ejolson
Posts: 3547
Joined: Tue Mar 18, 2014 11:47 am

IngoKnito's Pi1+USB+Samba Problem

Mon Jul 23, 2018 5:56 pm

When Samba is used to share files from a USB storage device mounted on the Pi, wired networking errors have been reported for different models. Problems with the newest 3B+ have been resolved by turning off TCP transmit segmentation offload, which is now the default. This thread specifically addresses a similar problem with the original Pi 1B (the one that uses the bigger SD cards) reported by IngoKnito.
Last edited by ejolson on Mon Jul 23, 2018 6:25 pm, edited 2 times in total.

ejolson
Posts: 3547
Joined: Tue Mar 18, 2014 11:47 am

Re: IngoKnito's Pi1+USB+Samba Problem

Mon Jul 23, 2018 6:15 pm

Since the Pi 1 was working fine before, aside from a kernel regression maybe a networking cable or switch has gone bad over time.

To check this, I would suggest changing the network cable if you can, power cycling any routers and network switches that you are using and finally rebooting the Pi. Does the problem persist?

LTolledo
Posts: 1942
Joined: Sat Mar 17, 2018 7:29 am
Location: Anime Heartland

Re: IngoKnito's Pi1+USB+Samba Problem

Mon Jul 23, 2018 9:26 pm

@ejolson Thanks for creating the topic.

Here's my my setup for the test.

A. Raspberry Pi (c) 2011.12 with 512MB (lets call it RPi1B) , with
A1. Raspbian Stretch with Desktop on 8GB Transcend SD card (updated and upgraded as of July 23, 2018)
A2. Ethernet connection to Ethernet Switch HUB -B
A3. Samba server and client installed, running fine
A4. 3 share folder in Ext4 format (inside 8G BSD Card)
A5. NTFS formatted 128GB Cruzerfit USB flash memory plugged into vacant USB port
A6. of the 512MB on board memory, 192MB is allocated for video because of Kodi
A7. RPi1B connected to 8" HDMI monitor, 2.4GHz wireless keyboard and mouse
A8. RPi1B is autoboot to Kodi (used mainly as Kodi Media Player)
A9. PSU is 5v 3.0A, shared with 8" Monitor
A10. I2S DAC HifiBerry clone connected to 26-pin GPIO

B. NAS (EXT4 format) connected to Ethernet Switch HUB- A

C. Ethernet Switch HUB -B connected to Ethernet Switch Hub -A

What I did.
1. Exited from Kodi after boot
2. Using the RPi1B Stretch desktop file manager, connected to the samba share of NAS
3. Selected a 4GB video file ( a single file! not a directory of smaller files)from my video collection in the NAS.
4. Copied the 4GB video file to the 128GB USB memory plugged into RPi1B
5. Copy completed in under 30 minutes... no errors...

Using RPi1B copying a 4GB file over samba and saving it to USB Flash memory plugged into RPi1B's USB port did not produce any error or freezes

An 8GB video file took about 55 minutes to complete the copy from NAS to RPi1B's 128GB USB flash memory...

Other info about the setup:

Code: Select all

~ $ cat /proc/cpuinfo
processor	: 0
model name	: ARMv6-compatible processor rev 7 (v6l)
BogoMIPS	: 697.95
Features	: half thumb fastmult vfp edsp java tls 
CPU implementer	: 0x41
CPU architecture: 7
CPU variant	: 0x0
CPU part	: 0xb76
CPU revision	: 7

Hardware	: BCM2835
Revision	: 000e
Serial		: 00000000fdb1fc19

Code: Select all

~ $ uname -a
Linux Raspi1B 4.14.52+ #1123 Wed Jun 27 17:05:32 BST 2018 armv6l GNU/Linux

Code: Select all

~$ apt-cache policy raspberrypi-kernel
raspberrypi-kernel:
  Installed: 1.20180703-1
  Candidate: 1.20180703-1
  Version table:
 *** 1.20180703-1 500
        500 http://archive.raspberrypi.org/debian stretch/main armhf Packages
        100 /var/lib/dpkg/status
"Don't come to me with 'issues' for I don't know how to deal with those
Come to me with 'problems' and I'll help you find solutions"

Some people be like:
"Help me! Am drowning! But dont you dare touch me nor come near me!"

ejolson
Posts: 3547
Joined: Tue Mar 18, 2014 11:47 am

Re: IngoKnito's Pi1+USB+Samba Problem

Tue Jul 24, 2018 3:38 pm

LTolledo wrote:
Mon Jul 23, 2018 9:26 pm
2. Using the RPi1B Stretch desktop file manager, connected to the samba share of NAS
It looks like you are averaging about 20.8 Mbit for the 8GB file transfer.

From what I understand, the Samba share was served by the Pi and accessed by a different system in the original post, while in your test it is served by a different system and accessed by the Pi. As the code path for copying a file using SMB is likely quite different between the desktop file manager and the Samba server, this test seems inconclusive but at least works.

Note, in today's world people would be disappointed by the 20.8 Mbit average bandwidth you have between the NAS and the Pi. Do you know if the NAS was serving many other files at the same time?

LTolledo
Posts: 1942
Joined: Sat Mar 17, 2018 7:29 am
Location: Anime Heartland

Re: IngoKnito's Pi1+USB+Samba Problem

Tue Jul 24, 2018 9:45 pm

Samba share hosted by RPi1B... ok... lets do that too....

A. Samba Server: Raspberry Pi (c) 2011.12 with 512MB (lets call it RPi1B) , with
A1. Raspbian Stretch with Desktop on 8GB Transcend SD card (updated and upgraded as of July 23, 2018)
A2. Ethernet connection to Ethernet Switch HUB -B
A3. Samba server and client installed, running fine
A4. 3 share folder in Ext4 format (inside 8G BSD Card)
A5. NTFS formatted 128GB Cruzerfit USB flash memory plugged into vacant USB port - shared in samba
A6. of the 512MB on board memory, 192MB is allocated for video because of Kodi
A7. RPi1B connected to 8" HDMI monitor, 2.4GHz wireless keyboard and mouse
A8. RPi1B is autoboot to Kodi (used mainly as Kodi Media Player)
A9. PSU is 5v 3.0A, shared with 8" Monitor
A10. I2S DAC HifiBerry clone connected to 26-pin GPIO
A11. previously copied 4GB and 8GB file still in 128GB USB flash.
A12. Kodi running in the background (it is autoboot to Kodi as described in A8)

B. NAS (EXT4 format) connected to Ethernet Switch HUB- A

C. Ethernet Switch HUB -B connected to Ethernet Switch Hub -A

D. Ethernet Switch Hub-A connected to WiFi Router

E. Client: Raspberry Pi 3 Model B+ (lets call it RPi3B+) , with
E1. Raspbian Stretch with Desktop on 32GB Sandisk Cruzerfit USB Flash memory (native USB boot, Stretch is updated and upgraded as of July 22, 2018)
E2. Network Connection via WiFi to WiFi router described in D.
E3. Samba server and client installed, running fine
E4. 1 share folder in Ext4 format (inside 32GB USB Flash Memory)
E5. of the 1GB on board memory, 192MB is allocated for video because of Kodi
E6. RPi3B+ connected to HDMI monitor, 2.4GHz wireless keyboard and mouse
E7. PSU is 5v 2.5A
E8. I2S DAC HifiBerry clone connected to 40-pin GPIO

What I did.
1. Using the RPi3B+ Stretch desktop file manager, connected to the samba share of RPi1B
3. Selected a 4GB video file ( a single file! not a directory of smaller files)from my the shared directory in 128GB USB Flash
4. Copied the 4GB video file to desktop of RPi3B+
5. Copy completed in under 25 minutes... no errors...

Copying 4GB file from the RPi1B samba share server to the RPi3B+ client did not produce any error or freezes


I did not test the 8GB transfer due to time constraints...
The RPi3B+ is also used to access and write to this forum.

The NAS in the previous test is an old NAS I have and IS serving files to 5 other systems. Speed is fast if the client is fast, slow if the client is slow.
"Don't come to me with 'issues' for I don't know how to deal with those
Come to me with 'problems' and I'll help you find solutions"

Some people be like:
"Help me! Am drowning! But dont you dare touch me nor come near me!"

ejolson
Posts: 3547
Joined: Tue Mar 18, 2014 11:47 am

Re: IngoKnito's Pi1+USB+Samba Problem

Wed Jul 25, 2018 2:43 am

LTolledo wrote:
Tue Jul 24, 2018 9:45 pm
Samba share hosted by RPi1B... ok... lets do that too....
Everything seems to be working as expected.

If I read the original post correctly, the errors actually occur when uploading files to the Samba share rather than downloading them as you have done. While it can help to know it works for other people when trying to fix a problem, further testing would seem unnecessary unless the person who made the original post gets back with a status update.

LTolledo
Posts: 1942
Joined: Sat Mar 17, 2018 7:29 am
Location: Anime Heartland

Re: IngoKnito's Pi1+USB+Samba Problem

Wed Jul 25, 2018 3:33 am

Roger that....

as it strikes my curiosity.... might even try the other way around as described (writing to samba share in RPi1B), later in the day.... but will withheld the test results pending OP's return...

.... unless there is a special request to do so.....
"Don't come to me with 'issues' for I don't know how to deal with those
Come to me with 'problems' and I'll help you find solutions"

Some people be like:
"Help me! Am drowning! But dont you dare touch me nor come near me!"

IngoKnito
Posts: 12
Joined: Mon Jun 25, 2018 8:20 am

Re: IngoKnito's Pi1+USB+Samba Problem

Fri Jul 27, 2018 5:50 am

First of all: Thanks for the new thread and the help!

The problem occurs on a Upload on Files via SMB-share greater than ~ 64 MByte.
Download of files >64 MB is working fine.
Upload of files >64 MB via FTP: Working fine!!

I changed the Network-Port: No change.
I changed the USB-Cabling: No change.
Multiple reboot was done: No change. Kernel 4.14.52+ is active
The TCP transmit segmentation is already turned off

ejolson
Posts: 3547
Joined: Tue Mar 18, 2014 11:47 am

Re: IngoKnito's Pi1+USB+Samba Problem

Fri Jul 27, 2018 7:00 am

IngoKnito wrote:
Fri Jul 27, 2018 5:50 am
First of all: Thanks for the new thread and the help!

The problem occurs on a Upload on Files via SMB-share greater than ~ 64 MByte.
Download of files >64 MB is working fine.
Upload of files >64 MB via FTP: Working fine!!

I changed the Network-Port: No change.
I changed the USB-Cabling: No change.
Multiple reboot was done: No change. Kernel 4.14.52+ is active
The TCP transmit segmentation is already turned off
I find it fascinating that uploading directly to the USB drive via FTP works while doing the same using Samba doesn't. Equally interesting is that both FTP and Samba work fine when uploading to the SD card.

My Pi 1B is currently in storage where I can't retrieve it until next month. That would be the 512MB model with two USB ports that takes the larger sized SD cards. Is this the same kind of Pi that is causing the problems?

I'll be setting up a Pi 3B+ with Samba and an external USB drive later next week. If anything relevant to this thread turns up, I'll post it. Until then, I wonder if anyone else can reproduce the current problem.

IngoKnito
Posts: 12
Joined: Mon Jun 25, 2018 8:20 am

Re: IngoKnito's Pi1+USB+Samba Problem

Fri Jul 27, 2018 7:32 am

Yes. I have the PI1 with the two USB-Ports and SD-Card on the back.
It must be the "Pi 1 Model B"

JamieDDD
Posts: 5
Joined: Thu Jul 12, 2018 2:31 am

Re: IngoKnito's Pi1+USB+Samba Problem

Fri Jul 27, 2018 7:37 am

in my opinion, the Samba share was served by the Pi and accessed by a different system in the original post, while in your test it is served by a different system and accessed by the Pi. As the code path for copying a file using SMB is likely quite different between the desktop file manager and the Samba server, this test seems inconclusive but at least works, you can find some right answer at www.allicdata.com
https://www.allicdata.com

IngoKnito
Posts: 12
Joined: Mon Jun 25, 2018 8:20 am

Re: IngoKnito's Pi1+USB+Samba Problem

Fri Jul 27, 2018 7:45 am

This i don't understand. Sorry.

The USB-destination-path is exactly the same.
The installation was done over "apt-get install samba samba-common-bin": No special 3rd-party software.
The source is a laptop over two different protocols (SMB and FTP)
The file is the same.

How can the hardware-site www.allicdata.com help, if it looks like an software-issue?

LTolledo
Posts: 1942
Joined: Sat Mar 17, 2018 7:29 am
Location: Anime Heartland

Re: IngoKnito's Pi1+USB+Samba Problem

Fri Jul 27, 2018 10:22 am

As the OP has returned I'd like to post my test results from the other day

Samba share hosted by RPi1B... this time as the host to receive the large files

A. Samba Server: Raspberry Pi (c) 2011.12 with 512MB (lets call it RPi1B) , with
A1. Raspbian Stretch with Desktop on 8GB Transcend SD card (updated and upgraded as of July 23, 2018)
A2. Ethernet connection to Ethernet Switch HUB -B
A3. Samba server and client installed, running fine
A4. 3 share folder in Ext4 format (inside 8G BSD Card)
A5. NTFS formatted 128GB Cruzerfit USB flash memory plugged into vacant USB port - shared in samba
A6. of the 512MB on board memory, 192MB is allocated for video because of Kodi
A7. RPi1B connected to 8" HDMI monitor, 2.4GHz wireless keyboard and mouse
A8. RPi1B is autoboot to Kodi (used mainly as Kodi Media Player)
A9. PSU is 5v 3.0A, shared with 8" Monitor
A10. I2S DAC HifiBerry clone connected to 26-pin GPIO
A11. previously copied 4GB and 8GB file still in 128GB USB flash.
A12. Kodi running in the background (it is autoboot to Kodi as described in A8)

B. NAS (EXT4 format) connected to Ethernet Switch HUB- A

C. Ethernet Switch HUB -B connected to Ethernet Switch Hub -A

D. Ethernet Switch Hub-A connected to WiFi Router

E. Client: Raspberry Pi 3 Model B+ (lets call it RPi3B+) , with
E1. Raspbian Stretch with Desktop on 32GB Sandisk Cruzerfit USB Flash memory (native USB boot, Stretch is updated and upgraded as of July 22, 2018)
E2. Network Connection via WiFi to WiFi router described in D.
E3. Samba server and client installed, running fine
E4. 1 share folder in Ext4 format (inside 32GB USB Flash Memory)
E5. of the 1GB on board memory, 192MB is allocated for video because of Kodi
E6. RPi3B+ connected to HDMI monitor, 2.4GHz wireless keyboard and mouse
E7. PSU is 5v 2.5A
E8. I2S DAC HifiBerry clone connected to 40-pin GPIO

What I did.
1. Using the RPi3B+ Stretch desktop file manager, connected to the samba share of RPi1B (as indicated in A5)
3. Using the file manager of RPi3B+ selected a 4GB video file ( a single file! not a directory of smaller files) that was saved in desktop (from previous test above)
4. Copied the 4GB video file to the USB share folder in RPi1B
5. Copy completed in under 30 minutes... no errors...

4GB Route: RPi3B+ Desktop ---> WiFi Router ---> HUB-A ---> HUB-B ---> RPi1B ---> USB Flash Memory

6. Again using the RPi3B+ Stretch desktop manager connected to the samba share of NAS (as described in B)
7. Selected an 8GB file from the NAS samba share and directly copied it to the USB samba share of RPi1B
8. Copy completed in about 65 minutes... no errors

8GB Route: RPi3B+ ---* WiFi Router ---* HUB-A ---* NAS ---> HUB-A ---> HUB-B ---> RPi1B ---> USB Flash Memory

Copying 4GB file from RPi3B+ desktop and an 8GB from the NAS samba share to the USB Flash memory shared over samba on RPi1B server did not produce any error or freezes.

The RPi1B was also accessed via VNC from RPi3B+ during the test...

....maybe am just lucky......
"Don't come to me with 'issues' for I don't know how to deal with those
Come to me with 'problems' and I'll help you find solutions"

Some people be like:
"Help me! Am drowning! But dont you dare touch me nor come near me!"

ejolson
Posts: 3547
Joined: Tue Mar 18, 2014 11:47 am

Re: IngoKnito's Pi1+USB+Samba Problem

Fri Jul 27, 2018 4:59 pm

LTolledo wrote:
Fri Jul 27, 2018 10:22 am
....maybe am just lucky......
It always helps to be lucky.

I think this may be an SMB protocol negotiation incompatibility. In the early days of Windows networking, my boss was fond of saying "at Microsoft we're not done until Novel won't run." Note, he was being sarcastic and did not work for Microsoft.

From what I understand, recent changes to Windows 10 introduces SMB version 3.1.1 along with an apparent incompatibility in the way Linux systems negotiate which protocol to use. Could something similar be happening here? Is the laptop that has difficulty uploading files to the Samba share running Windows?

Maybe it is possible to force the correct protocol version in the smb.conf file on the Pi or install additional Microsoft networking components to support a different SMB version on the laptop.

LTolledo
Posts: 1942
Joined: Sat Mar 17, 2018 7:29 am
Location: Anime Heartland

Re: IngoKnito's Pi1+USB+Samba Problem

Fri Jul 27, 2018 11:17 pm

Oooops I didnt try windows 10 client to RPi1B host.....

....let me try again..... (as the song goes)

I made a mistake declaring the video file as 4GB when its actually 5.5GB

Just to make it short.....

No changes in RPi1B setup, Kodi still running in the background during file copy.
No configuration changes made in Win10PC. (an old gaming laptop with I7-720QM processor). Ethernet cable connection to HUB-A

5.5GB Route: Win10 PC ---> HUB-A ---> HUB-B ---> RPi1B ---> USB Flash Memory

The 5.5GB file copy completed in under 30 minutes.... no errors

I can test it on a slower Win10PC (AMD E-350 processor ) but I doubt the results will change....
"Don't come to me with 'issues' for I don't know how to deal with those
Come to me with 'problems' and I'll help you find solutions"

Some people be like:
"Help me! Am drowning! But dont you dare touch me nor come near me!"

IngoKnito
Posts: 12
Joined: Mon Jun 25, 2018 8:20 am

Re: IngoKnito's Pi1+USB+Samba Problem

Thu Aug 16, 2018 5:47 am

Probably is the FAT-Format the reason for this issue?!
No, I cannot format the USB device with NTFS.

Hopefully the next OS-Version helps...

LTolledo
Posts: 1942
Joined: Sat Mar 17, 2018 7:29 am
Location: Anime Heartland

Re: IngoKnito's Pi1+USB+Samba Problem

Thu Aug 16, 2018 10:13 am

Ok so its FAT32 then.

Again just to make it short...

Aside from the change in USB Flash memory (now a FAT32 formatted 16GB ) there were no other changes in the RPi1B setup, Kodi still running in the background during file copy.
No configuration changes made in Win10PC. (an old gaming laptop with I7-720QM processor). Ethernet cable connection to HUB-A

File Copy Route: Win10 PC ---> HUB-A ---> HUB-B ---> RPi1B ---> USB Flash Memory

220MB file copy completed in under a minute.... no errors
540MB file copy had errors at first (citing network problem), but on second try completed in 3 minutes, no other errors reported.

Getting to write larger than 540MB gave me errors.....
even after properly setting the ownership and full access rights... error remains

Why cant you format it in NTFS or EXT4?

As a follow-up test, I tried copying a 1.2GB file from windows share to RPi1B

from raspbian desktop use file manager to access win10 share
from the windows share, select 1.2GB single movie file
paste the 1.2GB file to FAT32 formatted 16GB USB stick plugged to RPi1B's USB port
file copy finished in about 10 minutes, no errors reported by raspbian
"Don't come to me with 'issues' for I don't know how to deal with those
Come to me with 'problems' and I'll help you find solutions"

Some people be like:
"Help me! Am drowning! But dont you dare touch me nor come near me!"

IngoKnito
Posts: 12
Joined: Mon Jun 25, 2018 8:20 am

Re: IngoKnito's Pi1+USB+Samba Problem

Fri Aug 17, 2018 4:43 am

Now i've bought a PI3+ and the issue has gone! The filetransfer workes now without any errors.
Problem solved :geek:

I cannot format the USB-Device, because it's the device (it'an Garmin) does not support any other filesystem for the embeded system.

So i use now the 3+ for this and my old PI i will use for another idea.
But i still think it's software error from the OS with the support of the FAT-filesystem via USB.

caerandir
Posts: 131
Joined: Tue Dec 18, 2012 11:26 am
Location: Bonn, Germany

Re: IngoKnito's Pi1+USB+Samba Problem

Sun Dec 02, 2018 10:48 pm

Hi all,

I am facing the same problem with my Raspberry 1 256 MB model, with an ext4 SATA drive attached via USB<-> SATA adapter. After ~64 MB the transfer of a file using Windows explorer fails. But also, accessing the same drive via another Linux box (a Le Potato running LibreELEC) via SMB protocol, the same effect happens when I watch a video file from the Raspberry drive. Interesting that it happens even when the transfer is really slow, like watching the video in real time!
The funny thing: It worked before. However, after trying several things, it just came to my mind that I changed the USB<->SATA adapter at some point. In the next days, I'll revert everything to the old adapter and will report if this solves the problem. This is the currently installed, supposedly faulty one (dmesg):

Code: Select all

[    3.425424] usb 1-1.3: New USB device found, idVendor=152d, idProduct=2336
[    3.435764] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=5
[    3.446343] usb 1-1.3: Product: JM20336 SATA, USB Combo
[    3.454798] usb 1-1.3: Manufacturer: JMicron
[    3.462121] usb 1-1.3: SerialNumber: 01FD88888888
Will keep you updated.

Cheers
- Caerandir

caerandir
Posts: 131
Joined: Tue Dec 18, 2012 11:26 am
Location: Bonn, Germany

Re: IngoKnito's Pi1+USB+Samba Problem

Tue Dec 04, 2018 7:28 pm

Hi all,

OK, I can confirm it is the USB<->SATA bridge. Put in the old one, and not only the data transfer rate is higher, it also copies the file rock-solid. Funny thing: same manufacturer (dmesg):

Code: Select all

[    4.093024] usb 1-1.2: new high-speed USB device number 4 using dwc_otg
[    4.234471] usb 1-1.2: New USB device found, idVendor=152d, idProduct=2338
[    4.244699] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=5
[    4.255205] usb 1-1.2: Product: USB to ATA/ATAPI bridge
[    4.263615] usb 1-1.2: Manufacturer: JMicron
[    4.270952] usb 1-1.2: SerialNumber: 000000000000
But still, different product.

Will see if I can find out who's "responsible" for the driver - I'd say this is not a Raspberry but a general Unix driver problem. Anyone knows where I should write to from the top of her/his head?

Thanks!

Caerandir

DirkS
Posts: 9936
Joined: Tue Jun 19, 2012 9:46 pm
Location: Essex, UK

Re: IngoKnito's Pi1+USB+Samba Problem

Tue Dec 04, 2018 7:49 pm

caerandir wrote:
Tue Dec 04, 2018 7:28 pm
Funny thing: same manufacturer (dmesg):
...
But still, different product.
Nothing new there. @HawaiianPi was writing something similar the other day
viewtopic.php?t=227600
viewtopic.php?p=1372790#p1372790

caerandir
Posts: 131
Joined: Tue Dec 18, 2012 11:26 am
Location: Bonn, Germany

Re: IngoKnito's Pi1+USB+Samba Problem

Tue Dec 04, 2018 8:17 pm

Hi DirkS,

agreed, same manufacturer does not mean it will work... was just a remark, not an expectation.

However, things sre getting weirder: I re-attached the allegedly faulty bridge for gathering troubleshooting data, and - lo and behold - error's gone! Copy works like a charm. Two differences to situation before: 1. Raspberry not running for days but just minutes, and 2. another Raspberry every minute accesses the SATA disk via NFS share, which was off during my tests. I just restarted it, but as of now the error is not reproducible.

I will keep an eye on things the next days and see if it is kind of a "creeping" bug that builds up over uptime; if so, will try with the other bridge, and if so also there, will switch the other Raspberry to access the drive via samba also and uninstall the nfsserver to see if it is some strange interaction between samba and nfs.

Will keep posting here, but may be that these tests will take a few days - expect delayed postings :-)

Any insights welcome in the meantime.

Cheers
Caerandir

caerandir
Posts: 131
Joined: Tue Dec 18, 2012 11:26 am
Location: Bonn, Germany

Re: IngoKnito's Pi1+USB+Samba Problem

Sun Dec 16, 2018 9:41 pm

Hi all,

I swear on my grandmothers beard that I had the problem as described above, and it persisted across reboots, cable changes and whatnot, but now it's gone. The Raspberry is up and running without interruption since my last post, and I can happily copy files of any size.
I'm a bit at a loss, but after all: Who cares...

Sorry, cannot offer any solution...

Cheers

Caerandir

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