Update vgcreate man page.

WHATS_NEW

@@ -1,5 +1,6 @@
 Version 2.01.01 - 
 ===================================
+  Update vgcreate man page.
 
 Version 2.01.00 - 17th January 2005
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man/vgcreate.8

@@ -33,29 +33,44 @@ previously configured for LVM with
 .SH OPTIONS
 See \fBlvm\fP for common options.
 .TP
-.BR \-A ", " \-\-autobackup " {" y | n }
-Controls automatic backup of VG metadata after the change (see
-.BR vgcfgbackup (8)).
-Default is yes.
-.TP
 .BR \-l ", " \-\-maxlogicalvolumes " " \fIMaxLogicalVolumes\fR
-Sets the maximum possible logical volume count.
+Sets the maximum number of logical volumes allowed in this
-More logical volumes can't be created in this volume group.
+volume group. 
-Absolute maximum is 256.
+The setting can be changed with \fBvgchange\fP.
+For volume groups with metadata in lvm1 format, the limit
+and default value is 255.  
+If the metadata uses lvm2 format, the default value is 0
+which removes this restriction: there is then no limit.
 .TP
 .BR \-p ", " \-\-maxphysicalvolumes " " \fIMaxPhysicalVolumes\fR
-Sets the maximum possible physical volume count.
+Sets the maximum number of physical volumes that can belong
-More physical volumes can't be included in this volume group.
+to this volume group.
-Absolute maximum is 256.
+The setting can be changed with \fBvgchange\fP.
+For volume groups with metadata in lvm1 format, the limit
+and default value is 255.  
+If the metadata uses lvm2 format, the default value is 0
+which removes this restriction: there is then no limit.
+If you have a large number of physical volumes in
+a volume group with metadata in lvm2 format, 
+for tool performance reasons, you should consider 
+some use of \fB--metadatacopies 0\fP
+as described in \fBpvcreate(8)\fP.
 .TP
 .BR \-s ", " \-\-physicalextentsize " " \fIPhysicalExtentSize\fR[\fBkKmMgGtT\fR]
 Sets the physical extent size on physical volumes of this volume group.
 A size suffix (k for kilobytes up to t for terabytes) is optional, megabytes
 is the default if no suffix is present.  Values can be from 8 KB to 16 GB in
-powers of 2. The default of 4 MB causes maximum LV sizes of ~256GB because as
+powers of 2.  The default is 4 MB.
-many as ~64k extents are supported per LV. In case larger maximum LV sizes are
+Once this value has been set, it is difficult to change it without recreating
-needed (later), you need to set the PE size to a larger value as well. Later
+the volume group which would involve backing up and restoring data on any 
-changes of the PE size in an existing VG are not supported.
+logical volumes.
+If the volume group metadata uses lvm1 format, there is a limit of 65534
+extents in each logical volume, so the default of 4 MB leads to a maximum 
+logical volume size of around 256GB.
+If the volume group metadata uses lvm2 format there is no such restriction,
+although having a large number of extents will slow down
+the tools but have no impact on I/O performance to the logical volume.
+The 2.4 kernel has a limitation of 2TB per block device.
 .SH EXAMPLES
 To create a volume group named
 .B test_vg 
@@ -67,11 +82,6 @@ with default physical extent size of 4MB:
 \	vgcreate test_vg /dev/sdk1 /dev/sdl1
 
 .fi
-To limit kernel memory usage, there is a limit of 65536 physical extents
-(PE) per logical volume, so the PE size determines the maximum logical volume
-size.  The default PE size of 4MB limits a single logical volume to 256GB (see
-the -s option to raise that limit).
-There is also (as of Linux 2.4) a kernel limitation of 2TB per block device.
 .SH SEE ALSO
 .BR lvm (8),
 .BR pvdisplay (8),