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Hi, |
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|
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recently I switched from the old MBR-scheme to GPT on |
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my new PC. |
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|
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I have two external USB-harddisk, which were partioned/formatted with |
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a MBR-scheme/MSDOS partition (but were never used to boot from. They are pure |
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data containers). |
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|
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When I connect these to my new PC, only the device is shown: |
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/dev/sdb, /dev/sdc. |
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|
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The kernel is configured (beside other things) as follows: |
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|
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# |
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# Partition Types |
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# |
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CONFIG_PARTITION_ADVANCED=y |
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# CONFIG_ACORN_PARTITION is not set |
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# CONFIG_AIX_PARTITION is not set |
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# CONFIG_OSF_PARTITION is not set |
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# CONFIG_AMIGA_PARTITION is not set |
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# CONFIG_ATARI_PARTITION is not set |
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# CONFIG_MAC_PARTITION is not set |
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CONFIG_MSDOS_PARTITION=y |
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# CONFIG_BSD_DISKLABEL is not set |
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# CONFIG_MINIX_SUBPARTITION is not set |
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# CONFIG_SOLARIS_X86_PARTITION is not set |
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# CONFIG_UNIXWARE_DISKLABEL is not set |
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# CONFIG_LDM_PARTITION is not set |
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# CONFIG_SGI_PARTITION is not set |
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# CONFIG_ULTRIX_PARTITION is not set |
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# CONFIG_SUN_PARTITION is not set |
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# CONFIG_KARMA_PARTITION is not set |
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CONFIG_EFI_PARTITION=y |
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# CONFIG_SYSV68_PARTITION is not set |
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# CONFIG_CMDLINE_PARTITION is not set |
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# end of Partition Types |
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|
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CONFIG_BLOCK_COMPAT=y |
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CONFIG_BLK_MQ_PCI=y |
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CONFIG_BLK_MQ_VIRTIO=y |
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CONFIG_BLK_PM=y |
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|
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dmesg shows this: |
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[14617.672363] usb 2-2: New USB device found, idVendor=1058, idProduct=25a2, bcdDevice=10.21 |
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[14617.672364] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 |
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[14617.672364] usb 2-2: Product: Elements 25A2 |
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[14617.672365] usb 2-2: Manufacturer: Western Digital |
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[14617.672366] usb 2-2: SerialNumber: 575844314132383959393934 |
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[14617.681660] usb-storage 2-2:1.0: USB Mass Storage device detected |
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[14617.681737] scsi host10: usb-storage 2-2:1.0 |
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[14618.725450] scsi 10:0:0:0: Direct-Access WD Elements 25A2 1021 PQ: 0 ANSI: 6 |
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[14618.725594] sd 10:0:0:0: Attached scsi generic sg1 type 0 |
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[14618.728090] sd 10:0:0:0: [sdb] Spinning up disk... |
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[14619.748918] ...ready |
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|
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I tried different USB ports in a desperate hope of success... |
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...no, same problem. |
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|
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Interestingly fdisk shows the following: |
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|
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host> sudo fdisk -l /dev/sdb |
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Disk /dev/sdb: 931.49 GiB, 1000170586112 bytes, 1953458176 sectors |
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Disk model: Elements 25A2 |
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Units: sectors of 1 * 512 = 512 bytes |
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Sector size (logical/physical): 512 bytes / 512 bytes |
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I/O size (minimum/optimal): 512 bytes / 512 bytes |
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Disklabel type: dos |
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Disk identifier: 0x16f2a91f |
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|
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Device Boot Start End Sectors Size Id Type |
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/dev/sdb1 1 1953458175 1953458175 931.5G ee GPT |
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The type is shown as GPT...but the drive has a MSDOS partition table. |
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Reading my (old) internal harddrive with an external USB docking |
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station is possible without any problems, though. |
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Unfortunatelu I have no space for 1T image of that drive -- otherwise |
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I would have made an image copy and experiment with that. |
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|
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So better ask, than sorry.... ;) |
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Is this fixable or did I lost my backups? |
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Cheers! |
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Meino |
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