Hello I went to run fsck and I get the following message "/dev/disk/by-id/ata-WDC_WD1200UE-22KVT0_WD-WXE906958552-part6 is mounted.

WARNING!!! Running e2fsck on a mounted filesystem may cause
SEVERE filesystem damage.

Do you really want to continue (y/n)?"

Now I don't know what this is and where exactly it mounts to,is it something I should ignore?...any help would be appreciated. Thanks