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Building my first NAS, need some help choosing right switch


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9 replies to this topic

#1 bashitmashitcrashit

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Posted 21 September 2017 - 11:13 AM

Hi guys, so I was thinking of using my old htpc as NAS with three sata2 hdd's in raid5. I will connect all my computers with switch, I was wondering if 10/100 switch is enough or will I notice much better performance with 10/100/1000 switch? Any other tips about building NAS will be also appreciated. Thanks. 



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#2 arlattimor

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Posted 21 September 2017 - 11:54 AM

How many users do you intend your NAS to support? Also how many computers attached to the switch?


Edited by arlattimor, 21 September 2017 - 11:56 AM.

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#3 arlattimor

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Posted 21 September 2017 - 12:00 PM

If this is a small network the market has Unmanaged Gigabit Workgroup Switches that come in 5, 8, and 16 port configurations.You can get them mostly for under $50.00 bones just look around big guy.


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#4 Wand3r3r

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Posted 21 September 2017 - 12:02 PM

don't bother with a 10/100 switch when 10/100/1000 are cheap and available. future proof



#5 bashitmashitcrashit

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Posted 21 September 2017 - 01:51 PM

There's going to be just a few users. 3-7 computers attached to the switch. Yes I know you can get gigabit switches cheaply but still wanted to find out if the raid5 write and read speeds with sata2 drives are slower then 10/100 connection to another computer. Is the 10/100 going to be the bottleneck when saving files to NAS via switch or are the drives so slow that it really doesn't matter...



#6 Kilroy

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Posted 21 September 2017 - 02:20 PM

The first question would be does your HTPC have a GB NIC?  If not, this whole discussion is pointless.

 

From, "SATA II (revision 2.x) interface, formally known as SATA 3Gb/s, is a second generation SATA interface running at 3.0 Gb/s. The bandwidth throughput, which is supported by the interface, is up to 300MB/s"

 

So, even if your drives took a 50% performance hit in RAID5 they would still be faster than the speed supported by your current switch.  While the drives will be the bottleneck if you use a GB switch you will see a noticeable performance increase over the 10/100 switch when performing actions with large amounts data.



#7 bashitmashitcrashit

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Posted 21 September 2017 - 02:35 PM

yes my HTPC has GB NIC. And I'm aware of sata2 speeds, but I'm not sure what the performance will be in raid5. I think in raid5 the raid controller will have more important role with the perfiormance then with raid1 or raid0.



#8 Kilroy

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Posted 21 September 2017 - 03:10 PM

Even if your drives went to 150MB/s due to RAID 5 the drives would still be faster than your network connection using the 10/100 switch.  Here is a RAID Calculator it looks like RAID 5 will give you a little over 300MB/s.



#9 bashitmashitcrashit

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Posted 21 September 2017 - 04:12 PM

Thanks for the help. that's all I wanted to know. 



#10 toofarnorth

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Posted 22 September 2017 - 01:49 PM

Even if your drives went to 150MB/s due to RAID 5 the drives would still be faster than your network connection using the 10/100 switch.  Here is a RAID Calculator it looks like RAID 5 will give you a little over 300MB/s.

100Mbit network speed gives you around 12MB/s in transfer speed

1Gbit network maxes out at 110MB/s

Go with Gigabit :)

 

 

tfn






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