Table of Contents
Advertisement
The core processor of the RAID Controller is based on an Intel XScale™ RISC
processor running at 600 MHz. The processor has integrated instructions and data
caches that allow for the most frequent instructions to be executed without
having to access external memory. Coupled with nStor's micro kernel, it
processes commands and I/O's at extremely high rates.
The processor's companion chip implements dual independent 64-bit 66MHz PCI
busses. Devices on these busses have independent access to the shared 512 MB
of SDRAM. Also, an integrated XOR accelerator is included for RAID 5 or 50
parity generation.
The RAID Controller disk drive interface uses QLogic ISP 2312 dual Fibre Channel
controllers which takes full advantage of the dual fibre loops on each disk drive.
The controller's host interface also uses QLogic ISP 2312 dual Fibre Channel
controllers which provides two independent ports for host connectivity. Each port
can operate at either 1 Gb/sec or 2 Gb/sec, and the controller will automatically
detect the correct rate. The ports are sometimes referred to as "Host Loops."
Located on the face plate are RAID Controller Status LEDs. Refer to the table
below and the illustration on the following page for descriptions for each LED.
RAID Controller Status LEDs
PWR - GREEN
OVR CUR - RED
PRTNR - RED
DRT - AMBER
H0A/H1A - AMBER
D0A/D1A - AMBER
H0L/H1L - GREEN
D0L/D1L - GREEN
Indicates power is applied.
Indicates controller over current condition exceeds +5V.
If on, it will indicate that the partner controller has failed.
Indicates a dirty cache condition.
Host Loop 0 and 1 Activity.
Drive Loop 0 and 1 Activity.
Host Loop 0 and 1 Link Status
Drive Loop 0 and 1 Link Status
Chapter 1 - Getting Started
RAID Controllers
17
Advertisement
Table of Contents
