Date: Sun, 25 Jan 2009 21:24:06 +0100 From: Hans Petter Selasky <hselasky@c2i.net> To: freebsd-current@freebsd.org Cc: Peter Jeremy <peterjeremy@optushome.com.au> Subject: Re: Prblem whit USB in FreeBSD 8 Message-ID: <200901252124.10886.hselasky@c2i.net> In-Reply-To: <497CC3C4.1070708@FreeBSD.org> References: <c321c71d0901240614i59258744g9eeb8d342da90662@mail.gmail.com> <20090125063441.GC1755@server.vk2pj.dyndns.org> <497CC3C4.1070708@FreeBSD.org>
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On Sunday 25 January 2009, Maxim Sobolev wrote: > Peter Jeremy wrote: > > On 2009-Jan-24 12:30:56 -0800, Maxim Sobolev <sobomax@freebsd.org> wrote: > >> I wonder if this situation can be handled automatically. To my ignorant > >> view, our USB mass storage driver can try sending "synchronize cache" > >> command and if that fails then failback to the NO_SYNCHRONIZE_CACHE > >> behavior. > > > > This has been discussed in the past. The problem is that some drives > > lock up when you send a "synchronize cache" command so this isn't a > > general solution. > > So what? The drive that is not in the quirks won't work anyway, so that > if by auto-detection you can make at least fraction of those drivers > working out of the box it would be an improvement. I wonder how other > operating systems (Windows, Linux) cope with this issue. Not sure about > a Linux, but I really doubt Windows has anything like our quirks, yet > all drives work with it. > Hi, I was thinking about moving the mass storage quirks into the usb2_quirk module so that they can be set by "usbconfig". To some extent I agree that we should try to make things work out of the box. What I could easily do is to add a sysctl which you can set that automatically turns on the most common Mass Storage quirks for all USB Mass Storage Devices plugged. What do you think? --HPS
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