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2-20
DuraStor 6220SS/7220SS Installation and User’s Guide
When you add a jumper to JP2, you disable automatic termination.
In this configuration, the daisy-chained RAID appliance or the host
connection to Channel 2 provides the termination.
SAF-TE Controller Card
The SAF-TE controller card of the DuraStor 312R (see
Figure 2-21
)
is installed into the back of the storage enclosure, just above the
disk I/O card. It contains the SAF-TE switches and an RS-232 serial
communications port.
Figure 2-21. DuraStor 312R SAF-TE Controller Card
Warning:
The SAF-TE controller card is
not hot-swappable
.
You must turn the power off to the DuraStor 312R storage
enclosure to replace this card. See
Powering Off
on
page 3-54
.
The SAF-TE controller card monitors the disk drives, PSUs, cooling
fans, and enclosure temperature, and continually reports
conditions to the host system. It also sets the drive ID (drive
configuration), the SCSI bus mode, and the disk drive start/spin-
up options.
SAF-TE CONTR
OLLER
RS-
232
D
B
A
0
A
1
S
0
S
1
S
2
D
L
R
M
Drive Address Configurations
and Drive Start/Spin-up
Switches
RS-232 Serial Communications Port
DuraStor IUG.book Page 20 Wednesday, January 30, 2002 10:49 AM