From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtpout17.a1.net (smtpout17.a1.net [194.48.128.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 87E7232E128 for ; Sat, 26 Sep 2026 20:45:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=194.48.128.1 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790455548; cv=none; b=eSDwUCEG5/8FRn5B00YO3uM+cJA80Wb9xEbo9qP9BWGsMwUxccgqUnIdUrsNvnuSss5SWiH+TEu0yhsw6yCuhT2ZNtwQ7jj9xNK3B03stgkxJ129vrcnWQNUixCvx+10HABcntK7As9JBsV4cwMp1WwomYm+etCv1MX0kG3PJjE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790455548; c=relaxed/simple; bh=3+n39fNnQtk8CI/6hGOJPOoIxd/FLI7tz8anfFIy14E=; h=Subject:References:To:From:Message-ID:Date:MIME-Version: In-Reply-To:Content-Type; b=s8eSFjx/6wJvWGPG37fFo+xykO/JCzuX8Q0wW46UKHb1H6zVLqQ0R7870vSzWmxKZ8Jo0jrC55ILRt1R3ts1dFL/6OAyz7tdE3aUvHC3OWlhARwt4T59qBDMp+/KreeCGpYuzX5FSb2EutoA4YZZuTP86pqQRBKuKFz+uo/7FhU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=a1.net; spf=pass smtp.mailfrom=a1.net; dkim=pass (4096-bit key) header.d=a1.net header.i=@a1.net header.b=PJqJP+8i; arc=none smtp.client-ip=194.48.128.1 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=a1.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=a1.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (4096-bit key) header.d=a1.net header.i=@a1.net header.b="PJqJP+8i" Received: from [192.168.0.6] (unknown [100.64.124.178]) by smtpout17.a1.net (Postfix) with ESMTPSA id 4hsfjD1l9lzGrqnq for ; Sat, 26 Sep 2026 22:45:36 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=a1.net; s=resmail1; t=1790455536; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=/krdb+n32+wzjLy/vrJU96ajzzr1DQvaDARb9SXdQ90=; b=PJqJP+8iJSx/en4Vh3jY67bGeEUdn617Ccbuq/DvHnPRvFDxlvtubzR2utZn9NBknUbfw5 rK/qRCX8rQYekft2RKcQm1Dl99eQUQT4AAaF3JbSsrvkELN1sUsiX0M5kKBfJady0waQXJ RFgRhD1tac9Er8Qz7VBAB26pZe00bd8qOZc4Q45EMsH1wRkUUne39qbsDQswsDl58bOY0l G91oiYi5AqjBJYKl4cG5iZrKjQ4yEE5MXpfht2RMS7Ba28IZ7CybyO2+zDqwpBeBBXHCuT JeLUwqa982PKcPvzE0HGQXZpdht1oji/6LBM6h3MTAP2NcfuFMc+/Exd3A7zqNdpgiVJy1 gd3s3vkvk20yDkDGHf3UcrfCFEH4KM/+gxgBKRbV47RGEL8HAgKzNdeiSfpHxOPyifkYzY i1oH9UOIguLAJdcfH2FKN6dj+wacZ1S8Fj2M+5dYHhixwawyUmQrH/9zN+5UGMcZHXW5q7 DQfOSw9q/NIkz9Yl0gSc/ASleS/spfDWmEVp5E+d+3hk0rckZSGgyt7I5bdmlhYKMPE+ma MnkdfRLZtFR4d8a0Ty8rZhOCtBkBCOuKMs8riH3OaNC3+ms671/QXXC3B7J0T5xyPfmLFT UEiU10FUwchS/1GohGNXHqHpxsZBHolFUOJoBEhASMk5fyl4fzIYs= Subject: Re: possible regression in usb-storage? References: <18c4b811-e91e-c163-fe1f-ee081a00602e@a1.net> <28d1f995-5e4b-4d01-aad4-6c5626e51e29@rowland.harvard.edu> <5ab3e86c-f209-ca72-58e7-8ea56225775b@a1.net> <605c0845-cfd4-0702-4322-53d9c8037b70@a1.net> <7e2440cb-41aa-3429-fb6f-b0f4cf761029@a1.net> <986f81b9-c195-4ef4-8176-ca69a8f506c4@rowland.harvard.edu> <04f165bc-e79e-4ef4-1f22-d4ad086c3ffb@a1.net> <0a83299e-c9db-46fb-a4ee-85b4e861f5d4@rowland.harvard.edu> To: linux-usb@vger.kernel.org From: Johann Klammer Message-ID: Date: Sat, 26 Sep 2026 22:44:42 +0200 User-Agent: Mozilla/5.0 (X11; Linux i686; rv:68.0) Gecko/20100101 Thunderbird/68.9.0 Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In-Reply-To: <0a83299e-c9db-46fb-a4ee-85b4e861f5d4@rowland.harvard.edu> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Spam-Level: On 9/26/26 4:46 PM, Alan Stern wrote: > > Don't know what you mean by that question. If you're referring to > the packet size for endpoint 0 and the device is running at High Speed > (USB 2, 480 Mb/s) or below, the answer is No. SuperSpeed (USB 3, 5000 > Mb/s or above) has a maximum packet size for endpoint 0 of 512 bytes. > But transfers can contain multiple packets. > > At this point I don't see any reasonable explanation for the difference > in behavior you're observing. My best recommendation is that you try a > bunch of different kernel versions between 4.9 and 6.9 to pin down > exactly at what stage things stopped working. A git bisection could > then zero in on the exact commit responsible for the change. > > Alan Stern > It seems that my power supply is unstable. I had a dvb stick and another hdd(selfpowered) plugged in, and with both disconnected the drive comes up ok with and without the quirks(except for a cache consistency message when unplugging). Plugging in the second hdd with the seagate mounted gives me `critical target errors`in dmesg. Plugging in just the dvb stick with seagate mounted gives no disk errors but unplugging and replugging the drive it won't come up. Sorry..