Texas Memory Systems RamSan-300/320 LUN Configuration, Gigabytes System Memory, Fibre Channel

Chapter 6 – LUN Configuration

The extremely versatile RamSan-3xx series supports a variety of configurations and access control methods. LUN configuration is a memory-partitioning tool that allows the administrator to configure system memory into LUNs (Logical Unit Numbers) that may be assigned to specific Fibre Channel ports in the RamSan. In addition, the administrator can assign LUN specific backup modes (for the RamSan-320) and assign the LUNs’ access lists, which mask the visibility to specific servers.

The factory default configuration assumes no access control and equal shares of system memory for each Fibre Channel port. For example, if you have a 16 Gigabyte system with two Fibre Channel ports, each port has access to only half of the system memory. Host computers attached to the same network as the RamSan see two eight-Gigabyte drives.

16 Gigabytes	8 Gigabytes	8 Gigabytes
System
Memory	LUN 0	LUN 1
Fibre Channel	FC Port	FC Port
Controller

Figure 6-1: RamSan Default LUN Configuration

You can change each Fibre Channel ports allocated space by using a simple configuration utility that TMS provides in the Text Management Interface and Web Interface.

Important:

LUN changes are not effective until the changes are saved.

RamSan-300/320 User’s Manual - 52 -