Term used for E2700 and
E5600 storage arrays, and
EF560 flash arrays
Term used for E2800 and
E5700 storage arrays, and
EF570 flash arrays
Definition
controller canister
controller canister
The component in a controller-
drive tray or controller shelf
that includes a controller card,
a battery, and–optionally–a
host interface card.
ESM (environmental service
module)
IOM (I/O module)
The component in a drive tray
or drive shelf that manages the
activities performed by the
enclosure.
power-fan canister
power-fan canister
The component in an 12-drive
or 24-drive enclosure that
includes the power supply (or
PSU) and integrated fans.
Keep in mind that some drive shelves (drive trays) can be used with E2800 or E5700 controller
shelves as well as with other controller-drive trays. The terminology that applies for this hardware
depends on the context in which it is used. Where either terminology might apply, this document uses
the newer terminology. The first occurrence of the term is followed by the alternative term in
parentheses — for example, controller shelf (controller drive tray).
The controllers configure, access, and manage the storage capacity of the drives in the controller
shelf (or controller drive tray) and the storage capacity of the drives in any attached drive shelves (or
drive trays). The controllers also support connections to hosts. A controller shelf with, optionally, any
attached drive shelves (drive trays) comprise a storage array. With SANtricity System Manager, you
manage a storage array through a web interface from a computer with an Ethernet connection to the
controller shelf. With SANtricity Storage Manager, you manage a storage array through an ethernet
or in-band attached host, called the management station.
A controller shelf (controller drive tray) can be attached to one or more expansion drive shelves (or
drive trays) to increase the capacity of a storage array or to increase the redundancy of volume groups
or disk pools in the storage array. Expansion ports on the controllers connect to drive ports on the
environmental services modules (ESMs) of the drive trays or the I/O modules (IOMs) in the drive
shelves. A drive tray or drive shelf can connect to controllers indirectly through another drive tray or
drive shelf.
Host channels and drive channels
In this document, the term
channel refers to a path for the transfer of data and control information
between a host and a controller shelf (controller-drive tray), or between drive shelves (drive trays)
and an attached controller shelf (controller drive tray). A data path from a host to a controller shelf is
a
host channel. A host channel might be Fibre Channel, InfiniBand, iSCSI, or SAS. A path from a
drive shelf to a controller shelf is a
drive channel. Each drive channel is defined by a series of SAS
devices connected through expanders.
In an E2700 controller drive tray or E2800 and E5700 controller shelves, each controller has one
drive channel along with an internal SAS expander (switch) that enables both drive ports on the
controller to share that channel. Other models of controller shelf use direct port connections. With
direct port connections, there is a one-to-one correspondence between ports and channels.
Note:
When you mix different types of drive shelves, you must consider the total number of drive
bays that are available in the final configuration of the storage array. Your configuration must meet
both the limit on the total number of drive bays and the limit on the number of shelves in the
storage array.
8 |
Summary of Contents for StorNext QD7000
Page 1: ...Hardware Cabling Guide StorNext QD7000 Firmware 8 40 xx xx 6 68683 01 Rev A...
Page 7: ...Preface Hardware Cabling Guide vii...
Page 10: ...E Series Hardware Cabling Guide December 2017 215 11792_B0 doccomments netapp com...
Page 11: ......
Page 90: ...One E5660 controller drive tray and one DE6600 drive tray Drive shelf or drive tray cabling 81...
Page 106: ...One E2760 controller drive tray and one drive tray Drive shelf or drive tray cabling 97...