D-MSS-DS-23: Midrange Storage Solutions Design

By Dell · Question Mode

QuestionQ7

Dell Midrange Storage Solutions Planning, Sizing and Design

A systems administrator deployed a Dell Unity XT 380F system with 15 × 1.92 TB SSD drives in a RAID 5 dynamic pool. Soon after deployment, the administrator wants to expand system capacity and use larger drives to increase density.

What occurs if the administrator adds 4 × 3.84 TB SSD drives?

Explanation

Dell Unity dynamic pools support mixing drive capacities of the same type. However, the entire capacity of larger drives is available only when the number of drives of that larger capacity meets or exceeds the RAID stripe width plus one drive. With RAID 5 4+1, four larger SSDs do not meet that threshold for their additional capacity, so only 1.92 TB from each 3.84 TB SSD is available.

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