AIX 在硬盘rootvg上做操作系统备份mksysback方法

来源：互联网发布：人工智能城市规划编辑：程序博客网时间：2024/05/17 23:07

原文：http://blogold.chinaunix.net/u/32679/showart.php?id=2268613

AIX 在硬盘上做操作系统备份mksysback，备份rootvg

说明：操作系统V6R1 ，系统中只有一个VG rootvg

注意：smit的log在根目录下smit.log可以查看该文件便于查询故障，硬盘系统备份无法引导系统，需要配置NAM才能做恢复测试

先用root账户登录系统

l 步骤1： lsvg rootvg检查评估rootvg大小，如下USED PPS.

# lsvg rootvg

VOLUME GROUP: rootvg VG IDENTIFIER: 00c03c1400004c000000012949aa4906

VG STATE: active PP SIZE: 256 megabyte(s)

VG PERMISSION: read/write TOTAL PPs: 1092 (279552 megabytes)

MAX LVs: 256 FREE PPs: 1010 (258560 megabytes)

LVs: 13 USED PPs: 82 (20992 megabytes)

OPEN LVs: 11 QUORUM: 2 (Enabled)

TOTAL PVs: 2 VG DESCRIPTORS: 3

STALE PVs: 0 STALE PPs: 0

ACTIVE PVs: 2 AUTO ON: yes

MAX PPs per VG: 32512

MAX PPs per PV: 1016 MAX PVs: 32

LTG size (Dynamic): 1024 kilobyte(s) AUTO SYNC: no

HOT SPARE: no BB POLICY: relocatable

l 步骤二：检查系统文件系统那些还有足够空间存放备份文件df –g如下，若有必要扩空间

# df -g

Filesystem GB blocks Free %Used Iused %Iused Mounted on

/dev/hd4 0.50 0.32 36% 13031 15% /

/dev/hd2 3.50 0.81 77% 45658 20% /usr

/dev/hd9var 2.00 1.69 16% 9269 3% /var

/dev/hd3 0.25 0.09 65% 112 1% /tmp

/dev/hd1 10.00 6.95 31% 50 1% /home

/dev/hd11admin 0.25 0.25 1% 5 1% /admin

/proc - - - - - /proc

/dev/hd10opt 0.50 0.31 39% 8697 11% /opt

/dev/livedump 0.25 0.25 1% 4 1% /var/adm/ras/livedump

/dev/fslv00 1.00 0.75 25% 5 1% /wujtest

如下；/home 空间较多

若/home 空间不足参考如下如增加/home目录空间，

先lsvg rootvg 确认vg中有足够可用FREE PP

# lsvg rootvg

VOLUME GROUP: rootvg VG IDENTIFIER: 00c03c1400004c000000012949aa4906

VG STATE: active PP SIZE: 256 megabyte(s)

VG PERMISSION: read/write TOTAL PPs: 1092 (279552 megabytes)

MAX LVs: 256 FREE PPs: 1010 (258560 megabytes)

LVs: 13 USED PPs: 82 (20992 megabytes)

OPEN LVs: 11 QUORUM: 2 (Enabled)

TOTAL PVs: 2 VG DESCRIPTORS: 3

STALE PVs: 0 STALE PPs: 0

ACTIVE PVs: 2 AUTO ON: yes

MAX PPs per VG: 32512

MAX PPs per PV: 1016 MAX PVs: 32

LTG size (Dynamic): 1024 kilobyte(s) AUTO SYNC: no

HOT SPARE: no BB POLICY: relocatable

运行命令smit chfs

选择Change /Show Characteristics of an Enhanced Journaled File System

再选择你需要扩的LV的mount point比如我需要的/home

先定位光标在UnitSize 中按F4选择Gigabytes 修改以G为单位

在Number ofunits输入要把/home扩到多大比如11G 就输入11

按执行键执行，等运行完成确认执行结果正常Command: OK

COMMAND STATUS

Command: OK stdout: yes stderr: no

Before command completion, additional instructions may appear below.

Filesystem size changed to 23068672

df –g命令查看确认/home空间已经扩展成功为11G

# df -g

Filesystem GB blocks Free %Used Iused %Iused Mounted on

/dev/hd4 0.50 0.32 36% 13031 15% /

/dev/hd2 3.50 0.81 77% 45658 20% /usr

/dev/hd9var 2.00 1.69 16% 9266 3% /var

/dev/hd3 0.25 0.09 65% 112 1% /tmp

/dev/hd1 11.00 7.95 28% 50 1% /home

/dev/hd11admin 0.25 0.25 1% 5 1% /admin

/proc - - - - - /proc

/dev/hd10opt 0.50 0.31 39% 8697 11% /opt

/dev/livedump 0.25 0.25 1% 4 1% /var/adm/ras/livedump

/dev/fslv00 1.00 0.75 25% 5 1% /wujtest

l 用touch命令在/home目录下创建备份空文件

cd/home 修改当前目录

touch sysbackup

注意：空文件一定要先建立否则mksysb无法备份成功，会有如下提示

报错信息：

COMMAND STATUS

Command: failed stdout: yes stderr: no

Before command completion, additional instructions may appear below.

Creating information file (/image.data) for rootvg.

Creating list of files to back up.

Backing up 78651 files
backup: 0511-089 Cannot open /home/sysbackup: Cannot write to a directory.

0512-005 mksysb: Backup Completed.
        The backup command completed with errors.
        The messages displayed on Standard Error contained additional
        information.

l 检查系统文件限制 /etc/security/limits文件，修改root账户文件大小不限制

运行命令more /etc/security/limits

default:

fsize = 2097151

core = 2097151

cpu = -1

data = 262144

rss = 65536

stack = 65536

nofiles = 2000

调用vi命令在/etc/security/limits 增加如下一行

root:

fsize = -1

default:

fsize = 2097151

core = 2097151

cpu = -1

data = 262144

rss = 65536

stack = 65536

nofiles = 2000

root:

fsize = -1

注意：若文件有限制smit mksysb会有如下提示

backup: 0511-432 A write error occurred: A file cannot be larger than the value set by ulimit.
backup: 0511-079 The backup media may be damaged.
Use a different disk to run the backup.

l 发起备份 smit mksysb

在Backup DEVICEor FILE选项输入备份文件和路径例如/home/sysbackup20100708

Backup DEVICE or FILE [/home/sysbackup20100708]

备份完成之后会有报表提示OK表示备份成功,如下，会有/var/tmp 目录临时文件系统提示无法备份属于正常，备份之后smit的log在根目录下smit.log可以查看该文件便于查询故障，硬盘系统备份无法引导系统，需要配置NAM才能做恢复测试

COMMAND STATUS

Command: OK stdout: yes stderr: no

Before command completion, additional instructions may appear below.

Creating information file (/image.data) for rootvg.

Creating list of files to back up.

Backing up 78652 files.....backup: 0511-089 Cannot open ./var/tmp/slp_srvreg.lock: Cannot open or remove a file containing a
running program.
.....................

0512-003 mksysb may not have been able to archive some files.
The messages displayed on the Standard Error contained additional
information.

发表于： 2010-07-08，修改于： 2010-07-08 17:51，已浏览1315次，有评论2条推荐投诉