User guide

15Fabric OS 4.4.x release notes
Table 3 Core Switch 2/64 Information
Core Switch 2/64 Description
Power supplies
Customers reconfiguring SAN Director 2/128-only configurations by
adding Core Switch 2/64 blade(s) will have to ensure that all three power
supply FRUs are installed, as Core Switch 2/64 blades have greater power
requirement
Table 4 Fabric OS area information
Fabric OS Area Description
Compatibility
Sometimes in a mixed fabric of Fabric OS v4.x/v3.x/v2.x, fabric
reconfiguration is caused by link reset on v3.x/v2.x. This only happens in
a fabric containing Fabric OS v3.x versions released prior to v3.1.0 or
Fabric OS v2.x versions released prior to v2.6.1 that are under heavy
traffic or CPU-intensive operations such as large (50 KB) zone database
propagation. Use the latest revision of code across all releases in a mixed
fabric.
Firmware download During a firmware download, rebooting or power cycling the CPs could
corrupt the compact flash.
CAUTION: Do not attempt to power off the CP board during firmware
download, to avoid high risk of corrupting your flash.
Firmware download Fabric OS v4.1.x, v4.2.x, and v4.4.x non-disruptive firmware download
allows for firmware downgrades and upgrades; however, you might see
warning messages such as the following:
0x239 (fabos): Switch: 0, Info PDM-NOTFOUND, 4, File not found
(/etc/fabos/mii.0.cfg)
These warnings can be ignored.
Firmware download, boot
ROM
The boot ROM in Fabric OS v4.4 is automatically upgraded, by firmware
download, to version 4.5.0 in all v4.x switches. After it has upgraded, the boot
ROM will not downgrade should a firmware downgrade be performed.