Netgear RD5D (ReadyDATA Disk Packs) – ReadyDATA Disk Packs (SATA/NL-SAS/SAS/SSD) Quick Setup Guide
Optimize Performance on a ReadyDATA System
8
Volume Performance and Configuration on ReadyDATA Platforms
RAID Types
The selection of the RAID type and the types of HDDs determine the performance of the
volume.
volume.
The following table compares RAID types and performance when all volumes have the same
types of HDDs (except for the hybrid volume, which also includes SSD boost disks).
types of HDDs (except for the hybrid volume, which also includes SSD boost disks).
Note:
RAID 0 does not support redundancy and is therefore not considered in
this guide.
The table is sorted by RAID type from highest to lowest performance.
Table 2. RAID types arranged from highest to lowest performance
RAID Type
Performance
RAID 10
•
Highest throughput performance and lowest number of IOPS compared to the other
RAID types.
RAID types.
•
Requires one mirror disk for each storage disk.
Hybrid
RAID 5+0 with
three SSD boost
disks
three SSD boost
disks
•
The expansion allows for highly increased performance compared to RAID 5 without
boost disks.
boost disks.
•
Requires one parity disk for each expansion.
•
Requires a minimum of two drive bays for boost disks.
RAID 5+0
•
The expansion allows for increased performance compared to RAID 5 without
expansion.
expansion.
•
Requires one parity disk for each expansion.
RAID 6+0
•
The expansion allows for increased performance compared to RAID 6 without
expansion.
expansion.
•
Requires two parity disks for each expansion.
RAID 5
•
Low performance compared to the other RAID types.
RAID 6
•
Lowest performance compared to the other RAID types.
The following three graphs are based on a volume with 12 SATA disks and a transfer of
200
200
GB data over iSCSI.