Galaxy Metal Gear 65 manual Controlling Partition Access, To enable or disable write-back cache

Galaxy 65 User Guide

To enable or disable write-back cache:

1Display the partition menu.

From the Array Menu		From the All Partitions Menu
1	From the System Menu, select Array	1 From the System Menu, select All
	Menu and press Enter.	Partitions Menu and press Enter.
	The Select Array screen displays with a list	The Select Partition or Free Area
	of existing arrays.	screen displays with a list of
2	Select the array you want and press Enter.	existing partitions and free space.
	The array menu displays.	2 Select the partition you want and
3	Select Partition Menu and press Enter.	press Enter.
	The Select Partition screen displays with a	The partition menu displays.
	list of existing partitions for the current
	array.

4Select the partition you want and press Enter.

The partition menu displays.

2Select Change Cache Params and press Enter. Change Cache Params screen displays.

3Select Write-back Cache and press Enter

The Write-back Cache screen displays. The current option has an * next to it.

4Select the option you want for this partition and press Enter.

C.3.8 Controlling Partition Access

The Galaxy 65 Subsystem’s InfoShield capability lets you specify which hosts can access each partition. This gives you complete control of array access based on your specific needs.

Before you set up InfoShield, you should know the World Wide Name (WWN) for each host that you want to set up. Your SAN administrator should know the WWNs for your network. You can display a list of the last 16 WWNs that the Galaxy 65 Subsystem is aware of on the SAN, and you can give each WWN a nickname of your own. This makes working with the InfoShield feature faster and easier.

You set up InfoShield by either excluding or including hosts on a list for each partition LUN. The list can include or exclude up to 16 specific hosts or all hosts for each partition LUN.

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