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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

RAID 5 benchmarks

Adaptec touts the fact that this is currently the only ATA controller that supports RAID 5. The RAID 0 results were not terribly encouraging, will the adapter make a comeback with RAID 5? I have read that some SCSI RAID cards are so thoroughly optimized for RAID 5 that they actually perform better with it than with RAID 0. Might this the case with the AAA-UDMA? Let's look at the three-drive RAID 5 numbers:





Answer: no. These are terrible performance numbers. The only good thing I can see in them is the extremely low processor usage. One should expect the parity calculations to have a significant impact on RAID 5 performance compared to RAID 0 (assuming no special RAID 5 optimizations), but this is really a poor showing. As the four-drive RAID 5 numbers will show, adding another drive doesn't help:



 

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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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