Dear Tejun, the subject Samsung SSD is having performance issues with "old data" which Samsung now addresses with a new firmware. As often is the case, Linux users find it a bit more difficult to apply that fix. However, I also have a Windows system, so it should be no big deal for me. But there is also a big concern for Linux users which this FW version seems to introduce. The link below points to a warning (backed by others, elsewhere on the web) that fstrim in combination with this FW will wreck your drive. http://www.overclock.net/t/1507897/samsung-840-evo-read-speed-drops-on-old-written-data-in-the-drive/2640%23post_23827674 (search for fstrim) I raised this in a discussion thread of the Ubuntu MATE community and was pointed to the SSD blacklist that is part of the module libata-core.c which names you as the maintainer. I wonder if you could take a look at this issue - maybe you want to add the device to the blacklist thereafter if need be. If you find the time and find this worthwhile to investigate I would appreciate a brief notification of the outcome. For now I am holding back the FW update. Best regards Guenter Waller -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
