Mounting ext2fs - unsupported features: needs_recovery

David Christensen dpchrist at
Wed Aug 19 09:12:56 UTC 2020

On 2020-08-19 02:03, Christoph Kukulies wrote:
> I’m trying to mount a filesystem that is on an external SATA disk. Partition ID 0x83 (Linux).
> Trying to do a
> mount -t ext2fs /dev/da5s3 /mnt/da5s3
> mount: /dev/da5s3: Invalid argument
> #
> syslog message is:
> WARNING: mount of da5s3 denied due to unsupported optional features:
> needs_recovery
>> Christoph

Are you certain the filesystem is ext2?

Have you tried connecting the disk to a Linux system and running e2fsck(8)?


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