一、首先要在存储端扩容lun或者划分一个新lun

步骤

1. df -g 查找出/u01 对应的VG卷 VOLUME GROUP:

# df -g
Filesystem    GB blocks      Free %Used    Iused %Iused Mounted on
.
.
/dev/fslv00       60.00      3.95   94%   550567    36% /u01

# lslv fslv00
LOGICAL VOLUME:     fslv00                 VOLUME GROUP:   rootvg
LV IDENTIFIER:      00f8d67e00004c000000014545274d99.13 PERMISSION:     read/write
VG STATE:           active/complete        LV STATE:       opened/syncd
TYPE:               jfs2                   WRITE VERIFY:   off
MAX LPs:            1024                   PP SIZE:        128 megabyte(s)
COPIES:             1                      SCHED POLICY:   parallel
LPs:                480                    PPs:            480
STALE PPs:          0                      BB POLICY:      relocatable
INTER-POLICY:       minimum                RELOCATABLE:    yes
INTRA-POLICY:       middle                 UPPER BOUND:    32
MOUNT POINT:        /u01                   LABEL:          /u01
MIRROR WRITE CONSISTENCY: on/ACTIVE
EACH LP COPY ON A SEPARATE PV ?: yes
Serialize IO ?:     NO
INFINITE RETRY:     no

2.查看rootvg的FREE PPs:

# lsvg rootvg
VOLUME GROUP:       rootvg                   VG IDENTIFIER: 00f8d67e00004c000000014545274d99
VG STATE:           active                   PP SIZE:        128 megabyte(s)
VG PERMISSION:      read/write               TOTAL PPs:      799 (102272 megabytes)
MAX LVs:            256                      FREE PPs:       10 (1280 megabytes)
LVs:                13                       USED PPs:       789 (100992 megabytes)
OPEN LVs:           12                       QUORUM:         2 (Enabled)
TOTAL PVs:          1                        VG DESCRIPTORS: 2
STALE PVs:          0                        STALE PPs:      0
ACTIVE PVs:         1                        AUTO ON:        yes
MAX PPs per VG:     32512
MAX PPs per PV:     1016                     MAX PVs:        32
LTG size (Dynamic): 256 kilobyte(s)          AUTO SYNC:      no
HOT SPARE:          no                       BB POLICY:      relocatable
PV RESTRICTION:     none                     INFINITE RETRY: no

PP SIZE(PP单位)

FREE PPs(PP块数)

FREE PPs: 10 (1280 megabytes) 可以看到只剩下1个G了

3.发现空间不足,进行磁盘扩展

3.1刷新磁盘(若果添加了物理磁盘,需要刷新一下)

# cfgmgr

cfgmgr命令详见

http://blog.sina.com.cn/s/blog_5a2405d10100lbxy.html

3.2查看磁盘使用情况

# lspv
hdisk0          00f8d67e45274d2c                    rootvg          active
hdisk1          none                                None
hdisk2          none                                None
hdisk3          none                                None
hdisk4          none                                None
hdisk5          none                                None
hdisk6          none                                None
hdisk7          none                                None
hdisk8          none                                None
hdisk9          none                                None
hdisk10         none                                None
hdisk11         none                                None
hdisk12         none                                None
hdisk13         none                                None
hdisk14         none                                None
hdisk15         none                                None
hdisk16         none                                None
hdisk17         none                                None
hdisk18         00f8d67efa51a04f                    oggvg           active
hdisk19         00f8d67f77eb5875                    None
hdisk20         00f8d67e3106babe                    datavg          active
hdisk21         00f8d67ee9fbaac8                    oggvg           active
hdisk22         00f8d67fa805f48a                    None
hdisk23         none                                None
.
.

注:查看磁盘空间大小

#bootinfo -s hdisk1

3.3进行扩展,发现报错

#extendvg rootvg hdisk2 hdisk3
0516-1254 extendvg: Changing the PVID in the ODM.
0516-1254 extendvg: Changing the PVID in the ODM.
0516-1162 extendvg: Warning, The Physical Partition Size of 128 requires the
        creation of 1093 partitions for hdisk2. The limitation for volume group
        rootvg is 1016 physical partitions per physical volume. Use chvg command
        with -t option to attempt to change the maximum Physical Partitions per
        Physical volume for this volume group.
0516-1162 extendvg: Warning, The Physical Partition Size of 128 requires the
        creation of 1093 partitions for hdisk3. The limitation for volume group
        rootvg is 1016 physical partitions per physical volume. Use chvg command
        with -t option to attempt to change the maximum Physical Partitions per
        Physical volume for this volume group.
0516-792 extendvg: Unable to extend volume group.
#chdev -l hdisk2 -a pv=yes
#chdev -l hdisk3 -a pv=yes

#chvg -t rootvg
0516-1187 chvg: Volume group not changed. Either the volume group rootvg
        has the specified factor value or is at proper maximum physical partitions
        per physical volume limit already.
0516-732 chvg: Unable to change volume group rootvg.

//因为PP数目已经达到上限

3.4刷新pp

#chvg -t 2 rootvg
0516-1164 chvg: Volume group rootvg changed. With given characteristics rootvg
can include upto 16 physical volumes with 2032 physical partitions each.
//数字2表示2×1016个PP

3.5再次进行扩展

#extendvg rootvg hdisk2 hdisk3

3.6查看磁盘使用情况,发现已经在使用

#lspv
hdisk0          0007df58fb3e71d4                    rootvg          active
hdisk1          00009d03638bf367                    rootvg          active
hdisk2          00009d034caa708d                    rootvg          active
hdisk3          00009d034caa7219                    rootvg          active

3.7查看vg卷的情况,确认已经扩容

#lsvg rootvg
VOLUME GROUP:       rootvg                   VG IDENTIFIER: 0007df580000d70000000113fb3e72ce
VG STATE:           active                   PP SIZE:        128 megabyte(s)
VG PERMISSION:      read/write               TOTAL PPs:      3278 (419584 megabytes)
MAX LVs:            256                      FREE PPs:       2208 (282624 megabytes)
LVs:                60                       USED PPs:       1070 (136960 megabytes)
OPEN LVs:           27                       QUORUM:         1
TOTAL PVs:          4                        VG DESCRIPTORS: 4
STALE PVs:          0                        STALE PPs:      0
ACTIVE PVs:         4                        AUTO ON:        yes
MAX PPs per VG:     32512
MAX PPs per PV:     2032                     MAX PVs:        16
LTG size (Dynamic): 256 kilobyte(s)          AUTO SYNC:      no
HOT SPARE:          no                       BB POLICY:      relocatable

4.扩容完毕,进行文件系统扩容

#chfs -a size=+500G /u01
0516-787 extendlv: Maximum allocation for logical volume /u01 is 1145.

注：+代表在原来基础上增加500G大小

从这个提示可以看到逻辑卷lv2已经到达最大的pp扩展数

# lslv fslv00
LOGICAL VOLUME:     fslv00                 VOLUME GROUP:   rootvg
LV IDENTIFIER:      00f8d67e00004c000000014545274d99.13 PERMISSION:     read/write
VG STATE:           active/complete        LV STATE:       opened/syncd
TYPE:               jfs2                   WRITE VERIFY:   off
MAX LPs:            1024                   PP SIZE:        128 megabyte(s)
COPIES:             1                      SCHED POLICY:   parallel
LPs:                480                    PPs:            480
STALE PPs:          0                      BB POLICY:      relocatable
INTER-POLICY:       minimum                RELOCATABLE:    yes
INTRA-POLICY:       middle                 UPPER BOUND:    32
MOUNT POINT:        /u01                   LABEL:          /u01
MIRROR WRITE CONSISTENCY: on/ACTIVE
EACH LP COPY ON A SEPARATE PV ?: yes
Serialize IO ?:     NO
INFINITE RETRY:     no

已经超过max值了

重新调整pp的max值

# smit chlv
                                                       Change a Logical Volume
Move cursor to desired item and press Enter.
  Change a Logical Volume
Rename a Logical Volume


                                                       Change a Logical Volume
Type or select a value for the entry field.
Press Enter AFTER making all desired changes.
                                                        [Entry Fields]
* LOGICAL VOLUME name             [fslv00(填写正确的lv名字)]

                                                        Change a Logical Volume
Type or select values in entry fields.
Press Enter AFTER making all desired changes.

                                                        [Entry Fields]
* Logical volume NAME                                 fslv00
Logical volume TYPE                                [jfs2]                                                                       +
POSITION on physical volume                         middle                                                                      +
RANGE of physical volumes                           minimum                                                                     +
MAXIMUM NUMBER of PHYSICAL VOLUMES                 [32]                                                                          #
    to use for allocation
Allocate each logical partition copy                yes                                                                         +
    on a SEPARATE physical volume?
RELOCATE the logical volume during                  yes                                                                         +
    reorganization?
Logical volume LABEL                               [/u01]
  MAXIMUM NUMBER of LOGICAL PARTITIONS               [1024(更改)]                                                                        #
SCHEDULING POLICY for writing/reading               parallel                                                                    +
    logical partition copies
PERMISSIONS                                         read/write                                                                  +
Enable BAD BLOCK relocation?                        yes                                                                         +
Enable WRITE VERIFY?                                no                                                                          +
Mirror Write Consistency?                           active                                                                      +
Serialize IO?                                       no                                                                          +
Mirror Pool for First Copy                                                                                                      +
Mirror Pool for Second Copy                                                                                                     +
Mirror Pool for Third Copy                                                                                                      +
Infinite Retry Option                               no