I want to use a SD card formatted with ext4 and mount it as /home/user/data I ask if is better disabling journaling to preserve SD. If so, can I have my internal hard disk (/dev/sda) with journaling and SD without it? Is there any issues in doing this? Is this a good way: http://www.techpository.com/linux-how-to-disableenable-journaling-on-an-ext4-filesystem/ ?

2 Answers 2


Yes, disabling journaling should reduce the amount of writes to the memory device.

The command mke2fs -t ext4 -O ^has_journal /dev/mmcblk0pX will format with journaling disabled.

See https://superuser.com/questions/799233/why-i-cannot-format-a-microsd-to-ext4?answertab=votes#tab-top

  • 1
    I chose to format SD with ext2
    – Teo
    Aug 7, 2017 at 23:31

If you still care, try F2FS instead of extX. It is developed for SD cards only.

It have a lot of pros for them, like:

  • Copy on write (CoW), to reduce R/W
  • Roll-backs, dual checkpoints (may be very useful)

and some others, including no traditional journaling.

To create it, you need f2fs-tools (mkfs.f2fs) or GParted. Support (mounting and working) is included in linux kernel, including some android builds.

  • 2
    Can you please expand this comment into a full answer? What are the benefits, and how is F2FS used? Nov 1, 2018 at 16:05

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