Release Note для Spectra Logic spectra t120

Working with Hardware Components

25

Spectra Logic recommends using quad-rate SFPs with all E-QIPs and F-QIPs. These can 
be ordered directly from Spectra Logic (PN 7964).

The only quad-rate SFP manufacturers certified by Spectra Logic are:

ƒ PicoLight (Vendor PN PLR-XPL-VE-SG4-62-N)
ƒ JDSU (Vendor PN JSH-42S3AB3)

Copper RJ-45 SFPs are supported on the G3 E-QIP. Copper SFPs are designed for use 
with Gigabit Ethernet connections only and are not for use with Fibre Channel 
connections. These can be ordered directly from Spectra Logic (PN 7387).

The only Copper SFP manufacturers certified by Spectra Logic are:

ƒ 3COM (Vendor PN 3CSFP93)
ƒ Agilent (Vendor PN HBCU-5710R)

The minimum cable requirements when using the copper SFPs is CAT5e. CAT6 cable is 
highly recommended for distances greater than 10 feet.

Note on Copper SFPs. There is currently an issue with the way copper SFPs report link 
status. A copper SFP reports a link-up status as soon as it is plugged into a QIP, 
whether or not an RJ-45 cable is plugged into it or there is actually a link to the 
network. Since there is no way for the QIP to detect a link-down status, there are 
potential problems when the link status changes, such as when a system reboots or 
when the cable is connected to or disconnected from a network. There are also 
potential problems of missed, dropped, or fragmented iSCSI packets when the link 
status changes.

To work around this problem, physically unplug the SFP from the QIP and plug it back 
in whenever a link status changes, including when a system reboots and any time the 
RJ-45 connecting the QIP and to the network is unplugged. Physically unplugging the 
SFP from the QIP and plugging it back in causes a link status change that the QIP can 
detect.