Hitachi Storage Navigator Modular 2 User Guide

Managing RAID Groups8–13
Hitachi Storage Navigator Modular 2 User’s Guide
Executing a RAID group spin-up or spin-down
Spinning down drives saves energy by spinning down the drive’s motor 
when the drive is idle. Navigator 2 lets you configure the drives in RAID 
groups to spin down automatically when idle. This feature is useful for 
organizations having a hard time meeting the demand for power in their 
data centers, either because power companies cannot generate sufficient 
power or the required...

8–14Managing RAID Groups
Hitachi Storage Navigator Modular 2 User’s Guide
4. Review the setting in the window and click Confirm to perform the spin 
up or spin down (or click Cancel to cancel the operation).
5. When the next window appears, click Close.
Changing RAID group expansion priority
Using the Change Priority button, you can change expansion priority for a 
selected RAID group between host access and RAID group access.
To change the RAID group expansion priority
1. In the left column of the RAID...

Managing RAID Groups8–15
Hitachi Storage Navigator Modular 2 User’s Guide
Filtering RAID groups
The RAID Groups tab provides a Filter button you can use to filter out RAID 
groups that do not meet certain criteria. This feature is particularly useful if 
you have a large number of RAID groups and only want to see a subset of 
them.
To filter RAID groups
1. In the RAID Groups tab in the Logical Units window, click the Filter 
button. The Array List Filter window appears (see Figure 8-10).
Figure 8-10:...

8–16Managing RAID Groups
Hitachi Storage Navigator Modular 2 User’s Guide
Deleting RAID groups
If you no longer need a RAID group, you can delete it from the RAID Groups 
tab. When you delete a RAID group, all logical units associated with the 
RAID group are also deleted.
To delete a RAID group
1. In the left column of the RAID Groups tab of the Logical Units window, 
click the checkbox of the RAID group you want to delete.
2. Click Delete RG. A confirmation window appears. 
3. In the confirmation...

Managing Logical Units9–1
Hitachi Storage Navigator Modular 2 User’s Guide
9
Managing Logical Units
This chapter describes how to perform logical unit tasks on 
Hitachi AMS 2000 Family storage systems using Navigator 2
The topics covered in this chapter are:
ˆOverview
ˆDisplaying the Logical Units window
ˆCreating a logical unit
ˆChanging LUN capacity
ˆDisplaying unified logical unit properties
ˆFormatting logical units
ˆFiltering logical units
ˆDeleting logical units 

9–2Managing Logical Units
Hitachi Storage Navigator Modular 2 User’s Guide
Overview
Logical units are user-designated partitions of the free storage space in a 
storage system and are used by a host to manage the data in the storage 
space they define. A logical unit can include all of the free storage space on 
a storage system or only part of it. 
For example, you can create a logical unit for the free space on each drive, 
or divide the free space on a drive into parts and create a logical unit for...

Managing Logical Units9–3
Hitachi Storage Navigator Modular 2 User’s Guide
Displaying the Logical Units window
All logical unit activities described in this chapter are performed from the 
Logical Units window. 
To display the Logical Units window
1. In the Arrays window, click the name of a storage system under the 
Array Name column in the Arrays window
2. In the center pane, click Groups > Logical Units. The Logical Units 
window appears.
3. In the Logical Units window, click the RAID Groups tab....

9–4Managing Logical Units
Hitachi Storage Navigator Modular 2 User’s Guide
Creating a logical unit
To create a logical unit
1. In the Logical Units tab, click Create LU. The Create Logical Unit window 
appears.
2. Click the Basic tab.
Figure 9-2:  Create Logical Unit Window (Basic Tab)
3. Complete the settings in the tab (see Table 9-3 on page 9-5).
4. To set advanced options, click the Advanced tab and complete the 
settings (see Figure 9-3 on page 9-5). If you do not need advanced 
settings, or if you...

Managing Logical Units9–5
Hitachi Storage Navigator Modular 2 User’s Guide
Figure 9-3:  Create Logical Unit Window (Advanced Tab)
5. Click OK. 
6. When the results window appears, click Close.
Table 9-3:  Create Logical Unit Window (Basic Tab)
FieldDescription
RAID Group Select a RAID group from the drop-down list.
LUN From 0 to the maximum supported by the storage system.
Capacity • For RAID groups: from 1MB/GB/TB/Block to max 
(depending on the amount of free space) Select ALL to 
assign the maximum...

9–6Managing Logical Units
Hitachi Storage Navigator Modular 2 User’s Guide
Changing LUN capacity
After you create a logical unit, you can e x p a n d  ( g r o w )  o r  r e d u c e  ( s h r i n k )  i t s  
size. You can also unify (concatenate) or separate logical units to increase 
capacity. You perform these tasks from the Change Logical Unit Capacity 
window.
Guidelines when expanding logical units
Observe the following guidelines when expanding or reducing logical units.
Expanding logical units
You...