From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263605AbUACRy2 (ORCPT ); Sat, 3 Jan 2004 12:54:28 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263618AbUACRy2 (ORCPT ); Sat, 3 Jan 2004 12:54:28 -0500 Received: from ns.virtualhost.dk ([195.184.98.160]:26337 "EHLO virtualhost.dk") by vger.kernel.org with ESMTP id S263605AbUACRy1 (ORCPT ); Sat, 3 Jan 2004 12:54:27 -0500 Date: Sat, 3 Jan 2004 18:54:14 +0100 From: Jens Axboe To: Andrey Borzenkov Cc: Olaf Hering , Andries Brouwer , Greg KH , linux-hotplug-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org Subject: Re: removable media revalidation - udev vs. devfs or static /dev Message-ID: <20040103175414.GX5523@suse.de> References: <200401012333.04930.arvidjaar@mail.ru> <20040103133749.A3393@pclin040.win.tue.nl> <20040103124216.GA31006@suse.de> <200401031905.31806.arvidjaar@mail.ru> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200401031905.31806.arvidjaar@mail.ru> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Jan 03 2004, Andrey Borzenkov wrote: > > Is there really no way to get a media change notification from ZIP or > > JAZ drives? > > If anyone knows please tell me - I will put it into supermount ... > > AFAIK in case of SCSI this is impossible simply by virtue of protocol - SCSI > device is not initiator. So you need something to poll device for status. > That is usually done on device open except in this case you can't open > because you do not yet have handle. You could queue a media notification request for long periods of time, being completed by the drive when a media change happens. At least mmc allows for this, doubt anyone has ever done it. So yeah, poll... -- Jens Axboe