Front-End Director - Hitachi G1000 Hardware Manual

Item Name
Service
3
Processor
(SVP)
or Hub
back-end
4
director or
(optional)
front-end
director
front-end
5
director
(host I/O
module)
Cooling fan
6
(exhaust)
FED or VSD
7
slot
*
Achieved FIPS 140-2 Level 1 certification.

Front-end director

A front-end director (FED) is a pair of blades that are installed in the
controller. It connects the storage system to the host servers, processes
channel commands from hosts, manages host access to the cache, and
controls the transfer of data between the hosts and the controller cache.
Hitachi offers the following FEDs:
• iSCSI
• Fibre Channel
• FICON (shortwave and longwave)
• Fibre Channel over Ethernet (FCoE)
The Fibre Channel FED can be configured with either shortwave or longwave
host connectors. The FICON FEDs are configured with either longwave or
shortwave connectors that match the wavelength of the mainframe ports.
32
Hitachi Virtual Storage Platform G1000, G1500, and Virtual Storage Platform F1500 Hardware Guide
Min Max
0 1
0 if 4
diskless
2 with
drives
1 2 to 5 with
drives
6 if diskless
system
5 5
0 4
This space can be empty or can contain either a second SVP or
a hub. When a second SVP is installed, the primary SVP is the
active SVP, and the secondary SVP is the hot idle SVP with
active Windows. A hub facilitates the transfer of information
from the VSD pairs to the primary SVP.
A back-end director (BED) provides connection to the HDDs,
SSDs, and FMDs. It controls functions for data transfer between
the drives and the cache.
VSP G1000, VSP G1500, and VSP F1500 support two types of
back-end directors:
• Standard back-end director
• Encrypting back-end director
Important: Each back-end director and front-end director
consists of a set of two of blades. See
installation on page 35 for details.
A front-end director (FED) provide ports that support
connectivity to the open and mainframe systems belonging to
the customer. In addition, some of the FEDs support
virtualization of externally attached storage, remote replication
between the VSP G1000, VSP G1500, and VSP F1500 and other
storage systems, including communication between two Hitachi
storage systems in a Global Active Device cluster. See
director on page 32 for details.
The five exhaust fans on the rear of the controller pull hot air
away from the components and push it out the back of the rack.
These four slots on the controller support both front-end
directors and VSDs. Note that both FEDs and VSDs must be
installed in pairs.
Introduction
Description
*
Flexible front-end director
Front-end