Resize HDD on running system

• Resize target on VMWare or on Synology or where ever it is provided
• Stop services using the disk
• Unmount the disk
• Run e2fsck -f on the disk
• Rescan disks using echo 1>/sys/class/block/sdx/device/rescan (replace sdx by actual disk device)
• Extend partition using resize in cfdisk
• Extend filesystem using resize2fs on extended partition
• Mount the partition
• Start services