From: "André Schlichting" <andre@delorus.de>
To: Chris Murphy <lists@colorremedies.com>
Cc: linux-btrfs@vger.kernel.org
Subject: Re: Moved partition via dd
Date: Sun, 09 Jun 2013 00:42:01 +0200 [thread overview]
Message-ID: <51B3B339.4030108@delorus.de> (raw)
In-Reply-To: <E3D849EC-DDAC-4E05-9571-303B869F7A8D@colorremedies.com>
Am 09.06.2013 00:20, schrieb Chris Murphy:
>
> On Jun 8, 2013, at 8:47 AM, André Schlichting <andre@delorus.de> wrote:
>
>>
>> The old partition had the sector boundaries: 245547520 - 732566527
>>
>> I deleted this one and created a new one with boundaries: 33024 - 732566640
>>
>> Now I moved the data
>> > sudo dd conv=notrunc bs=4096 iflag=fullblock if=/dev/sdc2 skip=$((245547520-33024)) seek=0 of=/dev/sdc2
>
> You ultimately moved the wrong data because bs=4096 for dd, yet the partition logical sectors are based on 512 bytes.
>
>
> Chris Murphy
>
I'm not sure, but this external disk has a GPT with sector size 4096 and
as I wrote the dm-crypted LUKS container can be opened without complains.
> fdisk -l /dev/sdc
WARNING: fdisk GPT support is currently new, and therefore in an
experimental phase. Use at your own discretion.
Disk /dev/sdc: 3000.6 GB, 3000592982016 bytes, 732566646 sectors
Units = Sektoren of 1 * 4096 = 4096 bytes
Sector size (logical/physical): 4096 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk label type: gpt
# Start End Size Type Name
1 6 32773 128M Microsoft reserved partition
2 33024 732566640 2,7T Linux filesystem
André Schlichting
next prev parent reply other threads:[~2013-06-08 22:42 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-08 12:47 Moved partition via dd André Schlichting
2013-06-08 22:20 ` Chris Murphy
2013-06-08 22:42 ` André Schlichting [this message]
2013-06-08 22:57 ` Chris Murphy
2013-06-09 10:44 ` André Schlichting
2013-06-09 11:11 ` Hugo Mills
2013-06-09 17:05 ` André Schlichting
2013-06-09 20:09 ` Chris Murphy
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