Date: Fri, 08 Feb 2002 22:49:08 -0500 (EST) From: John Baldwin <jhb@FreeBSD.org> To: =?ISO-8859-1?Q?G=E9rard_Roudier?= <groudier@free.fr> Cc: FreeBSD Hackers Mailing List <hackers@FreeBSD.ORG>, FreeBSD Hardware Mailing List <hardware@FreeBSD.ORG>, Oliver Fromme <olli@secnetix.de>, "Eugene M. Kim" <gene@nttmcl.com>, Terry Lambert <tlambert2@mindspring.com>, Josef Karthauser <joe@tao.org.uk> Subject: Re: USB "Memorybird" quirks Message-ID: <XFMail.020208224908.jhb@FreeBSD.org> In-Reply-To: <20020207193911.U1513-100000@gerard>
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On 07-Feb-02 Gérard Roudier wrote: > > On Thu, 7 Feb 2002, Josef Karthauser wrote: > >> On Thu, Feb 07, 2002 at 03:52:26PM -0800, Terry Lambert wrote: >> > > >> > > IIRC this problem is being addressed at a more fundamental level on >> > > -current, by adding a 6-byte-to-10-byte READ command translator >> > > somewhere in the abstraction layer. >> > >> > Could this be "auto-quirked"? >> > >> >> As in, try a 6 byte command, and if that fails try a 10 byte command >> instead? >> >> Unfortunately although I'm maintaining USB in -current, I don't have a >> complete in depth understanding of the code yet. :( I'm mainly trying >> to fix my problems by taking from NetBSD. > > A couple of READ/WRITE 6 byte commands are still mandatory for SCSI block > devices in order to accomodate softwares as boot software for example that > may not be upgradable on systems still in use. Softwares that are > maintained should no longer use 6 byte commands, but use the 10 byte > commands replacement (for years...). Just so you know, I made the umass driver for UFI and ATA translate SCSI 6 byte commands to 10 byte commands. There is a simple function call to do the change if you wish to do this in for the SCSI transforms as well. As far as axeing 6 byte commands all together, I will plead ignorance and defer to the scsi@ list and CAM folks. -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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