DEC BA400 Series, Руководство по установке

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• For each DSSI bus or SCSI bus, do not duplicate bus node numbers
for storage elements. You can have only one storage element on bus 0
identified as node 0, one storage element as node 1, and so on.
• By convention, the ISEs are numbered in increasing order from right to
left, starting with 0.
1.5 Power-On Self-Test (POST)
Once the system is turned on, the EF-series and RZ-series ISEs go through a
power-on self-test (POST).
1.5.1 EF-Series POST
POST for an EF-series ISE is executed whenever power is applied. The
execution time for the test can be up to 15 seconds.
On the EF-series, POST performs the following:
• Tests the control module.
• Tests the memory modules.
• Checks the configuration of the hard disk.
POST detects the following types of error conditions:
• Controller errors—Caused by the hardware associated with the controller
function of the drive module. These errors are fatal to the operation of the
ISE since the controller cannot establish a logical connection to the host.
• Device errors—Caused by the hardware associated with the device control
function of the drive module. These errors are not fatal since the ISE can
establish a logical connection and report the error to the host.
If the ISE passes POST, continue to Section 1.6.
1.5.2 RZ-Series POST
POST for an RZ-series ISE is executed during power-up or from a host-initiated
command. The execution time for the test should be less than two seconds.
If the unit passes POST, it waits for a software command such as SHOW
DEVICES. If POST fails, the device will not come on line and will not be listed
in the device listing when the SHOW DEVICES command is issued.
1–24 EF- and RZ-Series Integrated Storage Elements