From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrey Borzenkov Subject: CDROMEJECT (or START_STOP(2)) completely disables USB flash stick Date: Thu, 6 Jul 2006 13:10:04 +0400 Message-ID: <200607061310.14526.arvidjaar@mail.ru> Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mx2.mail.ru ([194.67.23.122]:52852 "EHLO mx2.mail.ru") by vger.kernel.org with ESMTP id S965118AbWGFJKS (ORCPT ); Thu, 6 Jul 2006 05:10:18 -0400 Content-Disposition: inline Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: linux-kernel@vger.kernel.org Cc: linux-scsi@vger.kernel.org -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 While working on some HAL issues I hit some not clear - to me at least - behavior. I was testing HAL Eject method that under Linux effectively calls 'eject /dev/block'. Now for USB stick - at least, that I have, this results in "ejecting medium" without apparently any way to get it back (the only way is to replug stick). UEVENT[1152175788.114199] remove@/block/sda/sda1 ACTION=remove DEVPATH=/block/sda/sda1 SUBSYSTEM=block SEQNUM=1332 MINOR=1 MAJOR=8 PHYSDEVPATH=/devices/pci0000:00/0000:00:02.0/usb1/1-1/1-1:1.0/host1/target1:0:0/1:0:0:0 PHYSDEVBUS=scsi PHYSDEVDRIVER=sd In this state I do see device: {pts/0}% sudo sdparm -a /dev/sda /dev/sda: 128MB 2.00 {pts/0}% cat /proc/scsi/scsi Attached devices: Host: scsi1 Channel: 00 Id: 00 Lun: 00 Vendor: Model: 128MB Rev: 2.00 Type: Direct-Access ANSI SCSI revision: 02 but any attempt to get partition back results in {pts/0}% LC_ALL=C sudo blockdev --rereadpt /dev/sda /dev/sda: No medium found I tried 'sdparm -C start' without much success as well: {pts/0}% LC_ALL=C sudo sdparm -v -C start /dev/sda /dev/sda: 128MB 2.00 Start stop unit command: 1b 00 00 00 01 00 {pts/0}% LC_ALL=C sudo blockdev --rereadpt /dev/sda /dev/sda: No medium found Well, I just try to understand if this is a expected (and reasonable) behaviour or a bug in hardware or possibly software? Thank you - -andrey -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.3 (GNU/Linux) iD8DBQFErNN2R6LMutpd94wRAg1DAJ9EITRTZCm/ej5PXzxAK71s7sUCVACgiNFx KXOuNAwwhPKYcogaK6LgMZM= =MHVX -----END PGP SIGNATURE-----