Date: Sat, 5 Apr 2025 12:56:36 +0900 From: Tomoaki AOKI <junchoon@dec.sakura.ne.jp> To: Steve Kargl <kargls@comcast.net> Cc: Alexander Motin <mav@FreeBSD.org>, freebsd-current@freebsd.org Subject: Re: Samsung T7 external SSD support? Message-ID: <20250405125636.b078c4cdd3638a677af16494@dec.sakura.ne.jp> In-Reply-To: <591a0d84-a74a-4d8e-bd40-04475eb5b457@comcast.net> References: <39bd6092-4bd9-4086-b202-08b83b425fb5@comcast.net> <35d2361d-80e8-489a-bd9d-6c5ada5736b8@FreeBSD.org> <591a0d84-a74a-4d8e-bd40-04475eb5b457@comcast.net>
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On Fri, 4 Apr 2025 19:44:49 -0700 Steve Kargl <kargls@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. https://en.wikipedia.org/wiki/SCSI https://en.wikipedia.org/wiki/SCSI -- Tomoaki AOKI <junchoon@dec.sakura.ne.jp>home | help
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