APC 15000 RAID manual Security Administration, Host Command Timeout

NOTE : Improper use of the SES M_WAIT command can prevent the SES monitors from detecting an enclosure fault before the enclosure automatically shuts down.

3.3.4.5Host Command Timeout

The Host Command Timeout parameter allows the system to free up resources and make them available to other users if the request from a particular user cannot be completed. This helps to improve performance in a SAN environment where there are a lot of users accessing the storage.

HOST TIMEOUT=X (where X is value range 1..512) lets the host command timeout for an I/O request in seconds. Valid range is 1 to 512 seconds. Default setting is 75 seconds.

3.4 Security Administration

The controller’s dual-level, non-host based data security is maintained with scalable features including restricted management access and authentication against authorized listing. No security software is required on the host computers. (Refer to Section 3.1.3,"Administrator and User Logins" for information regarding Telnet and serial port security.)

Each authorized user will have its customized LUN identification scheme which applies to all host ports (Figure 3–46).

	Internal	1	2	3	4	5 6 7
	LUN Map 0
WWN 1							LUN 0	LUN 5
	WWN 1
								LUN 4
	External	1	2	3	4
	LUN Map 0						LUN 3
							LUN 2	LUN 1

Figure 3–46Mapping Internal LUNs to External LUNs

Read-only and read/write privileges can be specified for each LUN and for each user.

The “place holder” LUN feature allows the controller administrator to map a zero capacity LUN to a host or group of hosts (via zoning or user authentication). The administrator can then create a real LUN and map it to the host(s) to replace the “place holder” LUN in the future. In most cases, the host will not have to reboot since it already mapped to the “place holder” LUN.

NOTE : Support of place holder LUNs is dependent upon the operating system, the driver, Host Card Adapter (HCA), and host bus adapter.

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