Table of Contents
Advertisement
About the Veritas 5U84 Storage Shelves
49
About the 5U84 Primary Storage Shelf and 5U84 Expansion Storage Shelf rear components
Five high performance fan modules connect to the storage shelf's midplane
connector through the middle slots. Each fan module contains two contra-rotating
high performance fans, along with separate power and control circuits for each
internal fan.
Two redundant Power Supply Units (PSUs) are located in slots beneath the fan
modules.
To operate, the 5U84 Primary Storage Shelf must have at least one functioning
RAID controller, one functioning power supply unit, and four functioning fan modules.
5U84 Expansion Storage Shelf
The 5U84 Expansion Storage Shelf uses two Expansion I/O modules, which are
located in the top two slots of the back panel. The Expansion I/O modules provide
SAS-3 I/O data transfers between the 5U84 Primary Storage Shelf and the 5U84
Expansion Storage Shelf. The Expansion I/O modules also provide I/O data transfers
between the first 5U84 Expansion Storage Shelf and up to two additional 5U84
Expansion Storage Shelves.
SAS-3 cables connect the 5U84 Expansion Storage Shelf to the 5U84 Primary
Storage Shelf through the 5U84 Expansion Storage Shelf's Expansion I/O modules.
SAS-3 cables are also used to daisy chain up to two additional 5U84 Expansion
Storage Shelves to the first 5U84 Expansion Storage Shelf.
Five high performance fan modules connect to the storage shelf's midplane
connector through the middle slots. Each fan module contains two contra-rotating,
high performance fans, along with separate power and control circuits for each
internal fan. The device must have at least one functioning RAID controller, one
functioning power supply module, and one functioning fan module.
Two redundant Power Supply Units (PSUs) are located in slots beneath the fan
modules.
To operate, the 5U84 Expansion Storage Shelf must have at least one functioning
Expansion I/O module, one functioning PSU, and four functioning fan modules.
See
"Veritas 5U84 Expansion Storage Shelf Expansion I/O modules"
on page 52.
Veritas 5U84 Primary Storage Shelf RAID controllers
The Veritas 5U84 Primary Storage Shelf uses dual, hot swappable SAS-3 RAID
controllers. These controllers create and manage the 5U84 Primary Storage Shelf
disk drive RAID sets that contain backed up data. They also create and manage
the RAID sets on 5U84 Expansion Storage Shelves when those are attached to
the 5U84 Primary Storage Shelf.
The SAS-3 RAID controllers run RAID level 6 on the storage shelf. RAID 6 offers
the highest level of data protection. It allows simultaneous write operations, while
Advertisement
Table of Contents
