Controller Reset And Led Indicators; Table 2-1 Led/Reset Switch Interface - Compaq StorageWorks RAID Array 3000 Controller Shelf User Manual

Stripesets (RAID 0) combine disk drives in serial to increase transfer or
requests rates.
Mirrorsets (RAID 1) combine disk drives in parallel to provide a highly
reliable storage unit.
RAID 4 provides striping with a fixed parity drive.
RAIDsets (RAID 5) combine disk drives in serial— just like
stripesets— but also store parity data to ensure high reliability.
Stripe mirrorsets (RAID 0 + 1) combine mirrorsets in serial to provide
the highest throughput and availability of any storage unit.

Controller Reset and LED Indicators

Figure 2– 4 shows the front panel of the controller. All LEDs are numbered
from left to right. The reset button (LED 0) flashes green about once every
second (heartbeat) to indicate that the controller is operating normally. LEDs 1
through 4 display host and disk channel activity (amber). LED 5 (normally
Off) turns On red during a controller failure. The LED/Reset switch interface
is listed in Table 2– 1.
LED #
LED/Reset Switch Interface
Name
0 Heartbeat/LED controller reset switch (green)
1 Host channel 0 activity LED (amber)
2 Host channel 1 activity LED (amber)
3 Disk channel 0 activity LED (amber)
4 Disk channel 1 activity LED (amber)
5 Fault LED (red)
RAID Array 3000 Controller 2-5
Table 2-1