Gparted, должно быть, сделал более быстрый "ленивый" формат нового пространства ext4, и теперь, после монтажа, он заканчивает работу. Эти параметры mke2fs
должны объяснить:
lazy_itable_init[= <0 to disable, 1 to enable>] If enabled and the uninit_bg feature is enabled, the inode table will not be fully initialized by mke2fs. This speeds up filesystem initialization noticeably, but it requires the kernel to finish initializing the filesystem in the background when the filesystem is first mounted. If the option value is omitted, it defaults to 1 to enable lazy inode table zeroing. lazy_journal_init[= <0 to disable, 1 to enable>] If enabled, the journal inode will not be fully zeroed out by mke2fs. This speeds up filesystem initialization noticeably, but carries some small risk if the system crashes before the journal has been overwritten entirely one time. If the option value is omitted, it defaults to 1 to enable lazy journal inode zeroing.