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The lun size is smaller in format than it is with vol list on the T3. What happened to the extra space?

April 26, 2017extra format happened lun size smaller T3

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The lun size is smaller in format than it is with vol list on the T3. What happened to the extra space?

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A. Nothing. It’s a difference in the way they calculate the size. The T3 is using 1000 bytes per KB. Solaris is using 1024 bytes per KB (the true measurement). You’re not losing any actual capacity. The T3 is just making it look little bigger than it is. See p.2-34 of the T3 Installation, Operation, and Service Manual for an example and complete explanation. For the same reason, you should be aware that there will be a difference in the advertised capacity of the drive and what Solaris will see as useable capacity. See the question below regarding the T3’s drive capacity for further info. UPDATE: T3+ FW 2.01 has changed this behavior. With 2.01, the T3 volume capacity will actually match ‘format’. This can lead to some confusion after upgrading to 2.01 because ‘vol list’ will list “smaller” LUNs after the upgrade. See BugID 4521882 for details.