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Knowledge Base

[T Series]A Solaris10U9forX86 Capacity Management Mechanism Defect Led to a Failure to Update LUN Capacities

Publication Date:  2012-07-19  |   Views:  491  |   Downloads:  0  |   Author:  q00002810  |   Document ID:  EKB1000008401


Issue Description

Product and version information:

  • S5500T V100R001 V100R002
  • S5600T V100R001 V100R002
  • S5800T V100R001 V100R002
  • S6800T V100R001 V100R002
  • Application server operating system: Solaris10U9 For X86

1.Connect the host to the storage array properly through a SAN network.
2.Log in to the storage array management system, create a LUN, and map it to the host. Log in to the host and scan for the mapped LUN, and then check the LUN status, quantity, and capacity information.
3.On the storage array management system, expand the LUN.
4.On the host, scan for the mapped LUN. The displayed capacity is different from the actual value even after the host is restarted.

Alarm Information


Handling Process

Log in to the storage array management system, delete the LUN expansion and restore the original LUN capacity.

Root Cause

Solaris10U9 For X86 considers disk information such capacities is permanent once the disk is created. This capacity management mechanism defect led to the problem.


Solaris10U9 For X86 considers capacity information to be unchanged once the disk is created; therefore, LUN expansion cannot function properly on Solaris10U9 For X86.

When tagging an untagged disk for the first time, Solaris10U9 For X86 stores its capacity information in its disk tag, and then writes the capacity information to the first sector. Solaris10U9 For X86 considers the disk capacity to be permanent once the disk is created.