From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by finch.gentoo.org (Postfix) with ESMTPS id 5B476138350 for ; Thu, 30 Apr 2020 09:32:27 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 6A8BEE08F2; Thu, 30 Apr 2020 09:32:21 +0000 (UTC) Received: from mout02.posteo.de (mout02.posteo.de [185.67.36.66]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by pigeon.gentoo.org (Postfix) with ESMTPS id DFEBCE08D1 for ; Thu, 30 Apr 2020 09:32:20 +0000 (UTC) Received: from submission (posteo.de [89.146.220.130]) by mout02.posteo.de (Postfix) with ESMTPS id 1E7E92400FB for ; Thu, 30 Apr 2020 11:32:18 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.de; s=2017; t=1588239138; bh=mWM/tv9MaPlCbiSJPON//gJYY/2EJxfC+dC9DHzbd3U=; h=Date:From:To:Subject:From; b=FPk8HysCqJd2QC73OCJ38zWV0vlFiXYcKx/eBZDEOjwqqUkgbsGfG7yfw8BXe3E5A 9nc0yVf+IAdIbwgsZFzxsxeB2Jd4qa5K85Aktc0zhp5ofqgAsshZJMsv3JdVK8MbBX E+lDyB+ZPKMY2w10hjtWzW9HAPfJnJLZ2UddWMjKgPdIzwotV2d2e8078sHQuXhJJI FqWACnDJFxhS+dD9dDrdu0tPG+9QByA2kv04T47uCbXbDhegYtRcidHc4//ZG7+hM3 yFr+mRO8+93vm/3wpuxqvlrnEJO9HAUx6ER+lam7v502k+msFnuEgSij0B1TWpa/22 vdgPKZJ8ZstEQ== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 49CVXK3S49z9ryJ for ; Thu, 30 Apr 2020 11:32:17 +0200 (CEST) Date: Thu, 30 Apr 2020 11:32:17 +0200 From: tuxic@posteo.de To: Gentoo Subject: [gentoo-user] Trouble with backup harddisks Message-ID: <20200430093217.efprkpt4kbvir7nr@solfire> Mail-Followup-To: Gentoo Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org X-Auto-Response-Suppress: DR, RN, NRN, OOF, AutoReply MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Archives-Salt: 70a49c49-8c56-444b-a59d-297b544a528d X-Archives-Hash: 270f0504ed05dd50c51d97d05b16fee3 Hi, recently I switched from the old MBR-scheme to GPT on my new PC. I have two external USB-harddisk, which were partioned/formatted with a MBR-scheme/MSDOS partition (but were never used to boot from. They are pure data containers). When I connect these to my new PC, only the device is shown: /dev/sdb, /dev/sdc. The kernel is configured (beside other things) as follows: # # Partition Types # CONFIG_PARTITION_ADVANCED=y # CONFIG_ACORN_PARTITION is not set # CONFIG_AIX_PARTITION is not set # CONFIG_OSF_PARTITION is not set # CONFIG_AMIGA_PARTITION is not set # CONFIG_ATARI_PARTITION is not set # CONFIG_MAC_PARTITION is not set CONFIG_MSDOS_PARTITION=y # CONFIG_BSD_DISKLABEL is not set # CONFIG_MINIX_SUBPARTITION is not set # CONFIG_SOLARIS_X86_PARTITION is not set # CONFIG_UNIXWARE_DISKLABEL is not set # CONFIG_LDM_PARTITION is not set # CONFIG_SGI_PARTITION is not set # CONFIG_ULTRIX_PARTITION is not set # CONFIG_SUN_PARTITION is not set # CONFIG_KARMA_PARTITION is not set CONFIG_EFI_PARTITION=y # CONFIG_SYSV68_PARTITION is not set # CONFIG_CMDLINE_PARTITION is not set # end of Partition Types CONFIG_BLOCK_COMPAT=y CONFIG_BLK_MQ_PCI=y CONFIG_BLK_MQ_VIRTIO=y CONFIG_BLK_PM=y dmesg shows this: [14617.672363] usb 2-2: New USB device found, idVendor=1058, idProduct=25a2, bcdDevice=10.21 [14617.672364] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [14617.672364] usb 2-2: Product: Elements 25A2 [14617.672365] usb 2-2: Manufacturer: Western Digital [14617.672366] usb 2-2: SerialNumber: 575844314132383959393934 [14617.681660] usb-storage 2-2:1.0: USB Mass Storage device detected [14617.681737] scsi host10: usb-storage 2-2:1.0 [14618.725450] scsi 10:0:0:0: Direct-Access WD Elements 25A2 1021 PQ: 0 ANSI: 6 [14618.725594] sd 10:0:0:0: Attached scsi generic sg1 type 0 [14618.728090] sd 10:0:0:0: [sdb] Spinning up disk... [14619.748918] ...ready I tried different USB ports in a desperate hope of success... ...no, same problem. Interestingly fdisk shows the following: host> sudo fdisk -l /dev/sdb Disk /dev/sdb: 931.49 GiB, 1000170586112 bytes, 1953458176 sectors Disk model: Elements 25A2 Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: dos Disk identifier: 0x16f2a91f Device Boot Start End Sectors Size Id Type /dev/sdb1 1 1953458175 1953458175 931.5G ee GPT The type is shown as GPT...but the drive has a MSDOS partition table. Reading my (old) internal harddrive with an external USB docking station is possible without any problems, though. Unfortunatelu I have no space for 1T image of that drive -- otherwise I would have made an image copy and experiment with that. So better ask, than sorry.... ;) Is this fixable or did I lost my backups? Cheers! Meino