Hp 3Par Thin Conversion Software; Assessment; Data Preparation - HP 3PAR StoreServ 7200 2-node Manual

If the performance of one or more physical disks degrades, the throughput of the logical disks is
reduced and the entire system performance may decline. There are two general reasons why a
physical disk may have degraded performance:
The physical disk has reached its maximum throughput due to an unbalanced load. A disk in
this state typically has unusually high average service times when compared to other disks.
The physical disk is a bad disk. A bad disk typically has unusually high maximum service
times when compared to other disks.
System Tuner allows you to:
Perform physical disk performance tuning on an entire system 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 HP 3PAR Command Line Interface (CLI). Refer
to the HP 3PAR Command Line Interface Administrator's Manual for instructions on how to perform
these tasks.

HP 3PAR Thin Conversion Software

HP 3PAR Thin Conversion Software 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 convert volumes located on a system, you must have an F-Class,
T-Class, StoreServ 10000, or StoreServ 7000 Storage system 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.
Assessment
Before converting your volumes you must determine the benefits of the conversion process. The
potential benefits of zeroing free space prior to copying or migrating the data to a TPVV depends
on the amount of allocated but unused space. If there is relatively little unused space in the allocated
physical space then there is little benefit to zeroing the free space to recapture this relatively small
amount of space. Many volumes that have been in use for a long time have significant amounts
of allocated but unused space. If there is a large amount of unused space in the allocated physical
space then zeroing the data prior to copying the data results in a substantial reduction in the
amount of used space.
Data Preparation
Prepare your data for copying by removing unnecessary data. Perform clean-up tasks on the source
volume by:
Emptying trash cans or permanently deleting files.
Archiving unused files.
Shrinking databases.
Deleting temporary files.
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