Identifying Storage System Components; Understanding Component Numbering; Drive Enclosures; Disk Drive Numbering - 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

Because of the large number of potential 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 numbered according to their order
and location in the cabinet.
The storage system can include two types of drive and node enclosures:
The HP M6710 Drive Enclosure (2U24) holds up to 24, 2.5 inch small form factor (SFF) SAS
disk drives arranged vertically in a single row at the front of the enclosure. The back of the
enclosure includes two 580W PCMs and two I/O modules.
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. The back of the enclosure
includes two 580W PCMs and two I/O modules.
The HP 3PAR StoreServ 7200 and 7400 (two-node) Storage enclosures hold up to 24, 2.5
inch SFF SAS disk drives arranged vertically in a single row. The back of the enclosure includes
two 764W PCMs and two controller nodes.
The HP 3PAR StoreServ 7400 (four-node) Storage enclosure holds up to 48, 2.5 inch SFF SAS
disk drives arranged in two vertical rows. The back of the enclosure includes four 764W
PCMs and four controller nodes.
NOTE: When the enclosures display in the HP 3PAR Management Console or CLI, they are DCS2
for 2U24 (M6710) , DCS1 (M6720) for 4U24, and DCN1 for a node enclosure.

Drive Enclosures

There are two types of drive enclosures. The 4U drive enclosure has 24 horizontal LFF drives with
four columns of six disk drives. The 2U drive enclosure has 24 SFF disk drives arranged vertically
in a single row. The maximum number of supported drive enclosures differs depending on the
model and the number of nodes.

Disk Drive Numbering

Disk drives are a disk mounted on a drive carrier. They are located in the front of the enclosures.
There are two types of disk drives:
Vertical, 2.5 inch SFF disks. The 2U24 enclosure numbering starts with 0 on the left and ends
with 23 on the right.
Horizontal, 3.5 inch LFF disks. The 4U24 enclosure are numbered with 0 on the lower left
and 23 on the upper right, with six rows of four. The numbering starts on the lower left and
goes across to 3 on the lower right. The next row up will be 4-7, then 8- 1 1,12- 1 5,16- 1 9, the
top row will be 20 on the upper left and 23 on the upper right.
6 Identifying Storage System Components