U320 SCSI HDD ROUNDUP

Seagate Cheetah 15K.5

As mentioned in the previous page, here we have the 15K.5, the newest Seagate Cheetah. 

Click on the logo above to view the Cheetah webpage at the Seagate website.

HD Tach 3.0.1.0 RW, 8MB Zones: Burst: 226.2 MB/s, Ave. Read: 112.9 MB/s, Ave. Write: 84.9 MB/s, Random Access: 5.8 ms, CPU: 1%

HD Tach 3.0.1.0 RW, 32MB Zones: Burst: 226.0 MB/s, Ave. Read: 113.0 MB/s, Ave. Write: 103.4 MB/s, Random Access: 5.7 ms, CPU: 1%

HD Tach 3.0.1.0 RW, VAR Zones: Burst: 225.7 MB/s, Ave. Read: 113.0 MB/s, Ave. Write: 111.5 MB/s, Random Access: 5.7 ms, CPU: 1%

WOW!  Awesome results from the latest Cheetah!  In excess of 120 MB/s in both reads and writes!

Strangely enough, the inconsistent writes are still present in this RAID_0 test of two 15K.5 drives.  Nevertheless, the performance is astounding.  Keep in mind that the test above, and all others, used 64k stripe sizes.  The test below is exactly the same, except the stripe size used in the Adaptec Host Raid is 32k. 

As we can see in comparing the two graphs, having a smaller stripe size reduces performance slightly. 

The RAID_1 test above also shows strange inconsistencies across the data range.  Performance still is better than other drives in many of the data sizes.