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LUN size

You specify the size of a LUN in bytes or by using specific multiplier suffixes.

Multiplier suffixes that can be used are:

Multiplier suffix Size
c bytes
w words or double bytes
b 512-byte blocks
k kilobytes
m megabytes
g gigabytes
t terabytes

The usable space in the LUN depends on host or application requirements for overhead. For example, partition tables and metadata on the host file system reduce the usable space for applications. In general, when you format and partition LUNs as a disk on a host, the actual usable space on the disk depends on the overhead required by the host.

The disk geometry used by the operating system determines the minimum and maximum size values of LUNs. For information about the maximum sizes for LUNs and disk geometry, see the vendor documentation for your host OS. If you are using third-party volume management software on your host, you should consult the vendor’s documentation for more information about how disk geometry affects LUN size.