A storage drive array with available storage space for user data with storage capacity in the array allocated to distributed spare space. The distributed spare space spreads portions of a spare drive across multiple storage drives in the array. By monitoring the amount of spare space available in the array, a determination may be whether the amount of spare space falls below a threshold number of drives. If there is un-used space in the available storage space which is greater than one drive of space, a drive of space to spare space may be dynamically re-allocated in a distributed pattern across the drives of the array.
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