AIX-磁盘状态为missing问题的解决方法

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2023年12月21日发(作者：)

AIX 磁盘状态为missing问题的解决

由于本地备份空间不够，加入了一个存储上面的磁盘(LUN),这样就造成了备份用的这个VG是本地磁盘和存储磁盘混用了，最近通过监控发现存储其中一个控制器存在故障，初步诊断为光纤模块存在问题，这个时候如果另外一个控制器出现故障就会导致整个存储不能用，防止单点故障需要停存储进行更换控制器，在维护过程中我们只把存储停了，但是AIX主机并没有关机，当存储启来后我们重启了操作系统

AIX操作系统版本:

# oslevel -s

6100-06-01-1043

存储类型

IBM DS5200

问题描述和诊断过程

1.当重启操作系统后发现/backup挂载不上，手动挂载报错如下：

bash-3.00# mount /backup

Replaying log for /dev/backuplv.

Fatal: I/O error

mount: 0506-324 Cannot mount /dev/backuplv on /backup: The media is not

formatted or the format is not correct.

0506-342 The superblock on /dev/backuplv is dirty. Run a full fsck to

fix.

bash-3.00#

2.根据上面提示手动执行fsck后问题还是一样，查看对应用的LV，再根据对应的LV查看对应的磁盘，发现其中一磁盘，也就是存储上面的一个磁盘状态为missing

bash-3.00# more /etc/filesystems/backup:

dev = /dev/backuplv

vfs = jfs2

log = /dev/loglv00

mount = true

options = rw

account = false

bash-3.00# lsvg -l backupvg

backupvg:

LV NAME TYPE LPs PPs PVs LV

STATE MOUNT POINT

backuplv jfs2 3600 3600 3

open/syncd /backup

loglv00 jfs2log 1 1

1 open/syncd N/A

bash-3.00# lspv|grep backupvg

hdisk2 00f6886135525b61

backupvg active

hdisk3 00f6886135525c3b

backupvg active

hdisk20 00f6886132cfde40

backupvg missing

bash-3.00# lspv hdisk20

PHYSICAL

VOLUME: hdisk20 VOLUME

GROUP: backupvg

PV IDENTIFIER: 00f6886132cfde40 VG

IDENTIFIER 00f6886100004c000000012f35525ca0

PV

STATE: missing

STALE

PARTITIONS: 0 ALLOCATABLE: yes

PP SIZE: 256

megabyte(s) LOGICAL VOLUMES: 0

TOTAL PPs: 1459 (373504 megabytes) VG

DESCRIPTORS: 1

FREE PPs: 1459 (373504 megabytes) HOT

SPARE: no

USED PPs: 0 (0 megabytes) MAX

REQUEST: 256 kilobytes

FREE

DISTRIBUTION: 292..292..291..292..292

USED

DISTRIBUTION: 00..00..00..00..00

MIRROR

POOL: None

bash-3.00#

3.试图使用smit chpv把Physical volume STATE从no active改为active,执行过程中没有报错，但是执行成功后，状态还是没有变，说明这个方法行不通

上面执行成功了，状态和原来一样，说明这个方法无效

bash-3.00# lspv hdisk20

PHYSICAL

VOLUME: hdisk20 VOLUME

GROUP: backupvg

PV IDENTIFIER: 00f6886132cfde40 VG

IDENTIFIER 00f6886100004c000000012f35525ca0

PV

STATE: missing

STALE

PARTITIONS: 0 ALLOCATABLE: yes

PP SIZE: 256

megabyte(s) LOGICAL VOLUMES: 0

TOTAL PPs: 1459 (373504 megabytes) VG

DESCRIPTORS: 1

FREE PPs: 1459 (373504 megabytes) HOT

SPARE: no

USED PPs: 0 (0 megabytes) MAX

REQUEST: 256 kilobytes

FREE

DISTRIBUTION: 292..292..291..292..292

USED

DISTRIBUTION: 00..00..00..00..00

MIRROR

POOL: None

bash-3.00#

解决方案

重建步骤如下：

先使用smit rmfs把backup文件和LV删除再把这个这个hdisk20磁盘从backupvg中卸载，最后把这个磁盘添加到backupvg中去，以下为操作日志

bash-3.00# smit reducevg

Remove a Physical Volume from a Volume Group

Type or select values in entry fields.

Press Enter AFTER making all desired changes.

[Entry Fields]

* VOLUME GROUP name backupvg

* PHYSICAL VOLUME names [hdisk20]

FORCE deallocation of all partitions

on no

this physical volume?

F1=Help F2=Re+-- F4=List

Esc+5=Reset Esc+6| Running

| Esc+8=Image

Esc+9=Shell Esc+0+---- COMMAND STATUS

Command: running stdout: no stderr: no

Before command completion, additional instructions may appear below.

Reduce a Volume Group

Move cursor to desired item and press Enter.

Remove a Physical Volume from a Volume Group

Remove a Volume

Group

F1=Help F2=Refresh F3=Cancel Esc+8=Image

Esc+9=Shell Esc+0=Exit Enter=Do

bash-3.00# lspv

hdisk0 00f68861b9e00f54

rootvg active

hdisk1 00f688611026530f

rootvg active

hdisk2 00f6886135525b61

backupvg active

hdisk3 00f6886135525c3b

backupvg active

hdisk20 00f6886132cfde40

None

bash-3.00# smit extendvg

Add a Physical Volume to a Volume Group

Type or select values in entry fields.

Press Enter AFTER making all desired changes.

[Entry Fields]

Force the creation of a volume

group? no

+

* VOLUME GROUP

name

[backupvg]

+

* PHYSICAL VOLUME

names [hdisk20]

+

COMMAND STATUS

Command: running stdout: yes stderr:

no

Before command completion, additional instructions may appear below.

0516-1398 /usr/sbin/extendvg: The physical volume hdisk20, appears to

belong to

another volume group. Use the force option to add this physical volume

to a volume group.

0516-792 /usr/sbin/extendvg: Unable to extend volume group.

Add a Physical Volume to a Volume Group

Type or select values in entry fields.

Press Enter AFTER making all desired changes.

[Entry Fields]

Force the creation of a volume

group? yes

* VOLUME GROUP

name [backupvg]

* PHYSICAL VOLUME

names [hdisk20]

bash-3.00# lspv hdisk20

PHYSICAL VOLUME: hdisk20 VOLUME

GROUP: backupvg

PV IDENTIFIER: 00f6886132cfde40 VG

IDENTIFIER 00f6886100004c000000012f35525ca0

PV

STATE: active

STALE

PARTITIONS: 0 ALLOCATABLE: yes

PP SIZE: 256

megabyte(s) LOGICAL VOLUMES: 0

TOTAL PPs: 1459 (373504 megabytes) VG

DESCRIPTORS: 1

FREE PPs: 1459 (373504 megabytes) HOT

SPARE: no

USED PPs: 0 (0 megabytes) MAX

REQUEST: 256 kilobytes

FREE

DISTRIBUTION: 292..292..291..292..292

USED

DISTRIBUTION: 00..00..00..00..00

MIRROR

POOL: None

bash-3.00#

总结

在维护存储时，如果有服务器挂载了这些磁盘，务必停掉服务器或者umount相关的文件系统再进行操作.

本文标签： 磁盘问题控制器执行过程