Thanks to this thread for helping me figure out why my SMARTS and hdparm was not working. The below links helped me solve my initial problem -
1. Explanation of SAT with UAS Linux with workarounds
2. Porting the fixes mentioned above on a RPi
I do have some more questions regarding UAS and USBMS as below -
Can anyone suggest how safe / unsafe it is to use UAS on a Seagate drive? Are there reported failures with UAS on Seagate which leads to data corruption? How Can i find out if my Seagate drive actually supports UAS without any problems (even when Linux says it does not) ?
I am setting up my home NAS on RPi4B with OMV5 using Seagate HDDs and wanted to enable SMARTS and APM using hdparm. Initially both were not working but after setting the quirks to override the default NO_ATA_1X flag (by omitting the u at the end of usb-storage.quirks in /boot/cmdline.txt) I was able to get both APM and SMARTS working.
I wanted to understand if there is any possibility my disks start failing because of using UAS. If so I can revert to :u to use USBMS and not UAS.
My Drives:
1 x Seagate Backup Plus Portable Drive USB 3.0 2TB
1 x Seagate Backup Plus Slim 2TB USB 3.0 External Hard Drive
2 x Seagate Backup Plus Hub 4TB External Hard Drive USB 3.0
Thanks in advance! 