Copying a large file from an USB 3 disk (NTFS or EXT4) to another one (UFS/FreeBSD) is a very slow process....

Mario Marietto marietto2008 at
Sun Nov 28 19:13:15 UTC 2021

yes,but it is on the same PC where I have installed freebsd. Can you give a
look at the rsync parameters ? Are they optimized ? Can I change some
parameters to improve the speed ?

Il giorno dom 28 nov 2021 alle ore 19:54 Franklin M. Siler <fsiler at>
ha scritto:

> Do you have a windows machine? Could you just copy it with SCP, NFS, or
> SMB?
> On Sun, Nov 28, 2021 at 12:39 Mario Marietto via rsync <
> rsync at> wrote:
>> Hello to everyone.
>> I'm copying a large file from a NTFS formatted disk to another
>> one,UFS/FreeBSD disk,both are removable disks attached to the USB 3 port.
>> The file is 200 GB large and it is copied very slowly. Why it is so slow ?
>> I don't know where to store my virtual machines. I tried to save them on
>> the ext4 disk because I wanted to share them easily between Linux and
>> FreeBSD but I've realized that when I mount the disk in FreeBSD after some
>> time it corrupts. I tried to store it on the NTFS disk but it happens the
>> same. So,now I'm on FreeBSD and I'm copying them to a dedicated UFS/FreeBSD
>> style disk,but as I said,the speed is very slow. How can I increase the
>> speed ?. Actually I'm using this command,because I want to resume the
>> uploading if it breaks at some point :
>> root at marietto:/mnt/da3p2/bhyve/Ubuntu # rsync -avAXEWSlHh
>> /mnt/da0p1/Backups/OS/bhyve/Ubuntu/im* . --no-compress --info=progress2
>> sending incremental file list
>> impish-cuda-11-4-nvidia-470.img
>> 2.13M 0% 9.49kB/s 6284:55:38
>> and : where do you save large files ? what's the procedure that you use
>> to copy large files with a decent speed ? Unfortunately under Linux is not
>> safe to use a RW ufs disk access. So,I'm out of solutions.
>> -
>> Mario.
>> --
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> --
> I sent this from my phone, so please pardon typos and brevity.

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