Hp XP P9500 Storage Bedienungsanleitung PDF herunterladen (Seite 25)

5. Configure port parameters for the primary and secondary systems in the External Path Groups

tab in Remote Web Console. For the details of the External Path Groups tab, see the HP P9000

External Storage for Open and Mainframe Systems User Guide. Use the following values,

which are also recommended for port parameters on the quorum disk's external storage system.

• QDepth: This is the number of Read/Write commands that can be issued (queued) to the

quorum disk at a time.

The default is 8.

• I/O TOV: This is the timeout value to the quorum disk from the primary and secondary

systems. The value must be less than the time-over value from the application.

Recommended: 15 seconds; Default: 15 seconds.

• Path Blockade Watch: This is the time that you want the system to wait after the quorum

disk paths are disconnected before the quorum disk is blocked.

Recommended: 10 seconds; Default: 10 seconds.

Adding a quorum disk ID

You add a quorum disk ID to a mapped quorum disk so that it can be recognized by the primary

and secondary systems.

Prerequisite information:

• Perform this operation on both the primary and secondary systems.

• Use the same quorum disk ID for both the primary and the secondary system.

• Data in the external volume that you assign as a quorum disk is deleted. Make sure the LDEV

number you assign is the one you set up for the quorum disk.

• Confirm the following:

That the primary and secondary systems are configured for ESAM. This operation must

be performed from both systems. See “Configuring primary and secondary systems ”

(page 23).

◦

◦ A volume on the external storage system has been mapped to be used as a quorum disk.

◦ The mapped quorum disk volume and its external storage system meet the requirements

described in “Quorum disk requirements ” (page 14).

Procedure 7 To add a quorum disk ID:

1. Access the MCU or RCU in Remote Web Console, then click Actions > Remote Copy >

Continuous Access Synchronous > Quorum Disk Operation.

2. Make sure that you are in the modify mode.

3. In the Quorum Disk Operation window, right-click the quorum disk ID that you want to add,

then click Add Quorum Disk ID. The Add Quorum Disk ID dialog box displays.

4. From the Quorum Disk drop-down menu, select the LDKC:CU:LDEV number that you specified

when mapping the external volume. This is the volume that will be used for the quorum disk.

5. From the RCU drop-down menu, select the CU that is to be paired with the CU on the current

storage system. The list displays the RCU serial number, LDKC number, controller ID, and

model name registered in CU Free.

6. Click Set. The settings are displayed in the Preview area.

7. Verify your settings. To make a correction, select the setting, right-click, and click Modify. To

save the changes, click Apply.

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