3PAR InForm® OS 2.3.1 Concepts Guide (320-200112 Rev B, February 2010)

12.5
Thin Conversion
InForm OS Version 2.3.1 3PAR InForm OS Concepts Guide
■ The physical disk is a bad disk. A bad disk typically has unusually high maximum service
times when compared to other disks.
3PAR System Tuner allows you to:
■ Perform physical disk performance tuning on an entire InServ Storage Server or on a
specified subset of disks.
■ Set performance thresholds for physical disk tuning.
■ Identify and relocate under-performing chunklets.
System Tuner tasks can only be performed with the 3PAR InForm Command Line Interface (CLI).
Refer to the 3PAR InForm OS CLI Administrator’s Manual for instructions on how to perform
these tasks.
12.5 Thin Conversion
Thin Conversion is an optional feature that converts a fully-provisioned volume to a Thinly-
Provisioned Virtual Volume (TPVV). Virtual volumes with large amounts of allocated but
unused space are converted to TPVVs that are much smaller than the original volume. During
the conversion process, allocated but unused space is discarded and the result is a TPVV that
uses less space than the original volume. To covert volumes located on an InServ Storage
Server, you must have an InServ F-Class or T-Class Storage Server to perform the copy
operation.
The conversion process has four steps.
1 Assessment.
2 Data preparation.
3 Zeroing unused space.
4 Creating a physical copy.