The maximum LUN (Logical Unit Number) size in Windows depends on the underlying storage system and its configuration. Therefore, there isn't a single definitive answer. However, here's a breakdown based on the provided context and common scenarios:
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ONTAP (NetApp) Considerations:
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ONTAP 9.4 and earlier: The LUN could be grown to approximately 10 times its original size, but not exceeding 16 TB.
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ONTAP 9.5: The LUN could be grown up to 16 TB, regardless of its original size.
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ONTAP 9.8 and later: The LUN could be grown to 128 TB in ASA (All SAN Array) configurations.
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It's crucial to understand that the maximum LUN size is also influenced by:
- The file system: NTFS has practical limitations that can affect usable space.
- Hardware limitations: Older systems may have inherent size restrictions.
- Operating system limitations: While Windows typically supports large LUNs, legacy versions might have limitations.
- Storage array configuration: Storage arrays have their own maximum LUN size capabilities.
Therefore, while the theoretical maximum LUN size can be 128 TB in certain configurations with ONTAP 9.8 and later, the actual usable size can be affected by these other factors. Always refer to the documentation for your specific storage array and Windows version for the most accurate information.
