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Accusys Acuta 4S
Milind Bandekar, Aug 31, 2005 1010 hrs ISTFour hard drives in a RAID for maximum performance and security!
2TB of storage with RAID support, hot swapping, portable, easy installation, SATA interface
Overpriced, Not max at performance, useless software, setting up Raid 5 is a painful task.
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Based on the above mentioned settings and the benchmarks conducted on a Pentium Dual Core processor with Intel 945 motherboard topped with 1 GB DDR2 RAM, what we got in return was not as promising. Technically with SATA connectivity and Raid 5 combination, it s supposed to outperform. However, with our benchmarks conducted using SiSoft Sandra, HD Tach 2.7 and HD Tach version 3, the computed data read speed was 77MB/s, 69.4 MB/s and 75.1 MB/s respectively. This on an average comes around 73 MB/s.
From the graphs we found out that the read speed was stable at around 70 MB/s, however the consistency in this was remarkable. This we could judge from the Raw Hard drive benchmarks. The average read speed of the Hard Drive was almost in par with the benchmarks of the Acuta 4S. However, there were a lot of inconsistencies observed in the data transfers as seen in the graphs above. With these transfer rates we were convinced that there must be a bottleneck somewhere slowing things down. To our guess it probably runs on the FireWire 800 controller from the earlier version, or perhaps it s the XOR chip that limits its capabilities. If given a better XOR chip with capabilities of processing at higher speed, this device would actually give results close to as what expected.
Similarly the write speed was computed as 55MB/s by SiSoft Sandra and 38.5 MB/s by HD Tach 2.7, with an access time of 19ms and 11.7 ms respectively, which again is marginally higher than the benchmark results of the Raw Hard Drive. Looking at these values and the consistency, we were able to determine that, if it was a faster XOR chip for processing, maybe it would have topped the benchmarks in par with SATA speed.
Considering the SATA data transfer capacity of about 120 MB/s coupled with RAID 5 and equipped with 10,000 RPM hard drives, the expected results were somewhere near 100 to 120 MB/s, but the practical results turned out to be not so. Rather the overall indexed value was around 59 MB/s by SiSoft and 58.1 MB/s by HD Tach 2.7, An acceptable figure, but not remarkable. This doesn't stand out well in the performance section, which technically should have been much better for a device with such high specifications.
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