On Wed, Mar 14, 2018 at 10:52:36AM +0100, Oliver Neukum wrote: > Am Dienstag, den 13.03.2018, 12:50 +0100 schrieb Kashyap Chamarthy: > > Earlier, I didn't know which list to email, so I wrote to Martin K. > > Petersen (who pointed me to the lists when I asked where I can post > > publicly), and he made this observation on the above quoted text: > > > > "Linux can run USB block devices in either legacy or UAS mode. > > Chances are this device is being driven in usb-storage mode. We > > usually have quirks based on the model strings that decide whether > > to use one or the other." > > Neither driver would edit commands or result to that degree. > Whether UAS or storage are used dmesg will tell you. I see. So I ran `dmesg -w`, as I attached the disk & see the following: ----------------------------------------------------------------------- [...] [474027.606253] sd 3:0:0:0: Attached scsi generic sg1 type 0 [474027.607751] sd 3:0:0:0: [sdb] 976773168 512-byte logical blocks: (500 GB/466 GiB) [474027.607857] sd 3:0:0:0: [sdb] Write Protect is off [474027.607858] sd 3:0:0:0: [sdb] Mode Sense: 43 00 00 00 [474027.608019] sd 3:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [474027.612347] sd 3:0:0:0: [sdb] Attached SCSI disk [474027.863216] EXT4-fs (sdb): recovery complete [474027.866955] EXT4-fs (sdb): mounted filesystem with ordered data mode. Opts: (null) [474038.146095] usb 3-1: USB disconnect, device number 4 [474038.147543] print_req_error: I/O error, dev sdb, sector 0 [474038.155354] sd 3:0:0:0: [sdb] Synchronizing SCSI cache [474038.175128] print_req_error: I/O error, dev sdb, sector 0 [474038.179130] print_req_error: I/O error, dev sdb, sector 0 [474038.183135] print_req_error: I/O error, dev sdb, sector 0 [474038.183156] print_req_error: I/O error, dev sdb, sector 0 [474038.267134] sd 3:0:0:0: [sdb] Synchronize Cache(10) failed: Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK [474076.230377] usb 3-1: new SuperSpeed USB device number 5 using xhci_hcd [474076.248589] usb 3-1: New USB device found, idVendor=04e8, idProduct=61f5 [474076.248593] usb 3-1: New USB device strings: Mfr=2, Product=3, SerialNumber=1 [474076.248596] usb 3-1: Product: Portable SSD T5 [474076.248598] usb 3-1: Manufacturer: Samsung [474076.248600] usb 3-1: SerialNumber: 1234567A7AD6 [474076.254990] scsi host3: uas [474076.255605] scsi 3:0:0:0: Direct-Access Samsung Portable SSD T5 0 PQ: 0 ANSI: 6 [474076.263707] sd 3:0:0:0: Attached scsi generic sg1 type 0 [474076.264140] sd 3:0:0:0: [sdb] 976773168 512-byte logical blocks: (500 GB/466 GiB) [474076.264220] sd 3:0:0:0: [sdb] Write Protect is off [474076.264222] sd 3:0:0:0: [sdb] Mode Sense: 43 00 00 00 [474076.264546] sd 3:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [474076.267595] sd 3:0:0:0: [sdb] Attached SCSI disk [474076.463067] EXT4-fs (sdb): recovery complete [474076.463070] EXT4-fs (sdb): 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
