Date: Thu, 22 Mar 2007 07:57:17 +0100 From: Gerhard Schmidt <estartu@augusta.de> To: Hidetoshi Shimokawa <simokawa@FreeBSD.org> Cc: freebsd-bugs@FreeBSD.org Subject: Re: kern/93083: [firewire] Detach of Firewire Harddisk not recognied properly Message-ID: <20070322065717.GA28832@augusta.de> In-Reply-To: <200703220248.l2M2mR7u020054@freefall.freebsd.org> References: <200703220248.l2M2mR7u020054@freefall.freebsd.org>
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--3V7upXqbjpZ4EhLz Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Mar 22, 2007 at 02:48:27AM +0000, Hidetoshi Shimokawa wrote: > Synopsis: [firewire] Detach of Firewire Harddisk not recognied properly >=20 > State-Changed-From-To: open->feedback > State-Changed-By: simokawa > State-Changed-When: Thu Mar 22 02:47:51 UTC 2007 > State-Changed-Why:=20 > USB has always tree structures and any devices except hubs > are leaves of the tree. This means that you can remove any device without > disconnecting any other devices. > On the other hand, ieee1394 allows daisy chains and you may sometimes > want to remove a device between the host and a leaf device which is > mounted on the host. The current default setting allow to remove physical= ly > such intermediate nodes without unmounting filesystems. =46rom my personal expirience that doesn't work. I had 3 external harddrive= s=20 connected via FW.=20 drive1 <-> host <-> drive2 <-> drive3=20 Disconnecting drive1 and drive3 while drive2 is mounted worked sometimes=20 (couldn't figure out what makes it fail)=20 umounting and powering down drive2 (without physicaly disconnecting) causes a panik when drive3 is mounted.=20 The only secure way to disconnect any drive at the moment is to unmount=20 any fw disk, disconnect the drive and remount the others. Everything=20 else worked sometimes but most time the system crashed.=20 As it seams to me that a busreset is triggerd by any disconnect or powerchange and this causes a renumbering of the devices and leads=20 to the crash.=20 At the moment i have ext Harddisk and a DVD-Writer with firewire and a=20 notebook with FreeBSD 6.2 and firewire. I can help you with testing.=20 Greeting=20 Estartu --=20 ---------------------------------------------------------------------------- Gerhard Schmidt | Nick : estartu IRC : Estartu | Fischbachweg 3 | | PGP Public Key 86856 Hiltenfingen | EMail: estartu@augusta.de | on request=20 Germany | | =20 --3V7upXqbjpZ4EhLz Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (FreeBSD) iQCVAwUBRgIozQzx22nOTJQRAQLYiAP/V/lpFTte4rIiI6l/rRlVZKp8yVZ6TxdN a82/duasCnreNCAkKMEy7wFBl6FWHsptY3yMJ9xY86hjwOeKzZ2ATbIwcc2JJUJk TzVWAmij54cPvSq+KbI1XcaIN3Si0nT54aRNjl5a6CI32rWoi9lK2ZZt15NIsYRJ iWA292WljvE= =cOOh -----END PGP SIGNATURE----- --3V7upXqbjpZ4EhLz--
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