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
SAS3 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.
SAS3 cables connect the 5U84 Expansion Storage Shelf to the 5U84 Primary
Storage Shelf through the 5U84 Expansion Storage Shelf's Expansion I/O modules.
SAS3 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 62.
Veritas 5U84 Primary Storage Shelf RAID controllers
The Veritas 5U84 Primary Storage Shelf uses dual, hot swappable Fibre Channel
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 Fibre Channel RAID controllers run RAID levels 6 and 10 on the storage shelf.
RAID 10 is also referred to as RAID 1+0. RAID 6 offers the highest level of data
58
About the Veritas 5U84 Storage Shelves
About the 5U84 Primary Storage Shelf and 5U84 Expansion Storage Shelf rear components