4 drive raidz2 with 5400rpm, can it saturate a 1gbs link?

[ideal2545]

Hi Guys,

I'm rebuilding my FreeNAS with 4, 3TB WD Green drives (hacked) and want to run raidz2. Do you guys think that network performance wise I would be able to saturate a 1GBS link?

New to all this, my ultimate goal is to just fully saturate a 1gbs link while getting 'good' protection. Your help is much appreciated!

Just for background, this is running on a Lenovo TS430, with an Intel Xeon E3-1220V2 and 12gigs of ECC Ram. Just for home use, pics, movies, etc.

Thanks,

Jon

 

[Bidule0hm]

Yes, no problem ;)

 

[Spearfoot]

Yes. My test system has 4 old, slow 3Gb/s SATA drives and it saturates a 1Gb/s link.

 

[Peter Jakab]

Hi,

Just calculate 5400rpm instead of 7200rpm mostly impact latency not bulk file transfer rate. If the 4 disk able to provide stable 100MByte/sec average read that mean 400MByte/sec=400*8Bit/Byte=3200Mbit/sec which is more than simple 1000Mbit/sec Gigabit link.
Of course this is the simple theoritical burst file tranfer rate from 4 disk parallely but the pratically measured real value also close for this. That mean with 2 old SATA1 disk in simple stripe and then you able over load Gigabit interface.

I also have near same test config with 4qty of 500GB Segate Constellation ES 7200rpm. But just I see then all of them have parallel 120MByte/sec read rate when I running the scurb test. With simple Gigabit interface I unable overload them. 7200rpm just give me faster reaction times (if I able to detect as slow human)

Bye,
Jackson