Readynas Duo v2 poor performance on SMB connection

Finally I had a WE to perform all test. First of all, Intel NAS do not work with 7 and 8 x64, so I had to stick with NAS Performance tester. I must honestly said that performance are the same with the 104 and Duo v2, with about 11,5MB/s using standard Windows share according to the software (11,5MB DUO vs 11,8MB 104). It seems that the same problem with the Duo affects even the 104 on Windows machine. This seems strange to me because with other DL/UL I made the 104 performed better, but I had to report what the software said.

On the other side, since my Ubuntu desktop sees both SMB and CIFS (Duo) and ATP (104) share, when I choose CIFS/ATP both NAS perform much better, around 30MB/s.

I still wonder why this huge difference between "standard" SMB and CIFS, which should be a sort fo SMB dialect.

I forgot to mention that I made I direct connection in each case. Both NAS use Seagate 4TB NAS HD and capacity is 20% for both.

My RN102 with NasTester 1.7 showed 48.94 MB/sec write and 60.01 MB/sec read the last time I checked it (about a week ago). This is running 6.2.0-T1286 beta firmware. The test platform is a Thinkpad 440s with an SSD disk running Win 7. The network connection is gigabit, through my GS724T switch.

My configuration is jbod with a single WD30EFRX. Bit-rot protection is on, hourly snapshots are enabled. Antivirus is off. No jumbo frames.

So I am puzzled about your results.

This is my configuration:

- 104 with 4 Seagate NAS disk, RAID5, everything disabled (BTW, what is the bot-rot protection?)
- Duo v2 with 2 Seagate NAS, RAID 1
- HP PC with i7 1.8Ghz, 8MB RAM, hd 750MB but only 5300 rpm and Win8.1
- HP PCsix year old (I do not remember the CPU), 3GB, Ubuntu 14.04
- Gigabit LAN with Netgear switch

I know that the 104 results seem a little strange, but i performed a 5 cycles test in order to get a proper result.

Since I am interested in 1080p streaming I am waiting for a new media player with gigabit LAN to see if this speed is enough.

[Thumper wrote:
]...Since I am interested in 1080p streaming I am waiting for a new media player with gigabit LAN to see if this speed is enough.

[Thumper] wrote:
- ReadyNas DUO v2 - USB 2.0 disk: 20-25MB/s - ReadyNas DUO v2 CIFS: average 27MB/s - ReadyNas DUO v2 SMB: average 10MB/S

1080p HD streaming requires 1-2 MB/sec for typical downloads and 7-8 MB/s for full bluray streaming. (8-16 mbits for the downloads, and 54 mbits is the max rate for BluRay).

So (a) gigabit is not needed and (b) your tested speeds are fast enough. Though they are a lot slower than they should be. Do you have jumbo frames enabled? (I'm not recommending them, just trying to sort out what might be happening here).

On bit-rot: The btrfs file system includes the facility to create file checksums and it has some ability to repair damage to files and metadata. This is enabled in the RN102 6.2 beta release. I haven't seen definitive information from netgear on exactly repairs are possible (especially in my case, since I am running jbod). But I enabled the setting anyway.

I think you would need to be running a RAID level with some redundancy to benefit from bit-rot protection.

mdgm wrote:
I think you would need to be running a RAID level with some redundancy to benefit from bit-rot protection.

The checksums have value even if the files can't be repaired, as they verify the files are intact. I had checksums enabled before, and the corresponding option now seems to be bit-rot.

I think the built-in bit-rot repair depends on btrfs itself, not the underlying RAID - unless Netgear has added some specialized repair.

No jumbo frames, since they are not supported by the HTPC. Next one will support them so I will use jumbo frame in the next future.

Are there any trick to further improve speed both on DUO and 104?

For what its worth I have the same issue with SAMBA shares on the Duo v2.

I noticed on my WD-TV I was starting to get stuttering on large movies. 8/10 GB or so.
I downloaded some high bit rate test files from http://jell.yfish.us/ to try the SAMBA and NFS share performance.

Accessing the SAMBA shares, even a 15Mbps video had stuttering playing back on the WD-TV. Accessing through the NFS share I got upto 35Mbps before any stuttering happened.
Copying files in windows, I max out at about 25MB/s. 2x2TB drives in mirrored form.
No jumbo frames, all gigabit wired.

If you have a windows PC, perhaps try NasTester to benchmark the SMB performance (http://www.808.dk/?code-csharp-nas-performance)

Did you change anything in the network - particularly a switch or router? Is the connection ethernet or WiFi/powerline?

Many players use fast ethernet connections. If you have a gigabit network, then you often run see these symptoms if the switch/router nearest the player doesn't support ethernet flow control. what happens is that packets queue up in the switch (which is downspeeding the connection), and w/o flow control the packets might sometimes overflow the queue.

Seems to be the SMB code netgear are using for their NAS's is just awful.
There's threads all over the place about how SMB speed is awful on a range of Netgear NAS's and OS's.

Are Netgear going to do anything about this ?