From: Alan Stern <stern@rowland.harvard.edu>
To: "Till Dörges" <doerges@pre-sense.de>
Cc: linux-usb@vger.kernel.org
Subject: Re: Ext. HDDs not working under Linux via USB 3.0 but under Windows
Date: Sun, 24 May 2020 10:34:31 -0400 [thread overview]
Message-ID: <20200524143431.GA3275@rowland.harvard.edu> (raw)
In-Reply-To: <816c9c46-6845-e09f-9c67-ecd2427eb9c4@pre-sense.de>
On Sun, May 24, 2020 at 09:46:06AM +0200, Till Dörges wrote:
> Am 23.05.20 um 22:33 schrieb Alan Stern:
>
> >>>> I'm trying to get external HDDs from Sony to work under Linux with USB 3.0.
> >> [...]
> >>>> - PSZ-HA2T: idVendor=054c, idProduct=087d
> >>>> - PSZ-HA1T: idVendor=054c, idProduct=087d
> >>>> - PSZ-HA50: idVendor=054c, idProduct=087d
> >>>> - PSZ-HC1T: idVendor=054c, idProduct=0c4f
> [...]
> >> Because with setting the f flag (via options usb-storage quirks=054c:087d:f) the
> >> PSZ-HA*1*T starts behaving nicely.
> [...]
> >> The PSZ-HA*2*T, however, still doesn't work with that.
> [...]
> > That device seems to be behaving so badly, it's hard to tell what the
> > underlying problem is.
> >
> > I'd start by blacklisting the device for UAS, so forcing it to use
> > usb-storage, which is a somewhat simpler protocol. Next, you should
> > collect a usbmon trace showing what happens when you plug in the
> > PSZ-HA2T. That will tell us what's going on, even if it doesn't suggest
> > a way to work around the problems.
> >
> > (The instructions for usbmon are in the kernel source file
> > Documentation/usb/usbmon.rst.)
>
> Thanks. Will give that a shot.
>
>
> Is there any way to differentiate between devices other than vendor and product ID?
>
> Because the PSZ-HA1T (which seems to be working thanks to your help) and the PSZ-HA2T
> (which still refuses to work) have the *same* vendor and product ID.
There's also the bcdDevice value. It is ignored for quirks specified by
the "quirks=" module parameter, but it is used for quirks stored in the
unusual_devs.h or unusual_uas.h files in the kernel source code.
Alan Stern
next prev parent reply other threads:[~2020-05-24 14:34 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-23 14:57 Ext. HDDs not working under Linux via USB 3.0 but under Windows Till Dörges
2020-05-23 15:48 ` Alan Stern
2020-05-23 20:05 ` Till Dörges
2020-05-23 20:33 ` Alan Stern
2020-05-24 7:46 ` Till Dörges
2020-05-24 14:34 ` Alan Stern [this message]
2020-06-17 16:02 ` Till Dörges
2020-06-17 16:37 ` Alan Stern
2020-06-18 6:07 ` Till Dörges
2020-06-18 7:30 ` Till Dörges
2020-06-19 12:07 ` Till Dörges
2020-06-19 15:05 ` Alan Stern
2020-06-19 18:01 ` Till Dörges
2020-08-25 18:45 ` Alan Stern
2020-08-26 11:51 ` Till Dörges
2020-08-26 14:28 ` Alan Stern
2020-08-26 14:32 ` [PATCH] usb: storage: Add unusual_uas entry for Sony PSZ drives Alan Stern
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