Hello Martin It seams, that those 2 ssds do not like ncq trim In the mail i sent to linux-ide I included 4 lines of code for the ata_device_blacklist in libata-core.c, but since Damien Le Moal suggested to me to write it to the maintainer of uas.c I didn't include those 4 lines... (ht thinks, that i could be because of the usb-adapter on those ssds) Those line where: { "Samsung Portable SSD T5", NULL, ATA_HORKAGE_NO_NCQ_TRIM | ATA_HORKAGE_ZERO_AFTER_TRIM, }, { "Samsung Portable SSD T3", NULL, ATA_HORKAGE_NO_NCQ_TRIM | ATA_HORKAGE_ZERO_AFTER_TRIM, }, But because this seams not to work, i can just say, that those ssds are suicidal, probably because of ncq trim. I hope, that this helps you to understand, what the problem is... Best regards Sven Hugi Am Mi., 19. Jan. 2022 um 04:20 Uhr schrieb Martin K. Petersen <martin.petersen@xxxxxxxxxx>: > > > Sven, > > > So, it seams, that there is a problem with the samsung t5 and t3, > > What, specifically, is the problem? > > -- > Martin K. Petersen Oracle Linux Engineering -- Sven Hugi github.com/ExtraTNT