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CHAPTER 2 M200 Main Cabinet
Disk Expansion Unit
By using the Disk Expansion Unit, up to 8 disk drives can be installed in the M200 main cabinet.
The Disk Expansion Unit consists of the following components:
Disk cage (including SCSI-BP)
PCI adapter (UltraSCSI Wide Single-Ended)
Expansion power supply unit (requires changing to 120-mm (4.7 inch) square fan: included)
Cables
CAUTION
Be sure to replace the power supply fan when installing the Disk
Expansion Unit. Otherwise, the system will shutdown or disk units
will deteriorate due to a temperature rise in the M200 main cabinet
caused by insufficient cooling.
A Power LED is installed on the SCSI-BP board. If both ACTIVE LED and FAULT LED above a
disk bay do not lights, check to see if the POWER LED on the SCSI-BP board is turned on. If this
POWER LED does not turn on, disk expansion unit or its cable may be faulty.
When installing the Disk Expansion Unit, the installed location (slot) of the PCI card used for
connection must be set. Below shows the setting procedure.
1 First, execute show-scsi command at the ok prompt, to get the path name of the UltraSCSI
card and it’s PCI slot. The followings example shows that a Ultra SCSI card is installed in PCI
slot#6.
ok show-scsi
PCI#6 : /pci@1d,4000/scsi@5,1
PCI#6 : /pci@1d,4000/scsi@5
SCSI#0: /pci@1f,4000/scsi@3
ok
2 Then, set led-control-1 to correspond to the PCI slot by using setenv command at the
ok prompt. The followings example shows that a Disk Expansion Unit connection to SCSI
Conector #1 of the UltraSCSI card in PCI slot#6.
ok setenv led-control-1 /pci@1d,4000/scsi@5
CAUTION
If the installing location (slot) is not set or set incorrectly, the disk
drive may not be hot-swappable. Data may be destroyed as a
result of inadvertently replacing the different disk drive. Be sure to
set the installing location (slot) correctly.
Also, while replacing or initializing NVRAM, set the installing
location again.
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