HP 3PAR StoreServ 7450 4-node HP 3PAR StoreServ 7450 Storage Installation Guid - Page 87

C Adding Hard Drives and Expansion Drive Enclosures, Information About Drive Enclosure Upgrades

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C Adding Hard Drives and Expansion Drive Enclosures HP 3PAR StoreServ 7450 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, visithttp://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 SSDs 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 SSDs, arranged horizontally with four columns of six 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 SSDs in the node enclosure are connected internally through DP-1. The 7450 two controller node enclosure can support up to five drive enclosures, two connected through DP-1 and three connected through DP-2 on the nodes. The 7450 four controller node enclosure can support up to nine drive enclosures, four connected through DP-1 and five connected through DP-2 on the nodes. A 7450 four controller node configuration doubles the amount of supported drive enclosures to 18. Information About Hard Drive Upgrades You can install additional hard 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. 87

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C Adding Hard Drives and Expansion Drive Enclosures
HP 3PAR StoreServ 7450 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
h
t
tp://hp
.co
m/su
ppo
r
t
.
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 SSDs 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 SSDs, arranged
horizontally with four columns of six 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 SSDs in the node enclosure are connected internally through DP-1.
The 7450 two controller node enclosure can support up to five drive enclosures, two connected
through DP-1 and three connected through DP-2 on the nodes.
The 7450 four controller node enclosure can support up to nine drive enclosures, four connected
through DP-1 and five connected through DP-2 on the nodes. A 7450 four controller node
configuration doubles the amount of supported drive enclosures to 18.
Information About Hard Drive Upgrades
You can install additional hard 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.
87