Date: Sat, 5 Apr 2025 01:09:43 -0600 From: Warner Losh <imp@bsdimp.com> To: Tomoaki AOKI <junchoon@dec.sakura.ne.jp> Cc: Steve Kargl <kargls@comcast.net>, Alexander Motin <mav@freebsd.org>, FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: Samsung T7 external SSD support? Message-ID: <CANCZdfoF4Z6MovXcpd1w0HTjik8WPVtuhsSPY4x2mY%2B3Kyx6FA@mail.gmail.com> In-Reply-To: <20250405125636.b078c4cdd3638a677af16494@dec.sakura.ne.jp> References: <39bd6092-4bd9-4086-b202-08b83b425fb5@comcast.net> <35d2361d-80e8-489a-bd9d-6c5ada5736b8@FreeBSD.org> <591a0d84-a74a-4d8e-bd40-04475eb5b457@comcast.net> <20250405125636.b078c4cdd3638a677af16494@dec.sakura.ne.jp>
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[-- Attachment #1 --] On Fri, Apr 4, 2025, 9:57 PM Tomoaki AOKI <junchoon@dec.sakura.ne.jp> wrote: > 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. > 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 <junchoon@dec.sakura.ne.jp> > > [-- Attachment #2 --] <div dir="auto"><div><br><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Fri, Apr 4, 2025, 9:57 PM Tomoaki AOKI <<a href="mailto:junchoon@dec.sakura.ne.jp">junchoon@dec.sakura.ne.jp</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On Fri, 4 Apr 2025 19:44:49 -0700<br> Steve Kargl <<a href="mailto:kargls@comcast.net" target="_blank" rel="noreferrer">kargls@comcast.net</a>> wrote:<br> <br> > On 4/4/25 19:28, Alexander Motin wrote:<br> > > On 04.04.2025 21:45, Steve Kargl wrote:<br> > >> Anyone using a Samsung T7 external SSD with FreeBSD current?<br> > >><br> > >> If I plug the drive into a USB 2.0 port, I see<br> > >><br> > >> usb_msc_auto_quirk: UQ_MSC_NO_GETMAXLUN set for USB mass storage <br> > >> device Samsung PSSD T7 Shield (0x04e8:0x61fb)<br> > >> ugen0.2: <Samsung PSSD T7 Shield> at usbus0<br> > >> umass0 on uhub1<br> > >> umass0: <Samsung PSSD T7 Shield, class 0/0, rev 2.10/1.00, addr 47> on <br> > >> usbus0<br> > >> umass0: SCSI over Bulk-Only; quirks = 0x0100<br> > >> umass0:5:0: Attached to scbus5<br> > >> da0 at umass-sim0 bus 0 scbus5 target 0 lun 0<br> > >> da0: <Samsung PSSD T7 Shield 0> Fixed Direct Access SPC-4 SCSI device<br> > >> da0: Serial Number S6NPNS0Y201077Y<br> > >> da0: 40.000MB/s transfers<br> > >> da0: 1907729MB (3907029168 512 byte sectors)<br> > >> da0: quirks=0x2<NO_6_BYTE><br> > >><br> > >> However, the SSD is supposedly a USB 3.2 gen 2 device with a ~1000 MBps<br> > >> read/write speed.<br> > >><br> > >> When plugged into a USB 3.x port, I typically see<br> > >><br> > >> ugen0.2: <vendor 0x0507 product 0x0204> at usbus0<br> > >><br> > >> and the device is not listed with usbconfig. Repeatedly, unplugging the<br> > >> ssd and re-plugging it into the USB 3.x port, I eventually get the <br> > >> above dmesg output. Do I need a quirk for this SSD to get <br> > >> recognized? Also,<br> > >> shouldn't it connect with faster transfer rate than 'da0: 40.0MB/s'?<br> > > <br> > > 40MB/s exactly means the device connected to USB2 controller or at least <br> > > at USB2 speed. Considering that other times it does not connect at all, <br> > > I wonder if some signal quality issue or something else prevents it from <br> > > going proper USB3. IIRC USB3 uses completely different wires in the <br> > > connector. Also USB2 and USB3 can be handled by different controllers <br> > > with different drivers, so not detecting it still might be a software <br> > > issue, but I can't say much about that area.<br> > <br> > Thanks for confirming my suspension.<br> > <br> > I've tried two different cables. I have few more I can test.<br> > Unfortunately, I have to use a short USB 3.x extension cable<br> > as the port is on the motherboard under a table.<br> > <br> > -- <br> > steve<br> <br> Another unwanted possibility would be that controller mimic'ing SCSI<br> (As reported being "umass0: SCSI over Bulk-Only") is reporting as if<br> it's U2 or UW SCSI device.<br></blockquote></div></div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto">No. Reported speed doesn't matter. It's reported by the SIM and is a guess. For USB attached it doesn't change anything.</div><div dir="auto"><br></div><div dir="auto">Warner</div><div dir="auto"><br></div><div dir="auto"><div class="gmail_quote gmail_quote_container"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <br> <a href="https://en.wikipedia.org/wiki/SCSI" rel="noreferrer noreferrer" target="_blank">https://en.wikipedia.org/wiki/SCSI</a><br>; <br> <a href="https://en.wikipedia.org/wiki/SCSI" rel="noreferrer noreferrer" target="_blank">https://en.wikipedia.org/wiki/SCSI</a><br>; <br> <br> -- <br> Tomoaki AOKI <<a href="mailto:junchoon@dec.sakura.ne.jp" target="_blank" rel="noreferrer">junchoon@dec.sakura.ne.jp</a>><br> <br> </blockquote></div></div></div>home | help
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