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Dell EMC PowerVault MD 34XX/38XX Series Storage Arrays Administrator's Guide

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Thin virtual disks

When creating virtual disks from a disk pool, you have the option to create thin virtual disks instead of standard virtual disks. Thin virtual disks are created with physical (or preferred) and virtual capacity, allowing flexibility to meet increasing capacity requirements.

When you create standard virtual disks, you allocate all available storage based on an estimation of how much space you need for application data and performance. If you want to expand the size of a standard virtual disk in the future, you must add physical disks to your existing disk groups or disk pools. Thin virtual disks allow you to create large virtual disks with smaller physical storage allocations that can be increased as required.
NOTE: Thin virtual disks can only be created from an existing disk pool.
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