Chapter 4: Subsystem Connection and Operation
o Concern: One major concern for this topology is to avoid ID conflicts on the host channels. When cascaded, logical drives from different RAID subsystems should be associated with different host channel IDs.
o Hub Disabled: When the onboard hub is disabled, SFP ports are specific to each RAID controller. If you connect application servers through FC switches, disable the onboard hub. Namely, the onboard hub should be disabled where FC port bypass can be provided externally.
•Pins #5 + 6: Currently the Fibre Channel device Auto- Negotiation does not work with all FC HBAs or switches. Please contact Galaxy tech support for certified equipment list for more information.
WARNING!
When the speed selection is manually switched for host channels to run at a 2G speed, subsystem firmware must also be adjusted accordingly. You may access the firmware using the LCD in front of the subsystem, RS- 232C hyper terminal screen, telnet and RAIDWatch management software. If the Fibre port speed options are not coordinated with the firmware, the data transfer rate may eventually slow down and cause system error.
Make sure the Channel bus Data Rate setting in firmware is consistent with your DIP switch selection. The firmware configuration options can be found in Main Menu, “View and Edit Channels,” “Data Rate.” Changing the configuration requires resetting the subsystem.
Subsystem Connection and Operation |
