Oliver I'd love to test your patch - theres only one catch - I haven't a clue how to begin to do that. I managed to install LUbuntu 20.04.1 but applying source patches to the kernel is a bit beyond my skill level. PS out of curiosity why 'k' for doesn't support Write Same? D. -----Original Message----- From: Oliver Neukum [mailto:oneukum@xxxxxxxx] Sent: 11 November 2020 11:44 To: David C. Partridge; linux-usb@xxxxxxxxxxxxxxx Subject: Re: Issues with LaCie USB3 drive and UAS Am Montag, den 09.11.2020, 15:21 +0000 schrieb David C. Partridge: > Update: I found out how to do it! > > Created /etc/modprobe.d/blacklist_uas.conf containing text: > > options usb-storage quirks=059f:105f:u > > followed by: update-initramfs -u > and rebooted. > > Now the device works fine and mkfs.ext4 finishes in seconds rather than hours. Hi, this is good for now. Could you test the attached patch and replace the "u" in your module options for usb-storage with a "k" (for the new quirk)? Regards Oliver
