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Random data reads scale well as the queue depth increases. Incidentally, this is affected by the cache. If you read our SSD reviews, you already understand how caching exerts its influence on the performance of storage hardware. Even without Storage Spaces' tiering, WSS makes use of available DRAM to increase I/O performance.
Different products use cache differently. Here, we see Thecus' N5810Pro caching random data writes. The heavy waves demonstrate the appliances strong performance when data is in the cache, and lower performance after a cache flush when information is not ready to be read back. A cache miss, demonstrated by the N5810Pro at a queue depth of 128 in the 8KB chart, can cause very slow performance.
The W5000 delivers smooth random write speeds, though its IOPS are troubling. A result of less than 100 IOPS with both 4KB and 8KB blocks is not good.
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"Low-cost Windows Storage Servers (WSS) give small businesses access to enterprise-class features at a desktop price."Reply
Um, is this a hardware review or a press release?
Did you read the review and verdict?Reply
While many people may actually use RAID 5 with this device, this is what we call professional malpractice among IT pros.Reply
You need to understand a couple of things about all of those articles. The articles are not talking about your home or small business NAS with four or five drives to start with. The ZDNET author has a history of writing articles and article titles to bring people in. Many disagree with Robin's findings. I wouldn't say that is the case with the only article that relates to this review though, Why RAID 5 Stops Working in 2009. In that article he references a 7-drive RAID 5 array. With 6 or more drives we use RAID 6 (RAID 10 in some cases) for the very reason he cites. With five drives and in a home or small business environment RAID 5 is sufficient as long as you are proactive. Keep the system on a battery backup, keep air vents fee of dust and if a drive fails replace it right away.Reply
Some users may want to take redundancy to the next level and run RAID 6 on a 5 drive array. That is fine and I know people that do. I don't recommend it on a sub-1000 Dollar system that already has performance issues with RAID 5 though.
"We rarely hear of failures in the field"Reply
Here I am.
"In our own experience, NAS failures come from easy-to-replace fans and power supplies, rather than the main components that make up the heart of the system."
Changed power supply and changed fan but still no fun.
I had to dump my DS411Slim after putting some € on it in an attempt to fix.
The brown thing happens.