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C Adding Disk Drives and Expansion Drive Enclosures
HP 3PAR StoreServ 7000 products include 3PAR licensing that enables all functionality associated
with the system. A failure to register the license key may limit access and restrict upgrading of your
system. Before you proceed with upgrading, verify all applicable licenses associated with the
system are registered.
For assistance with registering HP software licenses, visit http://hp.com/support.
There are two types of drive enclosures that are used for expansion:
• The HP M6710 Drive Enclosure (2U24) holds up to 24, 2.5 inch SFF SAS disk drives arranged
vertically in a single row at the front of the enclosure. The back of the enclosure includes two
580 W PCMs and two I/O modules.
• The HP M6720 Drive Enclosure (4U24) holds up to 24, 3.5 LFF SAS disk drives, arranged
horizontally with four columns of six disk drives. The back of the enclosure includes two 580
W PCMs and two I/O modules.
Information About Drive Enclosure Upgrades
• The number of drive enclosures attached to a specific node pair should be determined by the
desired RAID set size and HA Cage protection requirements. Drive enclosures should be added
and configured to meet the HA Cage protection requirement for a specific node pair, and
also consider the RAID set requirement of the customer.
• The distribution of drive enclosures between DP-1 and DP-2 of the node should be done to
achieve maximum balance across the ports.
• When adding both 2U and 4U drive enclosures, they should be mixed on SAS chains (DP-1
and DP-2), added in pairs across node pairs on a four-node system, and balanced across
SAS ports on each controller pair.
Drive Enclosure Expansion Limits
The disk drives in the node enclosure are connected internally through DP-1.
The 7200 node enclosure can support up to five drive enclosures, two connected through DP-1
and three connected through DP-2 on the nodes.
The 7400 node enclosure can support up to nine drive enclosures, four connected through DP-1
and five connected through DP-2 on the nodes. A four-node 7400 configuration doubles the amount
of supported drive enclosures to 18.
Information About Disk Drive Upgrades
You can install additional disk drives to upgrade partially populated drive enclosures.
WARNING! If the StoreServ is enabled with the Data-at-Rest (DAR) encryption feature, only use
the self-encrypting drives (SED). Using a non-self-encrypting drive may cause errors during the
upgrade process.
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