AIX 5L 创建VG（1）
最近在AIX 5L上安装ORACLE 10G，需要先划空间，下文将讲述使用smit创建vg的过程
shell>smitty mkvg:
Move cursor to desired item and press Enter.
Add an Original Volume Group
Add a Big Volume Group
Add a Scalable Volume Group
选择第一项即可，第2和第3项都是在增加了vg容量作出了调整，但是本文是测试，不需要多大的空间，也没有那么多的pv供选择。
默认情况下是第一项，加车即可
回车后
Add an Original Volume Group
Type or select values in entry fields.
Press Enter AFTER making all desired changes.
[Entry Fields]
VOLUME GROUP name [oradata]
Physical partition SIZE in megabytes 8 +
* PHYSICAL VOLUME names [hdisk2] +
Force the creation of a volume group? no +
Activate volume group AUTOMATICALLY yes +
at system restart?
Volume Group MAJOR NUMBER [] +#
Create VG Concurrent Capable? no +
按两次回车确认
Command: failed stdout: yes stderr: no
Before command completion, additional instructions may appear below.
0516-1208 /usr/sbin/mkvg: Warning, The Physical Partition Size of 8 requires the
creation of 35762 partitions for hdisk4. The system limitation is 16256
physical partitions per disk at a factor value of 16. Specify a larger
Physical Partition Size or a larger factor value in order create a
volume group on this disk.
0516-862 /usr/sbin/mkvg: Unable to create volume group.
晕，提示要加大pp的大小，用F3退回
因为普通vg要求 多只能含有16256个pp，因为目前的磁盘空间是35762*8/1024约为280G
从pv上看大小，大致也可以验证这一点：
[tydic91:root:/]#i=$((35762*8))
[tydic91:root:/]#echo $i
286096
[tydic91:root:/]#lspv hdisk4
PHYSICAL VOLUME: hdisk4 VOLUME GROUP: oradata
PV IDENTIFIER: 005f555d8f66431e VG IDENTIFIER 005f555d00004c000000012ebf74ac0f
PV STATE: active
STALE PARTITIONS: 0 ALLOCATABLE: yes
PP SIZE: 512 megabyte(s) LOGICAL VOLUMES: 0
TOTAL PPs: 558 (285696 megabytes) VG DESCRIPTORS: 2
FREE PPs: 558 (285696 megabytes) HOT SPARE: no
USED PPs: 0 (0 megabytes) MAX REQUEST: 256 kilobytes
FREE DISTRIBUTION: 112..112..111..111..112
USED DISTRIBUTION: 00..00..00..00..00
hdisk4为280G左右
16<285696/16256=17<32
因此，其最小大小应该为32M
测试下：
1）删除VG组
[tydic91:root:/]#lspv
hdisk0 005f555d8ece14ea rootvg active
hdisk1 005f555d7afe4fe8 rootvg active
hdisk2 005f555d8f6640f8 None
hdisk3 005f555d8f66420a None
hdisk4 005f555d8f66431e oradata active
[tydic91:root:/]#varyoffvg oradata
[tydic91:root:/]#lspv
hdisk0 005f555d8ece14ea rootvg active
hdisk1 005f555d7afe4fe8 rootvg active
hdisk2 005f555d8f6640f8 None
hdisk3 005f555d8f66420a None
hdisk4 005f555d8f66431e oradata
[tydic91:root:/]#exportvg oradata
[tydic91:root:/]#lspv
hdisk0 005f555d8ece14ea rootvg active
hdisk1 005f555d7afe4fe8 rootvg active
hdisk2 005f555d8f6640f8 None
hdisk3 005f555d8f66420a None
hdisk4 005f555d8f66431e None
2）以32M创建VG
再以32M创建
VOLUME GROUP name [oradata]
Physical partition SIZE in megabytes 32 +
* PHYSICAL VOLUME names [hdisk2] +
Force the creation of a volume group? no +
Activate volume group AUTOMATICALLY yes +
at system restart?
Volume Group MAJOR NUMBER [] +#
Create VG Concurrent Capable? no +
Command: OK stdout: yes stderr: no
Before command completion, additional instructions may appear below.
oradata
果然，32M不存在这个问题
3)最后重复第2步，将卷组名设置为oradatavg，PP大小为64M
VOLUME GROUP name [oradata]
Physical partition SIZE in megabytes 64 +
* PHYSICAL VOLUME names [hdisk2] +
Force the creation of a volume group? yes +
Activate volume group AUTOMATICALLY yes +
at system restart?
Volume Group MAJOR NUMBER [] +#
Create VG Concurrent Capable? no +
Command: OK stdout: yes stderr: no
Before command completion, additional instructions may appear below.
oradatavg
[tydic91:root:/]#lspv
hdisk0 005f555d8ece14ea rootvg active
hdisk1 005f555d7afe4fe8 rootvg active
hdisk2 005f555d8f6640f8 oradatavg active
hdisk3 005f555d8f66420a None
hdisk4 005f555d8f66431e None