Date: Sun, 26 Sep 2004 10:36:44 +0930 From: Lucas James <Lucas.James@LDJcs.Com.Au> To: freebsd-current@freebsd.org Subject: Re: USB memory stick hotswap problems Message-ID: <200409261036.49484.Lucas.James@LDJcs.Com.Au> In-Reply-To: <20040926005943.GA61350@parodius.com> References: <41555396.4030009@fer.hr> <20040926021347.721a025f.benlutz@datacomm.ch> <20040926005943.GA61350@parodius.com>
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--nextPart2644352.oJSfmMxJ0x Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Sun, 26 Sep 2004 10:29 am, Jeremy Chadwick wrote: > Can't usbd (or better yet, usbd.conf) be modified or changed in some way > to automatically handle the unmounting of any existing filesystems that > match the device which is mounted? that won't work because usbd only gets the notification of something being= =20 unplugged *after* the fact, and it's too late to do unmounting then. And it can't be modified, because the kernel has no idea when the user is=20 going to yank out the cable. > Seems like we're eventually going to need this to make hot-swappable USB > devices more friendly. I understand why you must unmount a device > before SCSI CAM gets disconnected from it, but it just seems that this > should be a job for usbd. the only way you can ensure data integrity on user-removable devices is to= =20 mount them with -o sync. We should be telling the kernel at some point that this is a removable devi= ce,=20 and not have the kernel complain if we umount it when the device has alread= y=20 disappeared (assuming that we have mounted it with -o sync). Lucas James =2D-=20 The only possible interpretation of any research whatever in the `social sciences' is: some do, some don't. -- Ernest Rutherford --nextPart2644352.oJSfmMxJ0x Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.6 (FreeBSD) iD8DBQBBVhYpS5LuBv475s8RAlcEAKCnhphekybbPc7kaLFhpatuHaaIXgCgpYTa npTVKjqr4wjwz5o7bQaDJJU= =p3FG -----END PGP SIGNATURE----- --nextPart2644352.oJSfmMxJ0x--
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