HP 3PAR StoreServ 10000 Storage Physical Planning Manual

Rack Space Considerations
HP highly recommends installing the node-chassis and all drive chassis in contiguous rack space.
This is especially true for the initial installation as it ensures Fibre Channel cables will reach and
provides consistency for servicing and installation. When adding additional drive chassis at a later
date, it is desirable to place them with the initial chassis, but it is not required.
While planning the site configuration, it is also important to note that the racks must minimally
accommodate equipment totalling 15U in height for the 10400 with the primary dimensions shown
in Figure 47 (page 73) and Figure 48 (page 74).
Your site configuration should also state which block of contiguous space within the rack you would
like the 3PAR equipment installed, such as the top, bottom or middle. Part of this determination
should be based on where your host cables are sourced. Figure 50 (page 75) shows the preferred
configuration.
Figure 50 Recommended Third-Party Rack Configuration
Build the rack from bottom to top.
RETMA Rail Spacing
The Radio Electronics Television Manufacturers Association (RETMA) railing is a standard of rack
spacing. A 10400 node chassis requires 15U of spacing and 1U for the cable tray. The drive
chassis requires 4U of spacing. The service processor requires 1U of spacing. See Figure 51
(page 76) for the RETMA rack spacing diagram.
• One Rack Unit (RU or U) is 1.75 inch (44.45 mm) and contains three holes spaced by 1/4
inch.
• The space between a rack unit is 1/8 inch.
Dimensional Requirements 75