Dot Hill Systems II 200 FC A.3 Agency Approvals and Standards, A.2.4 Firmware Redundant Loops

A.2.3 Firmware LUN Filtering (RAID-Based Mapping)

LUN filtering is a method used for separating and controlling access to data from the RAID controller. One major benefit of Fibre Channel is the capability to share a common storage pool with multiple servers or workstations. However, allocation becomes an issue when every server in a network can access the data in a logical drive. LUN filtering provides a means for controlling data access if data is not allowed for every server.

When you map a logical drive to a host LUN through the firmware application, you can create a mapping according to the worldwide port names (WWPN) that are specific to each host adapter. A LUN mask can then be created as an access filter for including or excluding host adapters from addressing specific storage unit. A host map is composed of an ID range that is configured to include one or more IDs. A host adapter can be identified by its ID (device-specific port names) as included or excluded from range. The LUN mask is also defined with a filter type as read only or read/write.

A.2.4 Firmware Redundant Loops

The selection of “drive-side dual-loop” is fixed. Since two channels are used to connect a group of physical drives, the two channels automatically assume the same ID address and operate in duplex mode.

A.2.5 Firmware Dynamic Load Balancing

The controller provides a mechanism to equally distribute I/O loads between channels in a redundant loop configuration.

A.3 Agency Approvals and Standards

Table A-3SANnet II 200 FC, SATA, and SATA SE Array Product Safety & Electromagnetic Standards

Product Safety	Standard
Country
U.S.	UL Listed to UL60950:2000, 3rd Edition
Canada	CSA Standard CAN/CSA-C22.2 No. 60950-00 3rd Edition
Germany	TÜV
European Union	EN 60950:2000
Japan	Part of World-wide CB Scheme

A-4SANnet II 200 FC, SATA, and SATA SE Array Installation, Operation, and Service Manual • March 2005