Unit Emergency Power Off Switch; Service Processor (Svp); Disk Drives; Disk Array Frames - HP StorageWorks XP12000 - Disk Array Owner's Manual

Item Label
PS REMOTE/
13
LOCAL
14 LED TEST/CHK RST

Unit emergency power off switch

The UNIT EMERGENCY POWER OFF switch is located on the back of the DKC cabinet. For more
information about this switch, see

Service processor (SVP)

The Service Processor inside the controller performs these functions:
• Collects performance data on the system for diagnostic testing and analysis
• Provides your HP support representative with access to the system
• Hosts system management software
Your HP support representative uses the SVP to configure, maintain, and upgrade the system software
and hardware. The SVP is not a customer-accessible component.
To protect your security, the SVP does not have access to any user data stored on array disks.
If you have extreme availability requirements, an optional second SVP is available.

Disk drives

The DKC must contain at least nine hard disk drives and can contain up to 128. For more information
about disk drives, see the following section about disk drives in the DKUs.

Disk array frames

DKUs are optional cabinets that allow you to expand the disk array's storage capacity. DKUs contain
physical disk drives. The disk array can include up to four DKUs. Four DKUs fully populated with disk
drives provide up to 332 TB of raw storage capacity.
24 HP XP12000 hardware components
Indicator Description
Determines how the disk array is powered on or off. During
normal operation, this switch may be in either position,
depending on your operating environment.
REMOTE: Disk array is powered on/off by the instructions
Switch
of the host PCI (mainframe only).
LOCAL: Disk array is powered on/off by the PS ON/OFF
switch (10). Do not change the switch position unless
directed to do so by HP service personnel.
Used by an HP support representative to test the functioning
of the LEDs on the control panel or to reset various alarms.
During normal operations, this switch should be in the
Switch
middle position between LED TEST and CHK RST. Do not
change the switch position unless directed to do so by HP
service personnel.
"Emergency power off" on page 29.