nobh Do not attach buffer_heads to file pagecache.
-grpquota,noquota,quota,usrquota Quota options are silently ignored by ext2.
+quota, usrquota Enable user disk quota support
+ (requires CONFIG_QUOTA).
+
+grpquota Enable group disk quota support
+ (requires CONFIG_QUOTA).
+
+noquota option ls silently ignored by ext2.
Specification