Ibm System Storage Ds8000 Storage Tier Advisor Tool - IBM DS8800 Introduction And Planning Manual

Initiating volume migration
With Easy Tier, you can migrate volumes from one extent pool to another. The time
to complete the migration process might vary, depending on what I/O operations
are occurring on your storage unit.
If an error is detected during the migration process, the storage facility image (SFI)
retries the extent migration after a short time. If an extent cannot be successfully
migrated, the migration is stopped, and the configuration state of the logical
volume is set to migration error.
Pausing and resuming migration
You can pause volumes that were in the process of being migrated. You can also
resume the migration process on the volumes that were paused.
Canceling migration
You can cancel the migration of logical volumes that were in the process of being
migrated. The volume migration process pre-allocates all extents for the logical
volume when you initiate a volume migration. All pre-allocated extents on the
logical volume that have not migrated are released when you cancel a volume
migration. The state of the logical volumes changes to migration-canceled and the
target extent pool that you specify on a subsequent volume migration is limited to
either the source extent pool or target extent pool of the original volume migration.
Note: If you initiate a volume migration but the migration was queued and not in

IBM System Storage DS8000 Storage Tier Advisor Tool

The DS8000 offers a reporting tool called IBM System Storage DS8000 Storage Tier
Advisor Tool.
The Storage Tier Advisor Tool is a Windows application that provides a graphical
representation of performance data that is collected by Easy Tier over a 24-hour
operational cycle. It is the application that allows you to view the data when you
point your browser to the file. The Storage Tier Advisor Tool supports the
enhancements provided with Easy Tier, including support for SSD, SAS Enterprise,
and Nearline SAS for DS8800 and SSD, FC, and SATA for DS8700 and the auto
performance rebalance feature. Download the Storage Tier Advisor Tool for the
DS8700 at the DS8700 Storage Tier Advisory Tool program download page.
Download the Storage Tier Advisor Tool for the DS8800 at the Customer
Download Files Storage Tier Advisor Tool FTP page.
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Introduction and Planning Guide
Table 8. Volume states required for migration with Easy Tier (continued)
Volume state
Read only
Inaccessible
Indeterminate data loss
Extent fault
progress, then the cancel process returns the volume to normal state and not
migration-canceled.
Is migration allowed with Easy Tier?
Yes
No
No
No