How many disks can RAID 5 support?
With a RAID 5 configuration, you can connect three to 16 drives, but four is the most common number of hard drives used in this array. Even though the minimum drives for RAID 5 is three, most users opt for four drives because of speed, fault tolerance and storage capacity.
Why does RAID 5 need 3 disks?
RAID 5 uses at least three hard drives and strips data across multiple hard drives to improve performance through simultaneous access, but unlike RAID 0, RAID 5 includes correction codes (parity bits) between the data.
What is the minimum disk for RAID 5?
RAID 5 groups have a minimum of three hard disk drives (HDDs) and no maximum. Because the parity data is spread across all drives, RAID 5 is considered one of the most secure RAID configurations.
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[PDF] Some Results of Measurement Server DISK I/O Performance
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[PDF] Disk management - IBM i
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