Hello,

In my disk I had an extended partition and a logical partition within it, more or less like this:

Device Start End Id System
-------------------------------------------------------------------------------------------
/dev/sda1 2000 35003 85 Linux extended
/dev/sda5 5224 35003 83 Linux

Note that the sda1 partition was empty from cylinders 2000 to 5223. Then, I decided to remove the empty space by shrinking sda1, using Yast's partitioning tool to edit its start cylinder:

Device Start End Id System
-------------------------------------------------------------------------------------------
/dev/sda1 5224 35003 85 Linux extended
/dev/sda5 5224 35003 83 Linux

After I did this, sda5 became unusable. When I try to mount sda5, the partitioning tool now says "it is not allowed to assign a mount point to a device with nonexistent or unknown filesystem".

Please, can someone try to explain what happened? What directions should I take to repair the partition?

Thanks in advance,

Matheus

You can try running testdisk to restore the old partition table.