White Papers
Table Of Contents
- 1 Introduction to member RAID policies
- 2 RAID policy availability and performance comparisons
- 3 Setting the member RAID policy
- 4 Displaying the RAID level space distribution
- 5 PS Series array disk layout
- 6 Converting or migrating from a member RAID policy
- 7 Summary
- A 12-Disk PS Series array RAID configurations
- B 14-Disk PS Series array RAID configurations
- C 16-Disk PS Series array RAID configurations
- D 48-Disk PS Series array RAID configurations
- E 42 or 84-disk PS Series RAID configurations
- F Technical support and resources
14 Dell PS Series Storage: Choosing a Member RAID Policy | TR1020 | v 4.7
Surviving disk failures with RAID 6 as the member RAID level
Example of RAID 6 surviving a double disk failure in each RAID set
2.4.2 RAID 10
The following figures show how using RAID 10 can increase (but cannot guarantee) the chance that an array
can survive multiple disk failures in a 24-disk, PS6210 Series array. RAID 10 can survive only one
simultaneous disk failure per RAID 1 mirror but allows multiple disk failures in a single array as long as the
failed disks fall in different mirrored sets. This RAID level is appropriate for mission critical data with high write
intensive random I/O requirements.
Figure 7 represents a RAID 10 configuration protected by RAID and two spare disks. In the event of a disk
failure, the spare disks automatically replace the failed disks. After reconstruction, data is again protected by
RAID.
Note: RAID 10 is not recommended for HDD or SSD larger than 6 TB.