HP StorageWorks XP12000 HP StorageWorks XP12000 Disk Array Owner's Guide (AE00 - Page 24

Unit emergency power off switch, Service processor (SVP), Disk drives, Disk array frames

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Item Label Indicator PS REMOTE/ 13 LOCAL Switch 14 LED TEST/CHK RST Switch 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 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 middle position between LED TEST and CHK RST. Do not change the switch position unless directed to do so by HP service personnel. 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 "Emergency power off" on page 29. 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

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Description
Indicator
Label
Item
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
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.
Switch
PS REMOTE/
LOCAL
13
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
middle position between LED TEST and CHK RST. Do not
change the switch position unless directed to do so by HP
service personnel.
Switch
LED TEST/CHK RST
14
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 “
Emergency power off
” on page 29.
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.
HP XP12000 hardware components
24