Ibm DS8000 Bedienungsanleitung PDF herunterladen (Seite 200)

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178 DS8000 Series: Concepts and Architecture

Figure 9-10 Sparing example 2: RAID-10 - All same capacity, same RPM

In Figure 9-10, four RAID-10 arrays are installed in a DA pair. Two arrays need two spare disk

drives (3x2+2S). One spare disk is in one loop and other spare disk is in the other loop in an

array. The other two arrays don’t need spare disks (4x2).

If you add other arrays configured with the same capacity and RPM as in this DA pair,

additional arrays don’t need spare disks (the arrays will be configured as RAID-5:7+P,

RAID-10:4x2).

Sparing Example 2 – RAID-10:

All same capacity, same RPM

• Assumes all devices same capacity & same RPM

• Minimum of 4 spares per DA pair

– 2 spares per loop & 2 spares in each array group

– Additional RAID-10 arrays will be 4x2

– Any additional RAID-5 arrays will 7 + P

• All spares available to all arrays on DA pair

…

3x2 + 2S

Array

4x2

Array

4x2

Array

3x2 + 2S

Array

1 2 ... 195 196 197 198 199 200 201 202 203 204 205 ... 449 450

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