The ext4 mkfs option lazy_itable_init, which is now activated automatically when kernel support is detected, speeds up formatting ext4 filesystems during install. When the fs is mounted, the kernel begins zeroing the inode tables in the background. During install, this is a somewhat wasted effort and interferes with the copy process. Mounting the filesystem with the no_init_itable mount option disables the background initialization. This should help the install go a bit faster, and after rebooting when the fs is mounted without the flag, the background initialization will be completed.
Binary package hint: partman-ext3
The ext4 mkfs option lazy_itable_init, which is now activated automatically when kernel support is detected, speeds up formatting ext4 filesystems during install. When the fs is mounted, the kernel begins zeroing the inode tables in the background. During install, this is a somewhat wasted effort and interferes with the copy process. Mounting the filesystem with the no_init_itable mount option disables the background initialization. This should help the install go a bit faster, and after rebooting when the fs is mounted without the flag, the background initialization will be completed.