Sun Enterprise 250

The Sun Enterprise 250 is an entry-level UltraSPARC II server available in both rackmount (7U?) and desk-side variants. The system is capable of up to two CPUs at speeds of 250MHz, 300MHz or 400MHz. It can take up to two hot-swappable 350W Powersupplies in a redundant configuration.

Storage-wise, the system features six hotswap bays behind a door in the front (above, right). These bays use the same sort of caddys as the Netra T1/200, Ultra 1 and other systems except with a metal panel screwed on to the underside of the drive to protect its electronics. Above the door is a pair of 5.25" bays and one 3.5" bay. These are for the SCSI DVD-ROM drive (standard) and the optional Tape and Floppy drives.

If the system has two powersupplies installed but you only plug one in you will get lots of warnings about a failed power supply. To avoid this you can either plug both in or remove one so it is no longer plugged into the systems power distribution board (so the system doesn't know its there).

Key

[Key] The key used to lock the door is also used to start the system (right). For this reason I keep the key tied to the system with a bit of green string long enough for it to reach both the door lock and the power switch but short enough to not get lost.

The key switch has four positions:

Name	Icon	Description
Power On		Starts the system. If the system is off (eg you shut it down using the OpenBoot `power-off` command) the keyboard power button will work in this state.
Diagnostics		Starts the system and runs diagnostics
Lock		Starts the system and locks the system. This disables the Stop-A and terminal Break commands preventing access to the OpenBoot console
Standby		Switches off internal components and puts the power supplies into standby. The keyboard power button does not work in this state

LEDs

[Status LEDs] Under the key switch is a set of six LEDs, most of which indicate fault conditions.

Name	Icon	Description
Power-on		Stays on when the keyswitch is in the On, Diagnostics or Locked position and the system is on
General fault		Blinks slowly during POST, blinks rapidly during OpenBoot diagnostics and says lit when a fault is detected
Activity		Blinks continuously to indicate that the system is operating normally
Disk fault		Lights to indicate a fault in one or of the hard disks. When lit, one or more disk LEDs may also be lit indicating the source of the fault
Temperature fault		Lights to indicate an over-temp condition
Powersupply Fault		Lights to indicate a power supply has failed. LEDs on the rear of the system indicate which PSU has failed.

Systems

I have only one of these named e250.

Documentation

http://download.oracle.com/docs/cd/E19088-01/250.srvr/index.html

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