映射的光纤盘无法访问，什么原因，如何解决

一台NETAPP的存储，通过光纤光纤机，映射给AIX小机P780的第3个分区，原来挺好用的，后来10.31下午出问题了，11.1又重新通过NETAPP这台存储把光纤盘分配给这台小机的其它分区，都能正常读写，但是就是分配给第3分区，就出错，分配PVID就报错。这信息如下：

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[50.180/]

[50.180/]lspv

hdisk0          00f8be406510f56a                    rootvg          active

hdisk1          00f80a6cfbed1ffb                    rootvg          active

hdisk2          none                                None            

[50.180/]lsdev -Cc disk

hdisk0 Available 03-00-00 SAS Disk Drive

hdisk1 Available 03-00-00 SAS Disk Drive

hdisk2 Available 02-00-02 MPIO NetApp FCP Default PCM Disk

[50.180/]lspath

Enabled   hdisk0 sas0

Enabled   hdisk1 sas0

Available ses0   sas0

Available ses1   sas0

Failed    hdisk2 fscsi0

Failed    hdisk2 fscsi0

Failed    hdisk2 fscsi2

Failed    hdisk2 fscsi2

[50.180/]lsdev |grep fcs

fcs0       Available 02-00    8Gb PCI Express Dual Port FC Adapter (df1000f114108a03)

fcs1       Available 02-01    8Gb PCI Express Dual Port FC Adapter (df1000f114108a03)

fcs2       Available 00-00    8Gb PCI Express Dual Port FC Adapter (df1000f114108a03)

fcs3       Available 00-01    8Gb PCI Express Dual Port FC Adapter (df1000f114108a03)

[50.180/]set -o vi

[50.180/]chdev -l hdisk2 -a pv=clear

Method error (/usr/lib/methods/chgdisk):

        0514-047 Cannot access a device.

     pv     

[50.180/]chdev -l hdisk2 -a pv=yes

Method error (/usr/lib/methods/chgdisk):

        0514-047 Cannot access a device.

     pv     

[50.180/]rmdev -Rdl fcs0

fcnet0 deleted

fscsi0 deleted

fcs0 deleted

[50.180/]rmdev -Rdl fcs1

fcnet1 deleted

fscsi1 deleted

fcs1 deleted

[50.180/]rmdev -Rdl fcs2

fcnet2 deleted

hdisk2 deleted

fscsi2 deleted

fcs2 deleted

[50.180/]rmdev -Rdl fcs3

fcnet3 deleted

fscsi3 deleted

fcs3 deleted

[50.180/]cfgmgr

[50.180/]lspath

Enabled   hdisk0 sas0

Enabled   hdisk1 sas0

Available ses0   sas0

Available ses1   sas0

Enabled   hdisk2 fscsi0

Enabled   hdisk2 fscsi0

Enabled   hdisk2 fscsi2

Enabled   hdisk2 fscsi2

[50.180/]lspv

hdisk0          00f8be406510f56a                    rootvg          active

hdisk1          00f80a6cfbed1ffb                    rootvg          active

hdisk2          none                                None            

[50.180/]lsdev -Cc disk

hdisk0 Available 03-00-00 SAS Disk Drive

hdisk1 Available 03-00-00 SAS Disk Drive

hdisk2 Available 02-00-02 MPIO NetApp FCP Default PCM Disk

[50.180/]lsdev -Cc apapter

[50.180/]lsdev -Cc adapter

ent0    Available 01-00 2-Port 10/100/1000 Base-TX PCI-Express Adapter (14104003)

ent1    Available 01-01 2-Port 10/100/1000 Base-TX PCI-Express Adapter (14104003)

ent2    Available 05-00 2-Port 10/100/1000 Base-TX PCI-Express Adapter (14104003)

ent3    Available 05-01 2-Port 10/100/1000 Base-TX PCI-Express Adapter (14104003)

fcs0    Available 02-00 8Gb PCI Express Dual Port FC Adapter (df1000f114108a03)

fcs1    Available 02-01 8Gb PCI Express Dual Port FC Adapter (df1000f114108a03)

fcs2    Available 00-00 8Gb PCI Express Dual Port FC Adapter (df1000f114108a03)

fcs3    Available 00-01 8Gb PCI Express Dual Port FC Adapter (df1000f114108a03)

sissas0 Available 03-00 PCI Express x8 Ext Dual-x4 3Gb SAS Adapter

sissas1 Defined   04-00 PCI Express x8 Ext Dual-x4 3Gb SAS Adapter

vsa0    Available       LPAR Virtual Serial Adapter

[50.180/]chdev -l hdisk2 -a pv=clear

Method error (/usr/lib/methods/chgdisk):

        0514-047 Cannot access a device.

     pv     

[50.180/]chdev -l hdisk2 -a pv=yes  

Method error (/usr/lib/methods/chgdisk):

        0514-047 Cannot access a device.

     pv     

[50.180/]lspath

Enabled   hdisk0 sas0

Enabled   hdisk1 sas0

Available ses0   sas0

Available ses1   sas0

Failed    hdisk2 fscsi0

Failed    hdisk2 fscsi0

Failed    hdisk2 fscsi2

Failed    hdisk2 fscsi2