Post Error Messages; Switching Of Boot Pair - NEC Express5800/R310g-E4 User Manual

Chapter 3 Setup

1.1.2 POST Error Messages

If POST detects an error, an error message appears on the screen. For descriptions of error messages, causes,
and countermeasures, see Chapter 1 (6.2. POST Error Message) in Maintenance Guide.

1.1.3 Switching of boot pair

The CPU/IO module 0 or 1 is started depending on the primary/secondary status of modules when the server
was shut down the last time. At the first startup after AC OFF, the CPU/IO module (0 or 1) powered on first is
managed as primary, and the module powered on later is managed as secondary.
If POST or OS startup does not complete normally, the server will automatically restart. In this case, the other
CPU/IO module (secondary) is determined as primary module, and POST or OS runs on that module (switching
of boot pair).
If POST does not complete normally on both CPU/IO modules, the server will stop with the state of DC OFF or
POST halts with an error message displayed.
The following devices are connected to the primary CPU/IO module. When one CPU/IO module is disconnected
because of a failure, the other module is selected automatically to continue operating.

VGA (display)

USB device (keyboard, mouse, server switch unit, Flash FDD, optical disk drive)

If the Flash FDD is connected to a Windows model, the drive letter may change from A
Note
to B by switching CPU/IO modules. Changing of the drive letter does not affect the
operation of the server. If the drive letter is changed, access the Flash FDD with the
changed drive letter.

For Windows models, the drive letter of the optical disk drive is re-assigned
automatically. The unused letter is assigned to the drive in the order of D to Z. If you
want to set the fixed drive letter to the optical disk drive, specify the letter which is not
assigned in the order of D to Z after setting the hard disk drive letter.
Express5800/R310g-E4, R320g-E4, R320g-M4 User's Guide
1. Turning on the Server
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