Resizing a logical partition with a LUKS container

I have a logical partition that contains LUKS which holds an LVM2 schema. My goal is to resize the existing logical partition so I can create other partitions in their own LUKS-encrypted container. So far, the LVM2 PV is resized and I'm looking for advice on how to handle shrinking the LUKS container and the logical partition it lives on.
I heard rumors that LUKS containers don't need to be resized and that I can change the size of the block device it lives on without problems. Is this true? If so, it seems like I should be able to delete the logical partition and replace it with a smaller one as usual. How can I calculate the blocks/sectors/etc for the new partition with the LUKS & LVM2 data on there?
Last edited by synthead (2013-02-16 07:42:02)

Running into a new problem:
# fdisk /dev/sda
Welcome to fdisk (util-linux 2.22.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Command (m for help): p
Disk /dev/sda: 128.0 GB, 128035676160 bytes, 250069680 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0005c24e
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 499711 248832 83 Linux
/dev/sda2 501758 250068991 124783617 5 Extended
/dev/sda5 501760 250068991 124783616 83 Linux
Command (m for help): d
Partition number (1-5): 5
Partition 5 is deleted
Command (m for help): p
Disk /dev/sda: 128.0 GB, 128035676160 bytes, 250069680 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0005c24e
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 499711 248832 83 Linux
/dev/sda2 501758 250068991 124783617 5 Extended
Command (m for help): n
Partition type:
p primary (1 primary, 1 extended, 2 free)
l logical (numbered from 5)
Select (default p): l
Adding logical partition 5
First sector (503806-250068991, default 503808): 501760
Value out of range.
Why can't I create a partition on the same starting sector as before?

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Hi,
I am trying to install Arch after being an Ubuntu user for approximatley two years.
I re-formatted my drive to create an ~20Gb space in an ext4 extended partition since my previous would not allow more than four primary partitions.
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Device Boot Start End Blocks Id System
/dev/sda1 * 2048 112642047 56320000 7 HPFS/NTFS/exFAT
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Oh, ok then, that makes sense ... I don't know the reason to align partitions to cylinders but there must be a good reason, although even if they are not aligned it shouldn't be a big problem (at least gparted allows you to create unaligned partitions).
Personally gparted is not my first choice when dealing with partitions, it already scared me _big time_ and even if linux doesn't complain about partitions not being in the order they are on disk some programs complain about that (and gparted does make a mess out of that) and even refuse to do anything before they fix that (partition magic for example, and I've never lost any data or even got scared when using it).
Lately I have been doing it like this, create the partitions with cfdisk which leaves everything in a way no program complains, then I format the partitions with mkfs.whatever or I use gparted just to format the partitions, I've never had problems when doing things like that.
The last time I've used gparted to resize partitions things went well but on another occasion it did make a huge mess out of the partition layout (there were ntfs partitions involved when it went wrong, and only ext3 when all went well) leaving me with a problem similar to what you have now, luckily testdisk came to the rescue but I reckon I was just lucky that time.
I've learned my lesson, _always_ make backups or copy things to another disk, besides being probably faster (as gparted does a ton of checks) it is a lot safer and if you have really important stuff on your hard disk you can't afford to be relying on the chance of not loosing it in the process.

Merge physical and logical partitions

How do I extend my physical arch partition with an unallocated space logical partition?
I want to add an unallocated space logical partition to a physical partition
or better said I want to grow my existing arch physical partition with the unallocated space logical partition.
Last edited by karlzt (2010-03-20 15:50:31)

It is not that easy. You can resize and/or move either physical partitions or locical partitions inside the space of the (physical) "extended partition". But you cannot simply take space from a logical partion and assign it to a physical partition adjacent to the extended partition it is part of. Which means you can extend a physical partion only from free space which you can produce by a prior shrinking/moving another adjacent physical partition.
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FATAL ERROR: Bad logical partition 6: enlarged logical partitions over

I am trying to install Arch on my second computer, but I get this error in cfdisk:
FATAL ERROR: Bad logical partition 6: enlarged logical partitions overlap.
This is the output of fdisk -l:
$ sudo fdisk /dev/sda -l
Schijf /dev/sda: 500.1 GB, 500107862016 bytes
255 koppen, 63 sectoren/spoor, 60801 cilinders
Eenheid = cilinders van 16065 * 512 = 8225280 bytes
Schijf-ID: 0xeaca5f2c
Apparaat Opstart Begin Einde Blokken ID Systeem
/dev/sda1 * 1 8475 68075406 7 HPFS/NTFS
/dev/sda2 8476 56711 387442688+ 7 HPFS/NTFS
/dev/sda3 57998 60801 22523130 f W95 Uitgeb. (LBA)
Partition 3 does not end on a cylinder boundary.
/dev/sda5 58252 60801 20482875 83 Linux
/dev/sda6 57998 58250 2032159+ 82 Linux wisselgeheugen
This is the output of parted:
Model: ATA WDC WD5000AAKS-0 (scsi)
Schijf /dev/sda: 500GB
Sectorgrootte (logisch/fysiek): 512B/512B
Partitietabel: msdos
Nummer Begin Einde Grootte Type Bestandssysteem Vlaggen
1 32,3kB 69,7GB 69,7GB primary ntfs opstartbaar
2 69,7GB 466GB 397GB primary ntfs
3 477GB 500GB 23,1GB extended lba
6 477GB 479GB 2081MB logical linux-swap
5 479GB 500GB 21,0GB logical ext4
I actually got the same error on my other system too, but then I deleted all the partitions, which is not really an option on this system. What is causing this problem?
Last edited by Revelation60 (2009-03-21 17:56:44)

Oh, ok then, that makes sense ... I don't know the reason to align partitions to cylinders but there must be a good reason, although even if they are not aligned it shouldn't be a big problem (at least gparted allows you to create unaligned partitions).
Personally gparted is not my first choice when dealing with partitions, it already scared me _big time_ and even if linux doesn't complain about partitions not being in the order they are on disk some programs complain about that (and gparted does make a mess out of that) and even refuse to do anything before they fix that (partition magic for example, and I've never lost any data or even got scared when using it).
Lately I have been doing it like this, create the partitions with cfdisk which leaves everything in a way no program complains, then I format the partitions with mkfs.whatever or I use gparted just to format the partitions, I've never had problems when doing things like that.
The last time I've used gparted to resize partitions things went well but on another occasion it did make a huge mess out of the partition layout (there were ntfs partitions involved when it went wrong, and only ext3 when all went well) leaving me with a problem similar to what you have now, luckily testdisk came to the rescue but I reckon I was just lucky that time.
I've learned my lesson, _always_ make backups or copy things to another disk, besides being probably faster (as gparted does a ton of checks) it is a lot safer and if you have really important stuff on your hard disk you can't afford to be relying on the chance of not loosing it in the process.

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Hmm I doubt you could be abele to restore the WinRE partition again without a usage of the Vista CD it seems you have completely delete this partition an also the whole data from the partition.
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Resizing a logical partition with a LUKS container

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