On Mo, 2018-07-30 at 14:43 +0300, Mailing Lists wrote: > I cannot issue TRIM commands to SSD behind a JMS578-based sata to > usb-c adapter. Tried with Fedora 28 kernel and with latest > 4.18.0-0.rc6.git0.1.vanilla.knurd.1.fc28.x86_64 > lsblk -D shows that discard is not enabled, but the SSD has this > capability (see below) > > However Windows 10 successfully TRIMs the device. Also the > trimcheck.exe tool validates the TRIM operation. This makes me think > the linux uas driver needs additional reverse engineering or support > from Jmicron about this chipset. Hi, The VPD page for TRIM support should be 0xb0. Could you provide that? If all else fails: for each SCSI device (UAS devices internally are SCSI) there is a "provisioning_mode" attribute in sysfs. You can try to force TRIM to be used. https://gist.github.com/cathay4t/e80e02a737242a5f3824606543631bfe Strictly speaking this is a SCSI issue, not a UAS problem. HTH Oliver -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
