IBM DS6000 Manuale Utente Scaricare il pdf (Pagina 166)

100

101

142 DS6000 Series: Concepts and Architecture

See Figure 8-10 and Figure 8-11 on page 143. These figures are simple examples for 64

DDM configurations with RAID 5 or RAID 10 arrays.

RAID arrays are configured with spare disks in the server enclosure and the first expansion

enclosure (each enclosure has two spare disks). Expansion enclosures 2 and 3 don’t have

spare disks.

Figure 8-10 Sparing example 1 (RAID-5)

Sparing Example 1 – RAID 5:

All same capacity, same rpm

• Assumes all devices same capacity & same rpm

• On a DS6800 will have up to two spares on each loop

– Additional RAID arrays will have no spares (RAID 5: 7+P, RAID 10: 4

x 2)

• All spares available to all arrays on the fabric

6 + P

7 + P

6 + P

7 + P

…

Server Enclosure

6 + P

7 + P

6 + P

7 + P

…

Exp Enclosure 1

Exp Enclosure 3

Exp Enclosure 2

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IBM DS6000 Manuale Utente Pagina 166

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