IBM System Storage DS4000, Руководство по техническому обслуживанию аппаратной части

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Table 52. SDG Router LED indicators (continued)
LEDs (G=Green)
(A=Amber) Function On Off Flash
Collision (A) Status Collision
occurred
TEMPERATURE
WARNING (A) Preventive
failure indicator
Temperature
Warning
No temperature
problem
N/A
Alarm (A) Information Temperature
exceeded
No temperature
problem
N/A
Power Main (G) Information Power applied No power N/A
Ready (G) Information SDG Failure if
on for more than
2 sec.
SDG Failure Flashes during
Startup cycle
and once every
second
thereafter
(normal)
POST
POST is divided into two functionally distinct parts: the initial-POST (IPOST) and
the secondary-POST (SPOST)
IPOST is the first stage of POST and it thoroughly tests the on-board, dynamic
random-access memory (DRAM) arrays. IPOST runs from the on-board flash
memory. Upon successful completion, IPOST locates SPOST, copies it to the
DRAM, and then transfers program control to SPOST.
SPOST is the second stage of post. SPOST configures the SDG Router’s PCI bus.
SPOST then locates, loads, and runs the licensed internal code.
Health Check
The health check program queries all subsystems for their operational status. The
health check has four levels. A level 1 health check is the most basic, and health
check level 4 is the most complete check.
Event Log
The SDG Router maintains an event log within its on-board flash file system. You
can query these logs from the SDG Router service port. Event codes and messages
that the SDG Router subsystems generate are recorded in this log file.
Service Port Commands
An extensive command set is available to manage the SDG Router, obtain Status,
and run Diagnostics. The commands described in Table 53 have been extracted
from the SDG Service Guide . They provide you with some basic tools to determine
the functional status of the SDG Router. See Appendixes A and B of the SDG
Service Guide for a description of all the commands.
Table 53. SDG Router service port commands
Group Description Page
diagBoot Used to transition the SDG Router from normal operation to Diagnostic mode
(see normalBoot below)
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IBM TotalStorage DS4000: Hardware Maintenance Manual