Extremely slow transfer speeds when copying/moving to an encrypted file container on external storage.

[Timothy Foster]

Hi,

I am new to the forums, but have been using Veracrypt for years. I am experiencing extremely slow transfer speeds when attempting to copy or move files to an encrypted file container on an external storage device.

Tech details:

Machine
* Apple M1 Max
* Ventura 13.1
* Memory: 32GB

External storage device
* QNAP TR004
* Firmware 1.1.1
* Configuration: RAID5
* Drives: WD Red Pro 12TB, 7200 RPM, 256 MB Cache.
* Connection: usb 3.1 (with an obvious bottleneck coming from the drives not being SSD)

I have never needed to create an encrypted file container over 500MB, but I am currently creating 5-6 TB containers and am experiencing speeds of 16.46 MB/sec while copying over files via Chronosync (essentially Rsync, and the files are configured to maximize transfer speeds). Originally, I had attempted to use Finder, but the speeds were even lower. What's interesting to note is, the speeds were averaging around 40-50 MB/sec at the beginning of the transfer, but have since slowed down to a crawl.

I tried some troubleshooting via directing the drive enclosure directly to my machine versus my hub, but the speeds stayed the same.

Does this sound normal given the specs I shared?

I'd appreciate any input any one could share.

Thank you.

[olddragon]

I can't offer any help, but I'd like to note that I face similar issues on Windows with large (5 TB or more) mounts using multiple external USB HDDs.

See my earlier post:
https://sourceforge.net/p/veracrypt/discussion/technical/thread/76027b406c/

[Timothy Foster]

Thanks! It is helpful to know that other users are experiencing the same issue.