Sometimes my external drives get uncleanly detached, and at the next connection a disk check is necessary.
What surprises me now is to see a slow disk check process on a journaled filesystem. According to the manual, that requires the
-f option, but that seems incorrect. Isn't the point of journaling that you never need a full disk check?
In detail, macOS started fsck automatically with
$ ps auxw|grep fsck root 3792 1.1 2.3 6429668 389400 ?? U 2:09pm 0:05.10 /System/Library/Filesystems/hfs.fs/Contents/Resources/./fsck_hfs -y /dev/disk3s2
Then I interrupted the process and re-run it by hand without
-y for greater control, as I usually do:
sudo fsck_hfs /dev/disk3s2 ** /dev/rdisk3s2 Executing fsck_hfs (version hfs-407.50.6). ** Checking Journaled HFS Plus volume. The volume name is MyPass4T-TM2 ** Checking extents overflow file. ** Checking catalog file. ** Checking multi-linked files.
FWIW, this is on a journaled HFS+ sparsebundle, that I use for Time Machine, hosted inside an external filesystem (ExFAT).