HP XP7 User Manual

Causes and SolutionsProblems
Solutions:
• Add some pool-VOLs to the pool. See “Increasing pool capacity”
(page 146).
• Perform the operation to reclaim zero pages in order to release pages
in which zero data are stored. See “About releasing pages in a THP
V-VOL” (page 153).
• Adjust the value of Subscription Limit for the pool. See “Changing
the pool subscription limit” (page 141).
• Ask HP technical support to solve the problem.
Causes:Cannot add a pool-VOL.
• 1,024 pool-VOLs are already defined in the pool.
• The pool-VOL does not fill the requirements for a pool-VOL.
• Something in the storage system is blocked.
Solution:
• Change the setting of the LDEV to satisfy the requirement of the
Pool-VOL. See “Pool-VOL requirements” (page 63).
Causes:
• A failure occurred in data drives greater than the parity group
redundancy. The redundancy of the parity group depends on the
number of the blocked PDEVs (data drives). For example:
◦ When the parity group configuration is 3D+1P and failures occur
in two or more drives, the failures are considered to have occurred
in data drives beyond the parity group redundancy.
◦ When the parity group configuration is 6D+2P and failures occur
in three or more drives, the failures are considered to have
occurred in data drives beyond the parity group redundancy.
Solutions:
• Ask HP technical support to solve the problem.
A pool-VOL is blocked. SIM code 627XXX is
reported.
Solutions:
• Ask HP technical support to solve the problem.
A pool is blocked.
Causes:A pool cannot be restored.
• Processing takes time, because something in the storage system is
blocked.
• Usage of the pool has reached to 100%.
Solutions:
• After waiting for a while, refresh the display, and check the pool
status.
• Add some pool-VOLs to the pool to increase the capacity of the pool.
See “Increasing pool capacity” (page 146)).
• Perform the operation to reclaim zero pages in order to release pages
in which zero data are stored. See “About releasing pages in a THP
V-VOL” (page 153).
• Ask HP technical support to solve the problem.
Causes:A pool cannot be deleted.
• The pool usage is not 0.
• External volumes are removed from the pool before you delete the
pool.
• THP V-VOLs have not been deleted.
Troubleshooting Thin Provisioning 205

HP XP7 Specifications

General

Brand	HP
Model	XP7
Category	Storage
Language	English