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Seagate Backup Plus Slim External USB 3.0 2TB Hard Drive Review

Adaptec AAA-UDMA RAID Controller

Adaptec AAA-UDMA RAID Controller - PCSTATS
Abstract: The controller is the AAA-UDMA, a four-channel UDMA/66 RAID controller supporting up to four hard drives in RAID 0, RAID 1, RAID 0/1, and RAID 5 configurations.
Filed under: Servers Published:  Author: 
External Mfg. Website: Adaptec Mar 30 2001   D. Dee  
Home > Reviews > Servers > Adaptec AAA-UDMA

Three Drives improve performance

Would the addition of a third drive improve things significantly? Let's see:





These are also strange results. Although read speeds are back up somewhat, they're still slower than the single drive. Write performance increases further over that of the two-drive array, but I can't fathom why the read performance is inferior to that of just one drive. Again, there should be another performance increase from that of two drives in all areas. The story continues with a four-drive RAID 0 array:





Now, an ideal four-drive RAID 0 array should have four times the performance of a single drive, and I don't think it's unreasonable to expect that, even in practice, a four-drive array should have over 250% of a single drive's performance. But these numbers fall far short of those expectations. Some of these numbers are better than those turned in by the three-drive array, but some are worse. SiSoft's Sandra favors this array compared to a single drive, but the other benchmarking programs produce varying results in such a comparison. Again, I have no good explanation for these confusing numbers.

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Contents of Article: Adaptec AAA-UDMA
 Pg 1.  Adaptec AAA-UDMA RAID Controller
 Pg 2.  A little about RAID
 Pg 3.  Initialization time for the array
 Pg 4.  The full specs
 Pg 5.  — Three Drives improve performance
 Pg 6.  RAID 0 Performance
 Pg 7.  RAID 1 Performance
 Pg 8.  OS Supported
 Pg 9.  Software management
 Pg 10.  CI/O software
 Pg 11.  RAID 5 benchmarks
 Pg 12.  processor usage
 Pg 13.  Conclusions

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   12 / 14 / 2017 | 12:00PM
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