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HP Smart Array Controllers and basic RAID performance factors

ManualsBrandsHP ManualsComputer AccessoriesHP Smart Array P222/512MB FBWC 6Gb 1-port Int/1-port Ext SAS Controller
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Figure 12. Scaling of 256 KiB sequential write performance, drive limited until reaching the 4 x 6 GiB SAS bandwidth limit
Configuration: Smart Array P421 controller, 2 GiB cache; 15K SAS drives; queue fixed at 64 or maximum IOPS measured for queue
depth from 1 to 256.
Note: RAID 5 measurements with more than 14 drives are for illustrative purposes only. HP does not recommend RAID 5 arrays larger
than 14 drives (depending on tolerance for data loss and type of drive, 14 drives may be too many).
0
500
1,000
1,500
2,000
2,500
4 Drives
8 Drives
12 Drives
16 Drives
RAID 0
RAID 10
RAID 5
RAID 6
MiB/s