chill wrote:
>
> Maybe this explains why it is 50% faster than the previous SATA SSD
It doesn't. Both drives show up as identical devices with identical IDs
(is that possible?), and both are using the uas driver.
Code:
--------------------
tc@pCPServer:/usr/local/bin$ ./lsusb
Bus 002 Device 003: ID 174c:55aa ASMedia Technology Inc. ASM1051E SATA 6Gb/s
bridge, ASM1053E SATA 6Gb/s bridge, ASM1153 SATA 3Gb/s bridge, ASM1153E SATA
6Gb/s bridge
Bus 002 Device 002: ID 174c:55aa ASMedia Technology Inc. ASM1051E SATA 6Gb/s
bridge, ASM1053E SATA 6Gb/s bridge, ASM1153 SATA 3Gb/s bridge, ASM1153E SATA
6Gb/s bridge
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 0781:5583 SanDisk Corp. Ultra Fit
Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
tc@pCPServer:/usr/local/bin$ ./lsusb -t
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 5000M
|__ Port 1: Dev 2, If 0, Class=Mass Storage, Driver=uas, 5000M
|__ Port 2: Dev 3, If 0, Class=Mass Storage, Driver=uas, 5000M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/1p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
|__ Port 3: Dev 3, If 0, Class=Mass Storage, Driver=usb-storage, 480M
tc@pCPServer:/usr/local/bin$ ./lsusb -v -d 174c:55aa | grep -i interface
bDeviceClass 0 (Defined at Interface level)
bNumInterfaces 1
Interface Descriptor:
bInterfaceNumber 0
bInterfaceClass 8 Mass Storage
bInterfaceSubClass 6 SCSI
bInterfaceProtocol 80 Bulk-Only
iInterface 0
Interface Descriptor:
bInterfaceNumber 0
bInterfaceClass 8 Mass Storage
bInterfaceSubClass 6 SCSI
bInterfaceProtocol 98
iInterface 0
bDeviceClass 0 (Defined at Interface level)
bNumInterfaces 1
Interface Descriptor:
bInterfaceNumber 0
bInterfaceClass 8 Mass Storage
bInterfaceSubClass 6 SCSI
bInterfaceProtocol 80 Bulk-Only
iInterface 0
Interface Descriptor:
bInterfaceNumber 0
bInterfaceClass 8 Mass Storage
bInterfaceSubClass 6 SCSI
bInterfaceProtocol 98
iInterface 0
--------------------
So given that unmap is supported by the old Sandisk SATA drive on what
appears to be the same adapter, the fact that it's not supported on the
new Western Digital M.2 SATA drive is unlikely to be the fault of the
adapter.
------------------------------------------------------------------------
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View this thread: http://forums.slimdevices.com/showthread.php?t=113575
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