How do I shrink a partition from the beginning? i.e. create empty space at the beginning of the block device?












1














I have devices with SD cards, with several partitions. The first partitions on the card is typically not mounted, and have vfat filesystem.



What I want to achieve is, to create a 1MB free space just before the partition, so I'd like to not just to resize the fs and partition, but also to align them to the end of the available space. I know some GUI based tools do that, but I need to do this on a minimal embedded system, using scripts or ssh connections.



The current map of the SD card (4GB) is.



16MB vfat

160MB squashfs

160MB squashfs

rest ext4



The idea is to preserve the structure but put raw u-boot at the beginning.










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  • That would be helpful to know how many partitions, which type of file systems, sd card size, partitions sizes etc..
    – Pierre-Alain TORET
    Dec 14 at 18:33
















1














I have devices with SD cards, with several partitions. The first partitions on the card is typically not mounted, and have vfat filesystem.



What I want to achieve is, to create a 1MB free space just before the partition, so I'd like to not just to resize the fs and partition, but also to align them to the end of the available space. I know some GUI based tools do that, but I need to do this on a minimal embedded system, using scripts or ssh connections.



The current map of the SD card (4GB) is.



16MB vfat

160MB squashfs

160MB squashfs

rest ext4



The idea is to preserve the structure but put raw u-boot at the beginning.










share|improve this question
























  • That would be helpful to know how many partitions, which type of file systems, sd card size, partitions sizes etc..
    – Pierre-Alain TORET
    Dec 14 at 18:33














1












1








1


1





I have devices with SD cards, with several partitions. The first partitions on the card is typically not mounted, and have vfat filesystem.



What I want to achieve is, to create a 1MB free space just before the partition, so I'd like to not just to resize the fs and partition, but also to align them to the end of the available space. I know some GUI based tools do that, but I need to do this on a minimal embedded system, using scripts or ssh connections.



The current map of the SD card (4GB) is.



16MB vfat

160MB squashfs

160MB squashfs

rest ext4



The idea is to preserve the structure but put raw u-boot at the beginning.










share|improve this question















I have devices with SD cards, with several partitions. The first partitions on the card is typically not mounted, and have vfat filesystem.



What I want to achieve is, to create a 1MB free space just before the partition, so I'd like to not just to resize the fs and partition, but also to align them to the end of the available space. I know some GUI based tools do that, but I need to do this on a minimal embedded system, using scripts or ssh connections.



The current map of the SD card (4GB) is.



16MB vfat

160MB squashfs

160MB squashfs

rest ext4



The idea is to preserve the structure but put raw u-boot at the beginning.







partition embedded sd-card move-partition






share|improve this question















share|improve this question













share|improve this question




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edited Dec 16 at 14:12

























asked Dec 14 at 10:02









Atilla Filiz

2921410




2921410












  • That would be helpful to know how many partitions, which type of file systems, sd card size, partitions sizes etc..
    – Pierre-Alain TORET
    Dec 14 at 18:33


















  • That would be helpful to know how many partitions, which type of file systems, sd card size, partitions sizes etc..
    – Pierre-Alain TORET
    Dec 14 at 18:33
















That would be helpful to know how many partitions, which type of file systems, sd card size, partitions sizes etc..
– Pierre-Alain TORET
Dec 14 at 18:33




That would be helpful to know how many partitions, which type of file systems, sd card size, partitions sizes etc..
– Pierre-Alain TORET
Dec 14 at 18:33















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