****
There are several reserved ranges of FID sequence values
(summarized in the list above), to allow for interoperability with
-older Lustre filesystems, to identify "well known" objects for
+older Lustre file systems, to identify "well known" objects for
internal or external use, as well as for future expansion.
The 'FID_SEQ_OST_MDT0' (0x0) range is reserved for OST objects created
-by MDT0 in non-DNE filesystems. Since all such OST objects used an
-'f_seq' value of zero these FIDs are not unique across the filesystem,
+by MDT0 in non-DNE file systems. Since all such OST objects used an
+'f_seq' value of zero these FIDs are not unique across the file system,
but the reservation of 'FID_SEQ_OST_MDT0' allows these FIDs to co-exist
with other FIDs in the same 128-bit identifier space.
The 'FID_SEQ_IGIF' (0xb-0xffffffff) range is reserved for 'inode
generation in FID' (IGIF) inodes allocated by MDSs before Lustre 2.0.
This corresponds to the 4 billion maximum inode number that could be
-allocated for such filesystems. The 'f_oid' field for IGIF FIDs
+allocated for such file systems. The 'f_oid' field for IGIF FIDs
contains the inode version number, and as such there is normally only
a single object for each 'f_seq' value.
The 'FID_SEQ_IDIF' (0x100000000-0x1fffffffff) range is reserved for
mapping OST objects that were created by MDT0 using 'FID_SEQ_OST_MDT0'
-to filesystem-unique FIDs. The second 16-bit field (bits 16-31) of the
+to file-system-unique FIDs. The second 16-bit field (bits 16-31) of the
'f_seq' field contains the OST index (0-65535). The low 16-bit field
(bits 0-15) of 'f_seq' contains the high (bits 32-47) bits of the OST
object ID, and the 32-bit 'f_oid' field contains the low 32 bits of
known" objects internal to the server and is not exposed to the network.
The 'FID_SEQ_DOT_LUSTRE' (0x200000002) range is reserved for files
-under the hidden ".lustre" directory in the root of the filesystem.
+under the hidden ".lustre" directory in the root of the file system.
The 'FID_SEQ_LOCAL_NAME' (0x200000003) range is reserved for objects
internal to the server that are allocated by name.