SCv3000 and SCv3020 Storage System Deployment Guide

Create a Storage Type

Select the datapage size and redundancy level for the Storage Center.

1. Select a datapage size.
   • Standard (2 MB Datapage Size): Default datapage size, this selection is appropriate for most applications.
   • High Performance (512 KB Datapage Size): Appropriate for applications with high performance needs, or in environments in which snapshots are taken frequently under heavy I/O. Selecting this size increases overhead and reduces the maximum available space in the Storage Type. All-flash storage systems use 512 KB by default.
   • High Density (4 MB Datapage Size): Appropriate for systems that use a large amount of disk space and take snapshots infrequently.
2. Select a redundancy type.
   • Redundant: Protects against the loss of any one drive (if single redundant) or any two drives (if dual redundant).
   • Non-Redundant: Uses RAID 0 in all classes, in all tiers. Data is striped but provides no redundancy. If one drive fails, all data is lost.

     NOTE: Non-Redundant is not recommended because data is not protected against a drive failure. Do not use non-redundant storage for a volume unless the data has been backed up elsewhere.

3. For Redundant Storage Types, you must select a redundancy level for each tier unless the drive type or size requires a specific redundancy level
   • Single Redundant: Single-redundant tiers can contain any of the following types of RAID storage:
     • RAID 10 (each drive is mirrored)
     • RAID 5-5 (striped across 5 drives)
     • RAID 5-9 (striped across 9 drives)

   • Dual redundant: Dual redundant is the recommended redundancy level for all tiers. It is enforced for 3 TB HDDs and higher and for 18 TB SSDs and higher. Dual-redundant tiers can contain any of the following types of RAID storage:
     • RAID 10 Dual-Mirror (data is written simultaneously to three separate drives)
     • RAID 6-6 (4 data segments, 2 parity segments for each stripe)
     • RAID 6-10 (8 data segments, 2 parity segments for each stripe.)
4. Drive Addition is selected by default. Leave this option selected.
5. Click Next.