From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261994AbTDKWmu (for ); Fri, 11 Apr 2003 18:42:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262000AbTDKWmt (for ); Fri, 11 Apr 2003 18:42:49 -0400 Received: from e3.ny.us.ibm.com ([32.97.182.103]:63617 "EHLO e3.ny.us.ibm.com") by vger.kernel.org with ESMTP id S261994AbTDKWms (for ); Fri, 11 Apr 2003 18:42:48 -0400 Date: Fri, 11 Apr 2003 15:56:34 -0700 From: Greg KH To: Steven Dake Cc: "Kevin P. Fleming" , linux-hotplug-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, message-bus-list@redhat.com Subject: Re: [ANNOUNCE] udev 0.1 release Message-ID: <20030411225634.GD3786@kroah.com> References: <20030411172011.GA1821@kroah.com> <200304111746.h3BHk9hd001736@81-2-122-30.bradfords.org.uk> <20030411182313.GG25862@wind.cocodriloo.com> <3E970A00.2050204@cox.net> <3E9725C5.3090503@mvista.com> <20030411204329.GT1821@kroah.com> <3E9741FD.4080007@mvista.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3E9741FD.4080007@mvista.com> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Apr 11, 2003 at 03:30:21PM -0700, Steven Dake wrote: > There is no "spec" that states this is a requirement, however, telecom > customers require the elapsed time from the time they request the disk > to be used, to the disk being usable by the operating system to be 20 msec. What defines the term, "request the disk to be used"? Slamming it into the SCSI tray? Mounting the device on the command line? I don't think you can spin up a scsi disk in 20msec today :) > Its even more helpful for their applications if the call that hotswap > inserts blocks until the device is actually ready to use and available > in the filesystem. What would it block from happening? The kernel? Userspace? I'm confused. thanks, greg k-h