Dell Compellent Series 30 - Manual (Page 392)

384 Storage Center 5.5 System Manager User Guide
Storage Profiles
Storage Profiles Created by the System
If Data Progression is licensed, cost and performance are optimized when all volumes use
the default Recommended Storage Profile. If Data Progression is not licensed, the default
Storage Profile is High Priority, which stores data on Tier 1. When Tier 1 is full, data is then
stored on the next lower available tier. Without Data Progression, you must configure
volumes to use a specific tier of storage. Data will not migrate between tiers.
• To view a list of profiles, expand the Storage Profiles icon.
• To view Storage Profile properties from the list of Storage Profiles, select a profile.
If your user volume defaults allow you to choose a Storage Profile, the System Manager
displays default profiles in the system tree under Storage:
• Recommended (All Tiers)
The Recommended Profile is available only when Data Progression is licensed. To
optimize Data Progression and performance on the Storage Center, create volumes
with the Recommended Storage Profile. The Recommended profile allows the system
to automatically progress data between and across all storage tiers based on data type
and usage.
• High Priority (Tier 1)
The High Priority Storage Profile provides the highest performance. High Priority limits
the data stored on the highest tier of disks. It is efficient in terms of using RAID 5 or 6,
but it uses more expensive media to store the data.
Creating a volume using the High Priority Storage Profile stores written data on Tier 1,
RAID 10 (mirrored drives). Replay data is stored on Tier 1, RAID 5/RAID 6. Storage
Center does not migrate data to lower storage tiers unless Tier 1 storage becomes full.
• Medium Priority (Tier 2)
The Medium Priority Storage Profile provides a balance between performance and cost
efficiency.
Creating a volume using the Medium Priority Storage Profile stores written data on RAID
10, Tier 2. Replay data is stored on RAID 5/RAID 6, Tier 2. Storage Center does not
migrate data to other storage tiers unless Tier 2 storage becomes full.
Note Make sure you have drives actually populating Tier 2 before you create a volume
using the Medium Priority Profile.
• Low Priority (Tier 3)
The Low Priority Storage Profile provides the most-cost efficient storage. Creating a
volume using the Low Priority Storage Profile stores written data on RAID 10, Tier 3.
Replay data is stored on RAID 5/6, Tier 3. Storage Center does not migrate data to
higher tiers of storage unless Tier 3 storage becomes full.
Note Make sure you have drives actually populating Tier 3 before you create a volume
using the Low Priority Profile.