Hp XP P9500 Storage Manuel d'utilisateur télécharger pdf (Page 103)

Changing THP V-VOL settings

Before registering a THP V-VOL, you may need to change the THP V-VOL settings.

1. In the Selected LDEVs table in the Create LDEVs window, select an LDEV, and then click Change

LDEV Settings.

2. In the Change LDEV Settings window, you can change the setting of LDEV Name, Initial LDEV

ID, or Processor Blade.

• If you change LDEV Name, specify the prefix characters and the initial number for this

LDEV.

• If you change Initial LDEV ID, specify the number of LDKC, CU, DEV, and Interval. To

check used LDEVs, click View LDEV IDs to confirm the used LDEVs. The View LDEV IDs

window opens.

• If you change Processor Blade, click the list and specify the processor blade ID. If the

specific processor blade is specified, select the processor blade ID. If any processor blade

is specified, click Auto.

3. Change the settings, and then click OK.

4. In the Create LDEVs window, click Finish.

5. In the Confirm window, click Apply.

The setting is changed.

If Go to tasks window for status is checked, the Tasks window opens.

Removing the THP V-VOL to be registered

If you do not want to register the THP V-VOL, you can remove it from the registering task.

1. In the Selected LDEVs table in the Create LDEVs window, select the LDEV, and then click Remove.

2. Click Finish.

3. In the Confirm window, click Apply.

The LDEV is removed.

If Go to tasks window for status is checked, the Tasks window opens.

Formatting LDEVs in a Windows environment

In a Windows environment, both Normal Format or Quick Format are commonly used. In this

environment, Quick Format consumes less thin provisioning pool capacities than Normal Format.

On Windows Server 2008, using Normal Format issues Write commands to the overall volume

(for example, overall “D” drive). When Write commands are issued, pages corresponding to the

overall volume are allocated, therefore, pool capacities corresponding to the ones of the overall

volume are consumed. In this case, the thin provisioning advantage of reducing capacities is lost.

Quick Format issues Write commands to only management information (for example, index

information). Therefore, pages corresponding to management information areas are allocated,

but the capacities are smaller than the ones consumed by Normal Format.

More capacity may be consumed with file updates. When a file is updated, it may not be written

to the original blocks. The file might first be deleted, then written to different blocks. In this case,

new blocks are consumed and additional pages are allocated to those blocks. This increases pool

usage and decreases the effectiveness of reducing pool capacity consumption.

Monitoring capacity and performance

Monitoring pool capacity

The storage system monitors the pool’s free capacity in accordance with threshold values defined

when you create pools. If the pool capacity reaches the threshold values, warnings are issued as

Monitoring capacity and performance 103

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Hp XP P9500 Storage Manuel d'utilisateur Page 103

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