: A spindle lock mechanism (ratchet brake) actuated when the
front cover is opened holds
the
spindle stationary while
a
disk pack is loaded.
3-8 DB37