HP EVA3000 User Manual download pdf (Page 40)

• The disk drives should be distributed evenly across the disk enclosures. The number of disks of

a given type in each enclosure should not differ by more than one. For example, no enclosure

should have seven disks until all the other enclosures have at least six. A m i nimum of four disks

are required to be p o p ulated in every disk enclosure.

• Disk drives should be installed in vertical columns within the disk enclosures. Add drives vertically

in multiples of eight, completely ﬁlling columns if possible. Disk groups are more robust if ﬁlled

with the same number of disk drives in each enclosure. See Figure 6 for an example.

NOTE:

When add ing multiple disk drives, add a disk and wait for its activity indicator (1) to stop ﬂashing

(up to 90 seconds) before installing the next disk (see Figure 5). This procedure must be followed to

avoidunexpectedEVAsystembehavior.

Figure 5 Disk drive activity indicator

Creating disk groups

The new disks you add will typically be used to create new disk groups. Although you cannot select

which disks will be part of a disk g roup, you can control this by building the disk groups sequentially.

Add the disk drives required for the ﬁrst disk group, and then create a disk g roup using these disk drives.

Now add the disk drives for the second disk group, and then create that disk group. This process gives

you control over which disk drives are included in each disk group. Figure 6 shows the sequential

building of vertical disk groups.

NOTE:

Standard and FATA disk drives must be in separate disk groups. Disk drives of different capacities and

spindle speeds can be included in the same disk group, but you may want to consider separating

them into separate disk groups.

Enterprise Virtual Array operation

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HP EVA3000 User Manual Page 40