Figure 93. Advanced Disk Folder Options
a. Select the Prepare Disk Folder for redundant storage checkbox.
b. Select a Tier Redundancy for each tier from the drop-down menus.
For spinning disks, the redundancy level for each tier defaults to either single redundant or dual
redundant depending upon the disks expected to be found in the tier. If a tier contains at least six
managed disks of which one is 900 GB or greater, then that tier and all tiers below it are set to
dual redundant storage by default. If a tier contains at least six managed disks of 1.8 TB or greater,
then that tier and all tiers below it are set to dual redundant storage and cannot be changed.
For Dell Enterprise Plus solid-state drives (SSDs), if a tier contains at least six managed disks of
which one is 1.6 TB, then that tier and all tiers below it are set to dual redundant storage by
default. If a tier contains at least six managed disks of 2.6 TB or greater, then that tier and all tiers
below it are set to dual redundant storage and cannot be changed.
• Single Redundant: Protects against the loss of any one drive
– RAID 10 (each disk is mirrored)
– RAID 5-5 (four data segments / one parity segment per stripe)
– RAID 5-9 (eight data segments / one parity segment per stripe)
• Dual Redundant: Protects against the loss of any two drives
– RAID 10 Dual Mirror (data is written simultaneously to three separate disks)
– RAID 6-6 (four data segments / two parity segments per stripe)
– RAID 6-10 (eight data segments / two parity segments per stripe)
c. Select a datapage size from the Datapage Size drop-down menu.
• 2 MB: (Default) Recommended for most application needs.
• 512 KB: Appropriate for applications with high performance needs (such as certain databases)
or environments in which Replays are taken frequently under heavy I/O. Selecting this size
reduces the amount of space the System Manager can present to servers.
Set up Storage Center Software
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