UAS support for smartmontools

[tgape]

I have a 3 TB Seagate Expansion portable USB 3.0 hard disk:
​https://usb-ids.gowdy.us/read/UD/0bc2/231a

, model should be STEA3000400 (as found in an XML file which came inside the hard disk when I bought it)
with the suffix SRD0NF1 I guess (from the sticker in the back of the hard disk)

With UAS enabled I can see info with -d scsi (-d sat{,12} doesn't work), but SMART info is not available:

 # smartctl -d scsi -i /dev/sdb
smartctl 6.6 2017-11-05 r4594 [x86_64-linux-4.14.15-1-ARCH] (local build)
Copyright (C) 2002-17, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Vendor:               Seagate
Product:              Expansion
Revision:             0708
Compliance:           SPC-4
User Capacity:        3,000,592,981,504 bytes [3.00 TB]
Logical block size:   512 bytes
Physical block size:  4096 bytes
LU is fully provisioned
Logical Unit id:      0xXXXXXXXX
Serial number:        XXXXXXXX
Device type:          disk
Local Time is:        Sun Jan 28 11:28:14 2018 WET
SMART support is:     Unavailable - device lacks SMART capability.

If I blacklist UAS, then I get from smartctl:

 # smartctl -i  /dev/sdb 
smartctl 6.6 2017-11-05 r4594 [x86_64-linux-4.14.15-1-ARCH] (local build)
Copyright (C) 2002-17, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     Seagate Barracuda 2.5 5400
Device Model:     ST3000LM024-2AN17R
Serial Number:    XXXXXXXXX (Note from me: This serial number doesn't match the serial number retrieved with -d scsi and UAS enabled! The UAS enabled serial number is the correct one from the sticker.)
LU WWN Device Id: X XXXXXX XXXXXXXXXX
Firmware Version: 0001
User Capacity:    3,000,592,982,016 bytes [3.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    5526 rpm
Form Factor:      2.5 inches
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ACS-3 T13/2161-D revision 5
SATA Version is:  SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Sun Jan 28 11:26:13 2018 WET
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

I wonder if it's possible to get SMART access without blacklisting UAS. I don't like the "very big device" messages I receive in dmesg and I guess the device will perform better with UAS enabled (Kernel 4.14.15-1 from Archlinux X86_64).

kern  :info  : [  +4.501957] usbcore: registered new interface driver usb-storage
kern  :info  : [  +4.470776] usb 4-1.4: new high-speed USB device number 12 using ehci-pci
kern  :warn  : [  +0.179453] usb 4-1.4: UAS is blacklisted for this device, using usb-storage instead
kern  :info  : [  +0.000009] usb-storage 4-1.4:1.0: USB Mass Storage device detected
kern  :info  : [  +0.000262] usb-storage 4-1.4:1.0: Quirks match for vid 0bc2 pid 231a: 800000
kern  :info  : [  +0.000134] scsi host7: usb-storage 4-1.4:1.0
kern  :info  : [  +0.574103] usbcore: registered new interface driver uas
kern  :notice: [  +0.437323] scsi 7:0:0:0: Direct-Access     Seagate  Expansion        0708 PQ: 0 ANSI: 6
kern  :notice: [  +0.022529] sd 7:0:0:0: Attached scsi generic sg2 type 0
kern  :notice: [  +4.367035] sd 7:0:0:0: [sdb] Very big device. Trying to use READ CAPACITY(16).
kern  :notice: [  +0.000439] sd 7:0:0:0: [sdb] 5860533167 512-byte logical blocks: (3.00 TB/2.73 TiB)
kern  :notice: [  +0.000017] sd 7:0:0:0: [sdb] 4096-byte physical blocks
kern  :notice: [  +0.001065] sd 7:0:0:0: [sdb] Write Protect is off
kern  :debug : [  +0.000006] sd 7:0:0:0: [sdb] Mode Sense: 47 00 00 08
kern  :notice: [  +0.001162] sd 7:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
kern  :notice: [  +0.001110] sd 7:0:0:0: [sdb] Very big device. Trying to use READ CAPACITY(16).
kern  :notice: [  +0.072621] sd 7:0:0:0: [sdb] Very big device. Trying to use READ CAPACITY(16).
kern  :notice: [  +0.002571] sd 7:0:0:0: [sdb] Attached SCSI disk

And just in case:

# lsusb -v -d 0bc2:231a                   
Bus 004 Device 010: ID 0bc2:231a Seagate RSS LLC Expansion Portable
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.10
  bDeviceClass            0 
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x0bc2 Seagate RSS LLC
  idProduct          0x231a Expansion Portable
  bcdDevice            7.08
  iManufacturer           1 Seagate
  iProduct                2 Expansion
  iSerial                 3 XXXXXXXX
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           85
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              500mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass         8 Mass Storage
      bInterfaceSubClass      6 SCSI
      bInterfaceProtocol     80 Bulk-Only
      iInterface              0