Bernhard

DDD, thanks for the feedback. Sounds like decrypting the system partition, switching to UEFI and reencrypting the partion is the way to go. I know this isn't really a VeraCrypt- related question, but since you mention disadvantages of UEFI mode: Any other reason (even if unrelated to VeraCrypt) for not switching over to UEFI?

Hi all, My PC with Windows 10 x64 21H2 still runs legacy BIOS (boot SSD uses MBR) and I'm contemplating switching over to UEFI by switching my boot drive to GPT. However I'm not sure, if I can do this with VeraCrypt System Encryption being active. My VeraCrypt version is 1.25.9 (64-bit). From what I read it is definitely not possible to switch to UEFI, if I have System Encryption with full drive encryption and that it "might" be possible, if only the system partition is encrypted, rather than the...

It's been several weeks now and after running that SSD from a powered USB hub, it's been rock-solid. I'd just like to say thank you for all your help. I very much appreciate all the time and effort you put into helping me with this issue, even when it was clear that this wasn't related to VeraCrypt at all. Thanks again, Bernhard

The PC manual as well as the data sheet unfortunately don't give any details about the USB 3.0 ports re. power output. Contacting Samsung support is a great idea, but before I do that. I'd like to gather a few more data points. Currently I'm testing with the powered USB 3.0 hub (power through the USB A to C cable). If that fails I can also test it with my powered USB 3.0 to SATA adapter ( https://www.amazon.com/gp/product/B005B3VO24/ ), which would also rule out cable and enclosure as a problem....

Thanks again for your super-fast response. Your question re. power requirement is a very valid one and I went back and checked the numbers. According to Samsung's data sheet the 850 Pro uses max. 3.5W, and that's for the 2TB version ( https://www.samsung.com/semiconductor/minisite/ssd/product/consumer/850pro/ ). Tom's Hardware measured 3W power consumption for the 1TB version ( https://www.tomshardware.com/reviews/samsung-850-pro-ssd-performance,3861-10.html ). My SSD is only 512 GB, so power consumption...

The SDD ist NOT powered by an external power adapter. I'm using a Satechi USB Type C enclosure ( https://www.amazon.com/gp/product/B01FWT2N3K ) and a Belkin USB-A to USB-C Cable (USB 3.1) that I bought in the Apple Store. Now I've removed the drive from the USB-3 type A port of my Lenovo W520 and connected it to my Anker 10 port USB hub ( https://www.amazon.com/gp/product/B005NGQWL2 ) and that is connected to a different USB port on the W520. So should I be using an enclosure with external power...

Things went well for a couple of nights, but today I had the same problem again (and once again event 98 in the Windows system log). :( So at this point I'm wondering, if this is a hardware problem - perhaps with that USB port - and if perhaps I should move the drive to a powered USB hub, which is connected to a different USB port on my computer. Thoughts on that or other suggestions?

Wow you're fast. :) :) :) Ok, PCI Link State Power Management now set to off. The Sleep settings were as you suggested, except for "Allow Wake timers", which was set to "Important wake timers only". ( I now remember changing that a few months ago, when I was trying out wake-on-LAN and never changed it back). I now changed that one to "Disabled" as well and will reboot for good measure. As usual I'll keep you posted of the results.