Identifying Storage System Components; Understanding Component Numbering; Drive Enclosures - HP 3PAR StoreServ 7000 Troubleshooting Manual

1 Identifying Storage System Components

NOTE: The illustrations in this chapter are used examples only and may not reflect your storage
system configuration.

Understanding Component Numbering

Due to the large number of possible configurations, component placement and internal cabling is
standardized to simplify installation and maintenance. System components are placed in the rack
according to the principles outlined in this chapter, and are numbered according to their order
and location in the cabinet.
The Storage system includes the following types of drive and node enclosures:
The HP M6710 Drive Enclosure (2U24) holds up to 24, 2.5 inch small form factor (SFF) Serial
Attached SCSI (SAS) disk drives arranged vertically in a single row on the front of the enclosure.
Two 580 W power cooling modules (PCMs) and two I/O modules are located at the rear of
the enclosure.
The HP M6720 Drive Enclosure (4U24) holds up to 24, 3.5 inch large form factor (LFF) SAS
disk drives, arranged horizontally with four columns of six disk drives located on the front of
the enclosure. Two 580 W PCMs and two I/O modules are located at the rear of the enclosure.
The HP 3PAR StoreServ 7200 and 7400 (two-node configuration) storage enclosures hold up
to 24, 2.5 inch SFF SAS disk drives arranged horizontally in a single row located on the front
of the enclosure. Two 764 W PCMs and two controller nodes are located at the rear of the
enclosure.
NOTE: In the HP 3PAR Management Console or CLI, the enclosures are displayed as DCS2 for
2U24 (M6710) , DCS1 (M6720) for 4U24, and DCN1 for a node enclosure.

Drive Enclosures

The maximum number of supported drive enclosures depends on the model and the number of
nodes.
Disk Drive Numbering
The disk drives are mounted on a drive carrier and reside at the front of the enclosures. There are
two types of disk drives for specific drive carriers:
Vertical, 2.5 inch SFF disks. The 2U24 enclosure numbering starts with 0 on the left and ends
with 23 on the right. See
Horizontal, 3.5 inch LFF disks. The 4U24 enclosure are numbered with 0 on the lower left to
23 on the upper right, with six rows of four. See
Figure 1 (page 10).
Figure 2 (page 10).
Understanding Component Numbering 9