A customer has a VNX system that uses only RAID 5 configured as 4+1 groups. The VNX model
supports a maximum of 250 drives. They intend to use Clones for local replication and backups.
What is the size of the largest Pool they can create?
A.
240 drives
B.
241 drives
C.
246 drives
D.
250 drives
Could anyone further explain this ? I cannot find anything in the student guide or elsewhere.
Thanks in advance,
g.
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My thoughts:
According to best phactice we need 1 spare drive per 30 production drives.
So 250/30=8.3 HDDs (9).
250-9 = 241 HDD. But customer use raid5 (4+1) With such raid we can use unly 240 drives, not 241.
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and what about the vault drives?
btw thank you alexey for all your comments. they are very helpful!
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250 -4 = 246
246 / 30 = 8,2 spares
240 for pool, 4 value, and 6 spares (1 hsp no good)
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sorry, vault
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