On Fri, Apr 4, 2025, 9:57 PM Tomoaki AOKI <junch...@dec.sakura.ne.jp> wrote:
> On Fri, 4 Apr 2025 19:44:49 -0700 > Steve Kargl <kar...@comcast.net> wrote: > > > On 4/4/25 19:28, Alexander Motin wrote: > > > On 04.04.2025 21:45, Steve Kargl wrote: > > >> Anyone using a Samsung T7 external SSD with FreeBSD current? > > >> > > >> If I plug the drive into a USB 2.0 port, I see > > >> > > >> usb_msc_auto_quirk: UQ_MSC_NO_GETMAXLUN set for USB mass storage > > >> device Samsung PSSD T7 Shield (0x04e8:0x61fb) > > >> ugen0.2: <Samsung PSSD T7 Shield> at usbus0 > > >> umass0 on uhub1 > > >> umass0: <Samsung PSSD T7 Shield, class 0/0, rev 2.10/1.00, addr 47> > on > > >> usbus0 > > >> umass0: SCSI over Bulk-Only; quirks = 0x0100 > > >> umass0:5:0: Attached to scbus5 > > >> da0 at umass-sim0 bus 0 scbus5 target 0 lun 0 > > >> da0: <Samsung PSSD T7 Shield 0> Fixed Direct Access SPC-4 SCSI device > > >> da0: Serial Number S6NPNS0Y201077Y > > >> da0: 40.000MB/s transfers > > >> da0: 1907729MB (3907029168 512 byte sectors) > > >> da0: quirks=0x2<NO_6_BYTE> > > >> > > >> However, the SSD is supposedly a USB 3.2 gen 2 device with a ~1000 > MBps > > >> read/write speed. > > >> > > >> When plugged into a USB 3.x port, I typically see > > >> > > >> ugen0.2: <vendor 0x0507 product 0x0204> at usbus0 > > >> > > >> and the device is not listed with usbconfig. Repeatedly, unplugging > the > > >> ssd and re-plugging it into the USB 3.x port, I eventually get the > > >> above dmesg output. Do I need a quirk for this SSD to get > > >> recognized? Also, > > >> shouldn't it connect with faster transfer rate than 'da0: 40.0MB/s'? > > > > > > 40MB/s exactly means the device connected to USB2 controller or at > least > > > at USB2 speed. Considering that other times it does not connect at > all, > > > I wonder if some signal quality issue or something else prevents it > from > > > going proper USB3. IIRC USB3 uses completely different wires in the > > > connector. Also USB2 and USB3 can be handled by different controllers > > > with different drivers, so not detecting it still might be a software > > > issue, but I can't say much about that area. > > > > Thanks for confirming my suspension. > > > > I've tried two different cables. I have few more I can test. > > Unfortunately, I have to use a short USB 3.x extension cable > > as the port is on the motherboard under a table. > > > > -- > > steve > > Another unwanted possibility would be that controller mimic'ing SCSI > (As reported being "umass0: SCSI over Bulk-Only") is reporting as if > it's U2 or UW SCSI device. > No. Reported speed doesn't matter. It's reported by the SIM and is a guess. For USB attached it doesn't change anything. Warner > https://en.wikipedia.org/wiki/SCSI > > https://en.wikipedia.org/wiki/SCSI > > > -- > Tomoaki AOKI <junch...@dec.sakura.ne.jp> > >
