From owner-freebsd-questions@FreeBSD.ORG Fri Jun 15 09:26:17 2012 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 0ECA1106564A for ; Fri, 15 Jun 2012 09:26:17 +0000 (UTC) (envelope-from mueller23@insightbb.com) Received: from mail.insightbb.com (smtp3.insight.synacor.com [208.47.185.25]) by mx1.freebsd.org (Postfix) with ESMTP id C78F58FC18 for ; Fri, 15 Jun 2012 09:26:16 +0000 (UTC) X_CMAE_Category: 0,0 Undefined,Undefined X-CNFS-Analysis: v=1.1 cv=+QzkXfe0R8oRsiyvwD5pBrXDRfGcOyX1E93NfMIywl8= c=1 sm=0 a=wCgxh-GooxwA:10 a=jLN7EqiLvroA:10 a=7o6BAiiPcsg9edVc7gEA:9 a=Q/oqmR4JO1zR3vNQamCQeQ==:117 X-CM-Score: 0 X-Scanned-by: Cloudmark Authority Engine Authentication-Results: smtp01.insight.synacor.com header.from=mueller23@insightbb.com; sender-id=softfail Authentication-Results: smtp01.insight.synacor.com smtp.mail=mueller23@insightbb.com; spf=softfail; sender-id=softfail Received-SPF: softfail (smtp01.insight.synacor.com: transitional domain insightbb.com does not designate 74.134.26.53 as permitted sender) Received: from [74.134.26.53] ([74.134.26.53:35053] helo=localhost) by mail.insightbb.com (envelope-from ) (ecelerity 2.2.2.40 r(29895/29896)) with ESMTP id 17/97-18914-61FFADF4; Fri, 15 Jun 2012 05:23:34 -0400 Date: Fri, 15 Jun 2012 05:23:34 -0400 Message-ID: <17.97.18914.61FFADF4@smtp01.insight.synacor.com> From: "Thomas Mueller" To: freebsd-questions@freebsd.org Cc: Gary Aitken Subject: USB device activity when not mounted X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 15 Jun 2012 09:26:17 -0000 > I can understand why I would see activity on a USB device when it's first plugged in. But why do I see continued activity (i.e. the light blinks on a usb disk or memory stick)? When I umount one of these, they keep being beat up on and it makes me nervous... At what point is it sync'd and safe to unplug? I assume when the umount returns, but what's going on after that? > Gary _______________________________________________ I had that problem/quirk with a SanDisk Cruzer 8 GB USB stick. Light would slowly blink in all OSes (FreeBSD, NetBSD, Linux) I use, but not in FreeDOS. This even happened before mounting and persisted after umounting. I just tested on the new computer, running FreeBSD 9.0-STABLE #10 amd64, got the slow blink even without mounting. No other USB sticks ever did this in my experience, though I can't speak for brands I've never used. USB sticks are not all created equal. One lot of Kingston Data Travelers would not work in NetBSD but were good in Linux and FreeBSD, and even FreeDOS and OpenIndiana on the new computer. Other USB sticks, including Kingston Data Travelers, worked in NetBSD as well as Linux and FreeBSD. But I was not able to install OpenIndiana on the new computer because it couldn't access a GPT-partitioned hard drive, neither could FreeDOS. Tom