In Huawei Oceanstor V3 storage system, if a hard disk domain performance layer has 50 pieces of SAS hard disk with same parameters, and hot standby strategy is high, then how many pieces of SAS hard disk capacity does the system will reserve for that layer to do hot standby space ?

In Huawei Oceanstor V3 storage system, if a hard disk domain performance layer has 50 pieces of SAS hard disk with same parameters, and hot standby strategy is high, then how many pieces of SAS hard disk capacity does the system will reserve for that layer to do hot standby space ?
A . 2 pieces of hard disk
B . 3 pieces of hard disk
C . 4 pieces of hard disk
D . 5 pieces of hard disk

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Answer: C