HP XP7 Owner Guide (H6F56-96006)

3 System components
Controller chassis
The controller chassis provides system logic, control, memory, and monitoring, as well as the
interfaces and connections to the disk drives and the host servers. The controller chassis consists
of the following components:
Table 14 Controller chassis
DescriptionItem
.MaxMinName
A CHA is an interface board that provides connection to
the host servers. It provides the channel interface control
8 if 4 DKAs installed.
12 if no DKAs
installed.
2CHA
functions and intercache data transfer functions between the
disk array and the host servers. It converts the data format
between CKD and FBA. The CHA contains an internal
processor and 128 bytes of edit buffer memory.
A DKA is an interface board that provides connection to the
disk drives and SSDs. Provides the control functions for data
40 with no drives2
with drives
DKA
transfer between drives and cache. The DKA contains DRR
(Data Recover and Reconstruct), a parity generator circuit.
It supports eight FIBRE path and offers 32 KB of buffer for
each FIBRE path.
A custom PC that implements system configuration settings
and monitors the system operational status. Connecting the
21Service
processorr
(SVP) SVP to service center enables the storage system to be
remotely monitored and maintained by the HP support team.
This significantly increases the level of support that HP can
provide to its customers.
NOTE: The SVP also provides a communication hub for
the 3rd and 4th Processor blade in Module-0. The SVP is
installed only in Module-0 only (system 0).
In a system with two SVPs, both are installed in the controller
chassis in system 0
Connects the switches, adapters, and service processor.
NOTE: The Hub provides communication connection for
3rd and 4th Processor blade in Module-0. The Hub is
installed in Module-1 only.
21Hub
The full duplex switches serve as the data interconnection
between the CHAs, DKAs, and CMs. They also connect the
42ESW
control signals between the XP7s (microprocessors) and the
CM boards.
Quad core, 2.33 GHz processors are independent of the
CHAs and DKAs and can be shared across CHAs and DKAs
42Processor
Blades
The cache is an intermediate buffer between the channels
and drives. Each cache memory adapter has a maximum
42Cache memory
adapter (CPC)
capacity of 32 GB. An environmentally friendly nickel
hydride battery and up to two Cache Backup Memory Solid
States Disk drives are installed on each Cache Memory
Adapter board. In the event of a power failure, the cache
data will not be lost and will remain protected on the Cache
Backup Memory Solid States Disk drive.
200–220 VAC input. Provides power to the DKC in a
redundant configuration to prevent system failure. Up to four
42AC-DC power
supply
60 System components