使用虚设备修改hdisk序号

使用cfgmgr带参数不知道可不可以修改hdisk序号，暂时先不追究，今天试试使用mkdev添加虚设备到系统占用hdisk号 来实施修改hdisk序号。

首先明确下hdisk号在系统中分布规律，hdisk是根据磁盘加入系统的时间，来依次分配的，如果同时加入系统，则根据hdisk的scsi id序号来分配

系统环境：

F50:[/]#lsdev -C | grep scsi

iscsi0      Available               iSCSI Protocol Device

scsi0      Available 10-60         Wide SCSI I/O Controller

scsi1      Available 30-58         Wide SCSI I/O Controller

F50:[/]#lsdev -Cc disk

hdisk0 Available 10-60-00-0,0  16 Bit LVD SCSI Disk Drive

hdisk1 Available 10-60-00-1,0  16 Bit SCSI Disk Drive

hdisk2 Available 10-60-00-8,0  16 Bit SCSI Disk Drive

    F50:[/]#lspv

hdisk0          000af70dca7ae679                    vg00            active

hdisk1          000af70dca7aea4d                    vg00            active

hdisk2          000af70d4d50358c                    rootvg          active

 

其中hdisk0为17g，hdisk1 hdisk2 为9g 大小，由以上可知，hdisk2 为rootvg，由于磁盘所在的scsi id的限制，导致使用cfgmgr 来修改hdisk号 可能要涉及到拔插硬盘，至于带参数先cfgmgr scsi卡，好像也是根据 scsi id 顺序来配置。所以以下通过mkdev来实施。

 

具体思路是：通过镜像来实现系统在hdisk之间的移植，然后通过mkdev 做虚设备来补位填空。

 

以下是具体实施步骤：

Reduce vg00：

F50:[/]#df -k

Filesystem    1024-blocks      Free %Used    Iused %Iused Mounted on

/dev/hd4            32768      3800   89%     2033    13% /

/dev/hd2          1966080     96764   96%    32357     7% /usr

/dev/hd9var         16384      7136   57%      377    10% /var

/dev/hd3            32768     12800   61%      241     3% /tmp

/dev/hd1            16384     15820    4%       21     1% /home

/proc                   -         -    -         -     -  /proc

/dev/hd10opt       114688     23160   80%     2296     9% /opt

/dev/ibmdata      9830400   8357388   15%      443     1% /data

F50:[/]#umount /data

F50:[/]#lsvg -l vg00

vg00:

LV NAME             TYPE       LPs   PPs   PVs  LV STATE      MOUNT POINT

ibmdata             jfs2       300   300   1    closed/syncd  /data

loglv00             jfs2log    1     1     1    closed/syncd  N/A

raw                 raw        12    12    1    closed/syncd  N/A

raw1                raw        3     3     1    closed/syncd  N/A

F50:[/]#df -k

Filesystem    1024-blocks      Free %Used    Iused %Iused Mounted on

/dev/hd4            32768      3800   89%     2033    13% /

/dev/hd2          1966080     96764   96%    32357     7% /usr

/dev/hd9var         16384      7136   57%      377    10% /var

/dev/hd3            32768     12800   61%      241     3% /tmp

/dev/hd1            16384     15820    4%       21     1% /home

/proc                   -         -    -         -     -  /proc

/dev/hd10opt       114688     23160   80%     2296     9% /opt

F50:[/]#rmlv ibmdata

Warning, all data contained on logical volume ibmdata will be destroyed.

rmlv: Do you wish to continue? y(es) n(o)? y

rmlv: Logical volume ibmdata is removed.

F50:[/]#rmlv raw

Warning, all data contained on logical volume raw will be destroyed.

rmlv: Do you wish to continue? y(es) n(o)? y

rmlv: Logical volume raw is removed.

F50:[/]#rmlv rwa  aw1

Warning, all data contained on logical volume raw1 will be destroyed.

rmlv: Do you wish to continue? y(es) n(o)? y

rmlv: Logical volume raw1 is removed.

F50:[/]#rmlv loglv00

Warning, all data contained on logical volume loglv00 will be destroyed.

rmlv: Do you wish to continue? y(es) n(o)? y

rmlv: Logical volume loglv00 is removed.

F50:[/]#reducevg vg00 hdisk0

F50:[/]#lspv

hdisk0          000af70dca7ae679                    None           

hdisk1          000af70dca7aea4d                    vg00            active

hdisk2          000af70d4d50358c                    rootvg          active

F50:[/]#reducevg vg00 hdisk1

ldeletepv: Volume Group deleted since it contains no physical volumes.

F50:[/]#lspv

hdisk0          000af70dca7ae679                    None           

hdisk1          000af70dca7aea4d                    None           

hdisk2          000af70d4d50358c                    rootvg          active

F50:[/]#extendvg rootvg hdisk1

F50:[/]#lspv

hdisk0          000af70dca7ae679                    None           

hdisk1          000af70dca7aea4d                    rootvg          active

hdisk2          000af70d4d50358c                    rootvg          active

F50:[/]#lsdev -Cc disk

hdisk0 Available 10-60-00-0,0  16 Bit LVD SCSI Disk Drive

hdisk1 Available 10-60-00-1,0  16 Bit SCSI Disk Drive

hdisk2 Available 10-60-00-8,0  16 Bit SCSI Disk Drive

 

从系统中删除 hdisk0：

F50:[/]#rmdev -dl hdisk0

hdisk0 deleted

F50:[/]#lsdev -Cc disk

hdisk1 Available 10-60-00-1,0  16 Bit SCSI Disk Drive

hdisk2 Available 10-60-00-8,0  16 Bit SCSI Disk Drive

 

将虚设备加入系统：

 

 F50:[/]#mkdev –p scis 0 –w 3,0 –c disk –s scsi –t scsd –l hdisk0 –d

hdisk0 Defined

此处使用mkdev 创建虚设备，注意scsi id 不要与真实设备的scsi id冲突

 

F50:[/]#lspv

hdisk1          000af70dca7aea4d                    rootvg          active

hdisk2          000af70d4d50358c                    rootvg          active

F50:[/]#lsdev -Cc disk

hdisk0 Defined   10-60-00-3,0  Other SCSI Disk Drive

hdisk1 Available 10-60-00-1,0  16 Bit SCSI Disk Drive

hdisk2 Available 10-60-00-8,0  16 Bit SCSI Disk Drive

 

F50:[/]#cfgmgr

F50:[/]#lsdev -Cc disk

hdisk0 Defined   10-60-00-3,0 Other SCSI Disk Drive

hdisk1 Available 10-60-00-1,0 16 Bit SCSI Disk Drive

hdisk2 Available 10-60-00-8,0 16 Bit SCSI Disk Drive

hdisk3 Available 10-60-00-0,0 16 Bit LVD SCSI Disk Drive

 

镜像rootvg：以此将系统镜像到 hdisk1

 

F50:[/]#lspv

hdisk1          000af70dca7aea4d                    rootvg          active

hdisk2          000af70d4d50358c                    rootvg          active

hdisk3          000af70dca7ae679                    None            

 

 

F50:[/]#chvg -Qn rootvg

F50:[/]#mirrorvg -S rootvg hdisk1 hdisk2

0516-1126 mirrorvg: rootvg successfully mirrored, user should perform

        bosboot of system to initialize boot records.  Then, user must modify

        bootlist to include:  hdisk2 hdisk1.

F50:[/]#lsvg -l rootvg

rootvg:

LV NAME             TYPE       LPs   PPs   PVs  LV STATE      MOUNT POINT

hd5                 boot       1     2     2    closed/syncd  N/A

hd6                 paging     32    64    2    open/syncd    N/A

hd8                 jfslog     1     2     2    open/syncd    N/A

hd4                 jfs        2     4     2    open/syncd    /

hd2                 jfs        120   240   2    open/syncd    /usr

hd9var              jfs        1     2     2    open/syncd    /var

hd3                 jfs        2     4     2    open/syncd    /tmp

hd1                 jfs        1     2     2    open/syncd    /home

hd10opt             jfs        7     14    2    open/syncd    /opt

F50:[/]# bosboot -a

 

bosboot: Boot image is 23229 512 byte blocks.

F50:[/]#bootlist -m normal hdisk1 hdisk2 cd0

F50:[/]#syncvg -v rootvg

F50:[/]#bosboot -a

 

bosboot: Boot image is 23229 512 byte blocks.

 

镜像后，将hdisk2 剔出：

F50:[/]#unmirrorvg rootvg hdisk2

0516-1246 rmlvcopy: If hd5 is the boot logical volume, please run 'chpv -c '

0516-1246 rmlvcopy: If hd5 is the boot logical volume, please run 'chpv -c '

        as root user to clear the boot record and avoid a potential boot

        off an old boot image that may reside on the disk from which this

        logical volume is moved/removed.

0516-1132 unmirrorvg: Quorum requirement turned on, reboot system for this

        to take effect for rootvg.

0516-1144 unmirrorvg: rootvg successfully unmirrored, user should perform

        bosboot of system to reinitialize boot records.  Then, user must modify

        bootlist to just include:  hdisk1.

F50:[/]#lspv

hdisk1          000af70dca7aea4d                    rootvg          active

hdisk2          000af70d4d50358c                    rootvg          active

hdisk3          000af70dca7ae679                    None           

F50:[/]#lsvg -l rootvg

rootvg:

LV NAME             TYPE       LPs   PPs   PVs  LV STATE      MOUNT POINT

hd5                 boot       1     1     1    closed/syncd  N/A

hd6                 paging     32    32    1    open/syncd    N/A

hd8                 jfslog     1     1     1    open/syncd    N/A

hd4                 jfs        2     2     1    open/syncd    /

hd2                 jfs        120   120   1    open/syncd    /usr

hd9var              jfs        1     1     1    open/syncd    /var

hd3                 jfs        4     4     1    open/syncd    /tmp

hd1                 jfs        1     1     1    open/syncd    /home

hd10opt             jfs        7     7     1    open/syncd    /opt

F50:[/]#reducevg rootvg hdisk2

F50:[/]#bosboot -a

 

0301-168 bosboot: The current boot logical volume, /dev/hd5,

        does not exist on /dev/hdisk2.

F50:[/]#chpv -c hdisk2

F50:[/]#bosboot -ad /dev/hdisk1

 

bosboot: Boot image is 23229 512 byte blocks.

F50:[/]#bootlist -m norman hdisk1 cd0

F50:[/]#bootlist -m normal -o

hdisk1 blv=hd5

cd0

F50:[/]#lspv

hdisk1          000af70dca7aea4d                    rootvg          active

hdisk2          000af70d4d50358c                    None           

hdisk3          000af70dca7ae679                    None           

F50:[/]#lsdev -c Cc disk

hdisk0 Defined   10-60-00-3,0 Other SCSI Disk Drive

hdisk1 Available 10-60-00-1,0 16 Bit SCSI Disk Drive

hdisk2 Available 10-60-00-8,0 16 Bit SCSI Disk Drive

hdisk3 Available 10-60-00-0,0 16 Bit LVD SCSI Disk Drive

 

 

删除hdisk0 并将hdisk2 更改为hdik0，hdisk3改为hdisk2：

F50:[/]#rmdev -a dl hdisk0

hdisk0 deleted

F50:[/]#rmdev -dl hdisk2

hdisk2 deleted

F50:[/]#lspv

hdisk1          000af70dca7aea4d                    rootvg          active

hdisk3          000af70dca7ae679                    None           

F50:[/]#lsdev -Cc disk

hdisk1 Available 10-60-00-1,0 16 Bit SCSI Disk Drive

hdisk3 Available 10-60-00-0,0 16 Bit LVD SCSI Disk Drive

F50:[/]#cfgmgr

F50:[/]#lspv

hdisk0          000af70d4d50358c                    None           

hdisk1          000af70dca7aea4d                    rootvg          active

hdisk3          000af70dca7ae679                    None           

F50:[/]#lsdev -Cc disk

hdisk0 Available 10-60-00-8,0 16 Bit SCSI Disk Drive

hdisk1 Available 10-60-00-1,0 16 Bit SCSI Disk Drive

hdisk3 Available 10-60-00-0,0 16 Bit LVD SCSI Disk Drive

F50:[/]#rmdev -dl hdisk3

hdisk3 deleted

F50:[/]#cfgmgr

F50:[/]#lspv

hdisk0          000af70d4d50358c                    None           

hdisk1          000af70dca7aea4d                    rootvg          active

hdisk2          000af70dca7ae679                    None           

F50:[/]#lsdev -Cc disk

hdisk0 Available 10-60-00-8,0 16 Bit SCSI Disk Drive

hdisk1 Available 10-60-00-1,0 16 Bit SCSI Disk Drive

hdisk2 Available 10-60-00-0,0 16 Bit LVD SCSI Disk Drive

 

至此，所有更改完成，如果有需要，可以通过镜像 再将系统 镜像到hdisk0上。

 

重启机器：

F50:[/]#shutdown –Fr

 

启动后： 

F50:[/]#lspv

hdisk0          000af70d4d50358c                    rootvg          active

hdisk1          000af70dca7aea4d                    None

hdisk2          000af70dca7ae679                    None

 

  其实，不用借助虚设备，直接使用mkdev 命令对实际磁盘操作，将简单许多

F50:[/]#mkdev -p scsi0 -w 1,0 -c disk -s scsi -t scsd -l hdisk2
hdisk2 Available
注意 以上没加－d 参数，设备状态将为available