Sudden loss of file transfer speed

[woolooloo]

I've been copying files over to my unRaid pretty happily now at roughly 60-80MB/second (according to Windows Explorer). Copying directly over to my HTPC was going at over 100MB/sec.

 

Now suddenly the file transfer speed over to both devices is maxing out around 11 MB/sec and I'm at a loss. I've rebooted all my switches (HP Procurve) with no effect. I have used a program called LAN Speed Test and it is showing about 88MB/sec to both my unRaid and my HTPC - so it doesn't seem to be network related.

 

At first I thought it coincided with my conversion of my data drive on my source computer from Raid 0 to Raid 1 since I was seeing some flakiness and got a little scared about keeping the Raid 0. Even though I backup, if it happened in the middle of a high priority project, I would still be toast. But the Crystal Disk Mark disk benchmark still showed plenty of speed for the Raid 1. I have just deleted the Raid 1 and am using a single data drive and still see no difference, still 11MB/sec.

 

I have no idea what else could be causing this but I'm really annoyed by it because it now takes about an hour to copy a BluRay ISO to my unRaid instead of about 10 minutes. I know this isn't the best forum to be asking this since it is offtopic, but thought I'd try here before I go off in search of another forum where I'm not a member. Anyone have any ideas? TIA

[Johnm]

you are not really giving us any data on your unraid build.

 

cache drive now full?

 

did you just fill up a sata disk and move to an IDE disk or a disk on a slower sata port inside your unraid?

 

did you upgrade it to a beta recently that might have a flaky nic card driver? is it a realtek 8111e? athros?

 

to many possibilities for us to just guess...

[woolooloo]

I don't think it is unRaid related, thus the Lounge posting. I am seeing the same problem moving files directly to my HTPC which is Win7. My unRaid is all SATA, the cache drive is empty, the log is clear of anything troubling. It has not changed at all since I started seeing this. I am seeing the same 11MB/sec speed copying files to the cache drive as directly to an unRaid disk.

 

Something in the pipeline seems to be limiting me to 11MB/sec but I can't figure out what. It doesn't seem to be the hard drives in my desktop Win7 machine because I can copy files between internal drive fast (although not as fast as I would expect, but certainly much faster than 11MB/sec). LAN Speed Test indicates the network is not the bottleneck.

 

Ok, here is another data point. I just moved a file from my HTPC to my unRaid and it went at 85MB/sec. So the common denominator appears to be there is only a problem moving files specifically from my desktop to other computers. This is the computer I have run LAN Speed Test from and that appears to be fine. I've got the latest (or at least no more than a couple weeks old) AMD Raid drivers. Besides moving from Raid 0 to Raid 1 to no Raid, I don't think anything else has changed on the machine. The data drives in my desktop are 500GB 7200RPM Sammys.

 

Again, I understand this is not unRaid related, just looking for some ideas on what I could try. Or even what other forum I could go to for help. Thanks.

[Johnm]

ah, you never mentioned 3rd PC.. or i missed it.

 

did you get a windows update that updated your nic driver?

try unplugging the unraid and copy to the htpc. try it with htpc unplugged.

 

try coping from your non system drive on your Desktop.

check the port on your procurve. it is set at gig?

check your nic is set correct.

force it to gig full duplex.

check you're not sending out jumbo packets exceeding what your switch can handle

 

 

reboot everything..

 

 

if you have a linksys router/gateway on the network somewhere. those get buggy. especially after lots of torrent type downloads. reboot it.

 

just a few things that come to mind..

[woolooloo]

Thanks for all the tips. I have tried all those things now without success. A few other things I have tried:

 

* Put in an Intel NIC and disabled the onboard NIC. No change.

* Put in my old SSD boot drive in place of the one I upgraded to about 6 months ago. It still had the old Win7 on it from back then, so if it worked it would indicate some sort of recent driver/OS issue. I thought for sure this would fix it, but no change.

* Put in a 2 port SATA card and moved my DVD and Bluray drives to that card, leaving just my SSD boot and regular HD data drive on the MB's SATA ports. No change.

* Replaced the SATA cables to both hard drives. No change.

* Tried moving the files from both my HD and my SSD, same 11MB/sec transfer speed from both.

* Tried two different (but identical model) HDs, one at a time, to rule out some sort of drive malfunction that is affecting the bus. Since I also tried 2 SSDs and replaced all the cables, I think I've done what I can.

* Ran CrystalDiskMark on both my SSD and HD and compared the results to some that I recorded probably a year ago in the same system. All disk benchmarks seem to indicate 20-30% speed loss.

 

 

The fact that I wasn't able to go back to my old SSD and OS seems to me to point to some sort of hardware rather than software problem, but I can't imagine what else to look at. Also I can't even copy from my HD to my SSD or vice versa at the same speed that I used to be able to copy from another computer to this one over the network. Also, the system seems unstable and is locking up a lot. Could this point to something on my MB dying?

[Bizarroterl]

Have you tried uninstalling your AV?  I've had a couple experiences where a new update slowed things down a lot....

[aiden]

Are you using user shares?  If so, what settings?  Is it possible you are trying to write to a full disk?  That's happened to me in the past when I did not enforce a minimum free disk space setting.

[Grobalt]

I have the same problem, yesterday i tested to copy files internally from one disk to another - between 6 and 10mb/s.

The night after i run memtest 3 cycles 11 hours - all perfect.

 

HP Microserver, Bios mod, 8GB ECC

Parity: 1 EARX  2TB

Storage drives:

3x WD 2TB (1x EARS, 2x EARX)

2x Samsung 750GB JD753LJ