SSD in NAS? Bottleneck?

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raaasse

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Dec 13, 2014
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I have searched for an answer for this and i can't find anything so i hope some of you can help me out.
Before i ask anything, don't think about the price.

So if i have a TV which i wan't to connect to a NAS, over Gigabit ethernet (through a modem/router) (HDMI is possible in option 2), i thought that i would go with SSD:s, because 500 MB/s read and write. The Nas is also connected to a PC.

Both of these say they support SSD:s but the max read / write on these are ~100MB/s (read & ~80 MB/s (write), why? What's the bottleneck?

https://www.qnap.com/i/en/product/model.php?II=156
http://www.asustor.com/product?p_id=20&lan=en

Basically my question is, are there any NAS:ses for this price (around 300-500€) where i can use SSD:s or should i just go with HDD:s?

Thanks
 
Solution
geofelt
Such devices are not using Intel integrated sata, but other adapters such as asmedia or marvell which do not transfer data as fast.

One option for you is to build your own server based on a conventional motherboard capable of sata 6gb.
There are likely some other has devices which are more capable, but I am no expert on nas.

It might be a moot point because the gigabit Ethernet throughput capability is likely much less than the drive throughput capability. I think gigabIt Ethernet has a theoretical transfer rate of 125 gB per second. A more practical 60GB.
Note giga BIT vs giga BYTE.
There may be some nas devices that use thunderbolt, Esata, or usb3.1 which might be faster.
Actually, a hard drive is very good in sequential...
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geofelt

geofelt

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Such devices are not using Intel integrated sata, but other adapters such as asmedia or marvell which do not transfer data as fast.

One option for you is to build your own server based on a conventional motherboard capable of sata 6gb.
There are likely some other has devices which are more capable, but I am no expert on nas.

It might be a moot point because the gigabit Ethernet throughput capability is likely much less than the drive throughput capability. I think gigabIt Ethernet has a theoretical transfer rate of 125 gB per second. A more practical 60GB.
Note giga BIT vs giga BYTE.
There may be some nas devices that use thunderbolt, Esata, or usb3.1 which might be faster.
Actually, a hard drive is very good in sequential operations, you buy a ssd mostly for the random I/o speed.
 
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Solution
kanewolf

kanewolf

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the limitation is the Gigabit network. 100MB is 800Mb. That is close to the limitations of gigabit network for most situations. With SSD, your read and write speeds will probably be 100MB.

Unless you have SSDs laying around that you want to use I would use NAS rated HDDs. WD REDs or similar.
 
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