From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Peter Teoh" Subject: Why my USB disk drive is mounted "WriteProtect is on"? Date: Mon, 2 Jun 2008 05:34:30 +0800 Message-ID: <804dabb00806011434n47101206t40f50e2398e7a0c8@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from an-out-0708.google.com ([209.85.132.245]:34635 "EHLO an-out-0708.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752211AbYFAVee (ORCPT ); Sun, 1 Jun 2008 17:34:34 -0400 Received: by an-out-0708.google.com with SMTP id d40so227197and.103 for ; Sun, 01 Jun 2008 14:34:30 -0700 (PDT) Content-Disposition: inline Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: linux-fsdevel@vger.kernel.org, Linux Driver Developers , linux-ide@vger.kernel.org Got no reply from linux-usb. So trying here. In the past I was able to mount it as "WriteProtect is off"....but one day....suddenly it became "on" on two of my machine, but the others like 3 still "off". So right now the status is as follows: usb-storage: waiting for device to settle before scanning usbcore: registered new interface driver usb-storage USB Mass Storage support registered. scsi 6:0:0:0: Direct-Access WD 1600BEAExternal 1.02 PQ: 0 ANSI: 0 sd 6:0:0:0: [sdc] 312581808 512-byte hardware sectors (160042 MB) sd 6:0:0:0: [sdc] Write Protect is on sd 6:0:0:0: [sdc] Mode Sense: 12 a1 9e af sd 6:0:0:0: [sdc] Assuming drive cache: write through sd 6:0:0:0: [sdc] 312581808 512-byte hardware sectors (160042 MB) sd 6:0:0:0: [sdc] Write Protect is on sd 6:0:0:0: [sdc] Mode Sense: 12 a1 9e af sd 6:0:0:0: [sdc] Assuming drive cache: write through sdc: sdc1 sdc2 sdc3 < sdc5 > sdc4 sd 6:0:0:0: [sdc] Attached SCSI disk sd 6:0:0:0: Attached scsi generic sg2 type 0 usb-storage: device scan complete But when u plug out and insert into another machine, it may be detected as "off", why? With this writeprotect on, there is no way i can mount it for writing. Appreciate your answer very much. THanks. -- Regards, Peter Teoh