IBM DS3500 - Page 254

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230 IBM System Storage DS3500: Introduction and Implementation Guide
This action starts the wizard for creating the array. The first window of the wizard is an
introduction to the process. It displays the available unconfigured capacity. Read the
introduction and then click Next in order to proceed.
2. In the Create Array window, type a meaningful array name that describes your set of disks,
and then select either Automatic mode or Manual mode. Automatic mode is the default
and recommended option, as shown in Figure 9-6. By selecting the Automatic option, the
Storage Manager software selects a combination of available drives to optimize
performance and availability, and attempts to select physical drives from different
enclosures in order to provide enclosure protection whenever possible. If some SED disk
drives are used in DS3500 you can see also the check box for selecting the encrypted
disks for Array creation. For more information about disk encryption, refer to Chapter 15,
“Disk Security with Full Disk Encryption drives” on page 449.
Figure 9-6 Create Array and assign a name and mode
The Automatic (Recommended) creation of the array selects the drives in the following
order:
– Same capacity-same speed enclosure redundancy
– Same capacity-mixed speed enclosure redundancy
– Same capacity-same speed no enclosure redundancy
– Same capacity-mixed speed no enclosure redundancy
– Mixed capacity-same or mixed speed-no enclosure redundancy
In the Manual (Advanced) mode, you have to select all the drives individually. Make sure
that you select them to maximize performance and availability.
Another way for manual selection is possible from the Physical tab. You can select multiple
unconfigured disk drives in Physical pane using the Ctrl key, before choosing option for
create a new array. If you right click on one of preselected disks, and select Create Array
menu item, the same initiation window will open, as in Figure 9-6. In this window you can
see, manual mode is preselected. With this manual mode, follow the instructions in this
chapter, and when you reach the window for disk drives selection, you will recognize, your
planned disks are already selected for new Array.
3. Click Next in order to select the RAID level.
– Select the desired RAID level. The window (Figure 9-7 on page 231) now displays the
different capacity options depending on the unconfigured drives available in your
subsystem. If you have different disk sizes, you have more than one option for the
same number of disks. See Chapter 3, “IBM System Storage DS3500 Storage System