DEC 4000 600 series Owner's Manual page 234

Drive ID plugs
changing, 6–23
function, 6–8
using to color-code drives, 6–8
when to change, 6–22
Drives
See Mass storage devices; Tape drives;
Disk drives
DSSI adapters, function of, 7–10
DSSI buses, terminating and extending,
6–20
DSSI device allocation classes, changing,
6–24
DSSI devices
changing allocation classes for, 6–24
cluster capability, 6–4
DSSI ID plugs, 6–8
See also Drive ID plugs
DSSI parameters, 6–26
DSSI VMScluster configurations, 6–4
Dual CPU systems, 6–4
DUP driver utility, 6–26
E
Environment variables
defined, 4–1
described, 4–2
displaying current status, 4–2
preset values, 4–2
setting before booting, 1–14, 4–2
tasks after setting, 4–19
tasks before setting, 4–4
Ethernet ports, 2–2
Ethernet, invoking console mode across, 2–5
External devices, 1–11
connecting to the system, 6–7
guidelines for connecting, 6–18
Index–4
F
Fan failure light, 9–7
Fast SCSI
described, 5–5
extending, 6–18
Fbus
See Futurebus+ subsystem
FEU lights, 9–6
Fixed-disk drives, 5–5
See also Disk drives; specific drives
Futurebus+ subsystem
described, 7–4, 7–11
module location, 1–7
G
Grounding wrist strap, 8–6
H
Halt button
location, 1–6
using, 1–18
Halt procedure, 1–18
Halt startup action, 4–5
Head cleaning, 5–40
Head cleaning cassette, 5–40
Help
accessing all types, 1–22
accessing in console mode, 3–3
types available, 1–22
help command, 3–13
I
I/O module
described, 7–7
location, 1–7
I/O subsystem, 7–4
init command, 3–14
Insert mode, 2–8