AIX下查看磁盤的相關命令

1.aix下rhdisk和hdisk的區別是什么？

rhdisk為字符設備，hdisk為塊設備。塊設備可以隨機存取，而字符設備不能隨機存取。

2.如何查看磁盤的屬性？（查看磁盤的屬性信息，其中reserve_policy對於集群來說比較重要。）

root@itgs1:/dev$ lsattr -El hdisk4
PCM             PCM/friend/NetAppDefaultPCM Path Control Module              False
PR_key_value    none                        Persistant Reserve Key Value     True
algorithm       round_robin                 Algorithm                        True
clr_q           no                          Device CLEARS its Queue on error True
dist_err_pcnt   0                           Distributed Error Sample Time    True
dist_tw_width   50                          Distributed Error Sample Time    True
hcheck_cmd      inquiry                     Health Check Command             True
hcheck_interval 30                          Health Check Interval            True
hcheck_mode     nonactive                   Health Check Mode                True
location                                    Location Label                   True
lun_id          0x1000000000000             Logical Unit Number ID           False
lun_reset_spt   yes                         LUN Level Reset                  True
max_transfer    0x40000                     Maximum TRANSFER Size            True
node_name       0x500a09808f40d1d2          FC Node Name                     False
pvid            none                        Physical volume identifier       False
q_err           yes                         Use QERR bit                     True
q_type          simple                      Queuing TYPE                     True
queue_depth     8                           Queue DEPTH                      True
reassign_to     120                         REASSIGN time out value          True
reserve_policy  no_reserve                  Reserve Policy                   True
rw_timeout      30                          READ/WRITE time out value        True
scsi_id         0x92e00                     SCSI ID                          False
start_timeout   60                          START unit time out value        True
ww_name         0x500a09859f40d1d2          FC World Wide Name               False
root@itgs1:/dev$ 

3.如何查看磁盤頭信息

root@itgs1:/$ lquerypv -h  hdisk7
============= B: HEADER /dev/rhdisk7 ============= 
00000000   00820101 00000000 80000003 AB36078C  |.............6..|
00000010   00000000 00000000 00000000 00000000  |................|
00000020   4F52434C 4449534B 00000000 00000000  |ORCLDISK........|
00000030   00000000 00000000 00000000 00000000  |................|
00000040   0B200000 00030103 44415441 5F303030  |. ......DATA_000|
00000050   33000000 00000000 00000000 00000000  |3...............|
00000060   00000000 00000000 44415441 00000000  |........DATA....|
00000070   00000000 00000000 00000000 00000000  |................|
00000080   00000000 00000000 44415441 5F303030  |........DATA_000|
00000090   33000000 00000000 00000000 00000000  |3...............|
000000A0   00000000 00000000 00000000 00000000  |................|
000000B0   00000000 00000000 00000000 00000000  |................|
000000C0   00000000 00000000 01F720EF 36E71C00  |.......... .6...|
000000D0   01F82F4A 66327000 02001000 00100000  |../Jf2p.........|
000000E0   0001BC80 00019000 00000002 00000001  |................|
000000F0   00000002 00000000 00000000 00000000  |................|
============= E: HEADER ============= 

 

4.如何在兩個節點確認兩塊盤為同一塊磁盤？

可通過對比 dfY3KZlXzMTL來比較兩個節點的磁盤是否為同一塊磁盤

oracle@itgs1:/dev$ lscfg -vpl hdisk4
  hdisk4           U9179.MHC.1010B0T-V7-C11-T1-W500A09859F40D1D2-L1000000000000  MPIO NetApp FCP Default PCM Disk

        Manufacturer................NETAPP  
        Machine Type and Model......LUN             
        ROS Level and ID............811a
        Serial Number...............dfY3KZlXzMTL
        Device Specific.(Z0)........FAS6240         


  PLATFORM SPECIFIC

  Name:  disk
    Node:  disk
    Device Type:  block