Administrator Guide

Name Initial Write Tier Tier (T) and RAID Levels Progression
Write Intensive (Tier 1) 1 Writes: T1 RAID 10 snapshots:
T1 RAID 10
No
Flash Only with Progression
(Tier 1 to Tier 2)
1 Writes: T1 RAID 10 snapshots:
T2 RAID 5
Yes to Tier 2 only
Low Priority with Progression
(Tier 3 to Tier 2)
3 Writes: T3 RAID 10 snapshots:
T3 RAID 5/6 or T2 RAID 5
Yes to Tier 2 only
Low Priority (Tier 3)
The Low Priority profile provides the most cost efficient storage. Creating a volume using the Low Priority profile stores written
data on Tier 3 RAID 10. Snapshot data is stored on Tier 3 RAID 5/6. Storage Center does not migrate data to higher tiers of
storage unless Tier 3 storage becomes full.
Flash-Optimized with Progression (Tier 1 to All Tiers)
The Flash Optimized with Progression storage profile provides the most efficient storage for an enclosure containing both
read-intensive and write-intensive SSDs. When a storage type uses this profile, all new data is written to write-intensive Tier 1
drives. Snapshot data is moved to Tier 2, and less-active data progresses to Tier 3.
If Tier 1 fills to within 95% of capacity, Storage Center creates a space-management snapshot and moves it immediately to Tier
2 to free up space on Tier 1. The space-management snapshot is moved immediately and does not wait for a scheduled data
progression. Space-management snapshots are marked as Created On Demand and cannot be modified manually or used
to create View volumes. Space-management snapshots coalesce into the next scheduled or manual snapshot. Storage Center
creates only one on demand snapshot per volume at a time.
Write-Intensive (Tier 1)
The Write-Intensive storage profile directs all initial writes to write-intensive SSDs on Tier 1 (RAID 10). The data does not
progress to any other tier. This profile is useful for storing transaction logs and temporary database files.
Flash Only with Progression (Tier 1 to Tier 2)
The Flash Only with Progression storage profile performs initial writes on high-performance Tier 1 drives. Less active data
progresses to Tier 2, but remains on SSDs. This profile is useful for storing volumes with data that requires optimal read
performance, such as golden images, linked clones, and some databases.
Low Priority with Progression (Tier 3 to Tier 2)
The Low Priority with Progression storage profile directs initial writes to less expensive Tier 3 (RAID 10) drives, and then allows
frequently accessed data to progress to Tier 2. This profile is useful for migrating large amounts of data to Storage Center
without overloading Tier 1 SSDs.
Storage Virtualization for SCv2000 Series Storage Systems
SCv2000 series storage systems automatically manage many of the storage virtualization options.
Disk Management on SCv2000 Series Storage Systems
SCv2000 series storage systems manage disks automatically, limiting the disk management options. After adding disks, Storage
Center recognizes the new disks, creates a new disk folder if necessary, then manages the disks in the disk folder. If a disk is
intentionally down for testing purposes, then is deleted, you can restore the disk to manage the disk again in a disk folder.
The following disk management options are not available for SCv2000 series storage systems:
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Storage Center Overview