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Today we are using a slightly different network configuration than we have done previously – this means that these results today are not comparable to our other NAS reviews. The reason for this is simple – the DS3611xs has an insane amount of bandwidth in the right network. We are basing our network around two linked Belkin 1Gbit switches with 4x Gbit LAN connections to the DS3611xs.
We are using three separate RAID 0 configurations across 6x1TB (3x2TB Raid 0) hard drives set into a 802.3ad dynamic link aggregation configuration. This enables multiple connections to be linked in parallel to increase the link speed beyond the limits of any one single cable or port and to increase the redundancy for higher availability.
Most implementations now conform to what used to be clause 43 of IEEE 802.3-2005 Ethernet standard, usually still referred to by its working group name of “IEEE 802.3ad”. The definition of link aggregation has since moved to a standalone IEEE 802.1AX standard.
We are opening 9 connections and copying 3 big files to each of the paired Raid 0 drive configurations. To try and mirror a business environment we set up three local machines with 120GB ADATA S511 SSD drives to ensure that no local drive limiting will be a problem. Each of these drives are transferring multiple files, back and forward.
We managed to achieve a simultaneous total of 507 MB/s, which is an incredible result. We know in this case that the DS3611xs has more potential on tap but our network and drive configuration is limiting the overall bandwidth. We are confident that Synology's claims of 1000+ MB/sec are accurate, but we simply can't utilise this hardware to its full potential.
We managed to achieve a total of 490MB/s when writing to the six paired drives, which is again a staggering network result.
