On Wed, Mar 14, 2018 at 12:29:50PM +0100, Oliver Neukum wrote: > Am Mittwoch, den 14.03.2018, 11:22 +0100 schrieb Kashyap Chamarthy: > > I see. So I ran `dmesg -w`, as I attached the disk & see the following: > > UAS and no quirk for your device. It looks like it indeed just does > not support TRIM. Sorry, I didn't give you complete information — with the previous `dmesg` output, I actually attached the SSD (Samsung T5) via regular USB "A Cable". Now, I re-attached the SSD via the "Thunderbolt" port on my other laptop (Lenovo T470s), it _does_ show "UAS". Refer the arrow below: [...] [131839.680706] usb 4-1: new SuperSpeedPlus USB device number 2 using xhci_hcd [131839.698814] usb 4-1: New USB device found, idVendor=04e8, idProduct=61f5 [131839.698817] usb 4-1: New USB device strings: Mfr=2, Product=3, SerialNumber=1 [131839.698818] usb 4-1: Product: Portable SSD T5 [131839.698819] usb 4-1: Manufacturer: Samsung [131839.698820] usb 4-1: SerialNumber: 1234567A7AD6 [131839.701232] scsi host2: uas <------------------------------- [131839.701631] scsi 2:0:0:0: Direct-Access Samsung Portable SSD T5 0 PQ: 0 ANSI: 6 [131839.703470] sd 2:0:0:0: Attached scsi generic sg1 type 0 [131839.705486] sd 2:0:0:0: [sdc] 976773168 512-byte logical blocks: (500 GB/466 GiB) [131839.705895] sd 2:0:0:0: [sdc] Write Protect is off [131839.705900] sd 2:0:0:0: [sdc] Mode Sense: 43 00 00 00 [131839.706146] sd 2:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [131839.709656] sd 2:0:0:0: [sdc] Attached SCSI disk [131839.927167] EXT4-fs (sdc): recovery complete [131839.927175] EXT4-fs (sdc): mounted filesystem with ordered data mode. Opts: (null) [...] -- /kashyap -- 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
