TWRP: Failed to mount '/data'

Question

When I try to install a ROM with TWRP, I get

Could not mount /data and unable to find crypto footer.
Failed to mount '/data' (Invalid argument)
Unable to recreate /data/media folder.
Updating partition details...
Failed to mount '/data' (Invalid argument)
...done
Unable to mount storage
Failed to mount '/data' (Invalid argument)
Full SELinux support is present
Unable to mount /data/media/TWRP/.twrps

Then when I try to "Factory Reset" under TWRP Wipe, I get

/sbin/e2fsck -fp /dev/block/sda18 process ended with ERROR: 8
Unable to repair Data.
Failed to mount '/data' (Invalid argument)
Error changing file systems
Repairing Data using e2fsck...

I am using a Samsung Galaxy S7.

score 8 · Accepted Answer · answered Sep 17 '18 at 16:20

8

What you need to do is remove Crypto on Data

To do that, in TWRP

Settings
Format Data
Type "yes"
Done

answered Sep 17 '18 at 16:20

Evan Carroll

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I go to Settings but there is no Format Data button or option? – Ooker Dec 27 '20 at 08:00
Are you in TWRP? – Evan Carroll Dec 27 '20 at 08:04
yes, version 3.2.1-0 – Ooker Dec 27 '20 at 08:05
1

@Ooker do you see it under Wipe? or the like? – Evan Carroll Dec 27 '20 at 08:05
found it, thanks – Ooker Dec 27 '20 at 08:10
It would be a great addition to TWRP if it supported mounting an encrypted partition ... – Uwe Kleine-König May 11 '21 at 06:08

TWRP: Failed to mount '/data'

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