Hitachi G1500 - Page 37

The front-end director connects the storage system to the host servers, processes
channel commands fr
om hosts, manages host access to the cache, and contr
ols the
tr
ansfer of data between the hosts and the contr
oller cache.
The following FEDs are available:
■
iSCSI
■
Fibre Channel
■
FICON (shortwave and longwave)
■
Fibre Channel over Ethernet (FCoE)
The Fibre Channel FED can be congured with either shortwave or longwave host
connectors. The FICON is congured with either longwave or shortwave connectors that
match the wavelength of the mainframe ports.
The following gure shows the port LEDs of a FED, and the following table lists the
description of the port LEDs.
Figure 4 Front-end director blade, Fibre Channel and iSCSI
Item Name Color Description
1 Blade
Status
Dark (o)
Red (on)
OFF: Power is not supplied to the system. The system is not
oper
ational.
ON: Boar
d failur
e. The blade can be r
eplaced while the system is
running.
2 Power
supply
Status
Dark (o)
Amber (on)
OFF: Power is not supplied to the system or, if power is supplied to
the system, power supply in this blade is operational.
ON: Power supply failure, abnormal voltage in power supply.
3 Port
Status
(FC/
iSCSI)
Dark (o)
Green (on)
OFF: If system power is o, the port is not ready.
OFF: If system power is on, the port is ready.
ON: Link is active.
Front-end directors
Chapter 2: Storage system hardware overview
Hitachi Virtual Storage Platform G1000, G1500, and VSP F1500 Hardware Guide 37