bad performance of external disk on ds210j

[jmp]

I has an external disk attached to my ds210j through USB port, i used "hdparm -t" to test its performance and to my suprise the number was 5M on average.
I tested the same disk on my laptop and the performance number was 30M+

I am wondering why the performance is so bad on my ds210j? does anyone else meet this problem?

[jmp]

looks like this is a general issue of linux? googling "linux usb external disk slow" give a lot of pages...

[sjeph8je]

Hi,

I have a conceptronic usb disk attached and I get about 26 MB / s. The disk is EXT4 formatted. There are some reports that with NTFS it might be a lot slower.

Best regards

[andystar]

I've noticed the following performance for USB external drive:
(Tested by transferring 3GB of data from internal NAS drive to external USB drive)

NTFS format: ~6MB/s
EXT3 format: ~20MB/s
EXT4 format: ~21MB/s

I'd like to stay with NTFS for simplicity, if my NAS dies at least I can plug the NTFS drive into my windows machine and read it.
Still working on getting an external EXT3/4 formatted USB drive to mount on Windows (if you know how, help is appreciated)

[HarryPotter]

EXT4 on Windows is not possible (at least there is nobody reporting a working driver until now)
EXT3 is no problem, search for ext3 driver for windows.

[abasoufiane]

Hi,

Since upgrading my DS110j to DSM 3.0-1334 i have run into a couple of bugs that i can live with except for this one: TRansfering files from my Internal hadr drive to my extrenal HD is extremly slow, the speed does not exceed 3MB/ s. transfering file from synology to a regular USB drive (2 go) reach 6 mB /s which could be considered as a normal write speed.
MY ex HD (seagat 1.5 TB) runs normaly, i tried to transfer files from my desktop to it and the speed reach 70 mb /s. so what could be the problem ? and what can be a potential fix. Thank you

[andystar]

I've seen similar LOW transfer speeds (~6MB/s) when copying from NAS to external USB NTFS drive.
I achieved ~20MB/s if the external USB drive was formatted ext3.

The only solution I've found that lets me see the external USB ext3 partition in Windows is Paragon extBrowser.
All the other solutions I've seen recommended on these boards, ext2ifs, ext2fs, have not worked for me.
I wonder if the type of external USB drive impacts this. I'm using a Seagate GoFlex 500GB USB drive.

What I find strange is if I plug a USB drive into the front USB port and perform a "USB Copy" using the
one touch copy button I get ~17MB/s transfer rates.

Why fast rates with one touch USB copy from a NTFS drive, but not equivalent rates when copying
from ext3 to NTFS?

[maxxfi]

I
Why fast rates with one touch USB copy from a NTFS drive, but not equivalent rates when copying
from ext3 to NTFS?

Write access to NTFS is the problem.

[Neo_Moucha]

Write access to NTFS is the problem.

And there can't be done anything about it?

I have DS211 with 2 USB 3TB drives connected:
- NTFS - write speed is poor 15000 kB/s, CPU usage 94%
- EXT4 - write speed is nice 33000 kB/s, CPU usage 35%
(read speed in both cases around 23000 kB/s)

The same file (700MB) copied from Windows to DS - first NTFS USB HDD, second EXT4 USB HDD:


I wonder if I upgrade to DS212, am I going to benefit from the USB 3.0 controller (because both my USB drives are USB 3.0) or am I going to get same lame writing speed for the NTFS formatted one?

[maxxfi]

And there can't be done anything about it?

Ask Microsoft to release the sources for NTFS, or at least to open the patents that are protecting it.
That would allow developers to improve the drivers.

[julient]

I have a DS410j with DSM 4.0-2198 and I also get this problem.
I tried to do a copy between 2 external USB hard disk (ext4 to ext4, tested before ext4 to ntfs and slower; both western digital - one disk + textorm case & one My Book essential usb3) and get very slow results.
'hdparm -tT' returns 200-230/25-28 MB/sec but rsync copy gets 3-5MB/sec with top at 50% usr, 45% sys, 1-4% i/o.

on a another box with lubuntu, 'hdparm -Tt' return about 270/30 MB/sec results but copy still stay between 2-4 MB/sec ...

> cat /sys/block/sd*/device/max_sectors
240
240
from what I saw on the web, this could be increased to 1024 but for me, it has little improvement, maybe 1MB more.

'mount -o remount,async' doesn't seem to make any changes too.

That makes a one TB copy to about ~58 hours ... while I got some network transfer on gigabit ethernet at ~20MB/sec ...

Any ideas how to improved this ?

Thanks