測試方式如下:
用SSV,assign一顆Virtual Disk給ESX5.0 
格式化成VMFS5,並寫入一些資料
接著,將該Virtual Disk 卸載從ESX5.0,再mapping給Windows,刪除該volume,導致VMFS ID消失。
重新掛給ESX5.0,VMFS DataStore變成全新的,資料當然也找不到。
 
 
首先要先刪除第二個partition才可以喔!
partedUtil delete "/vmfs/devices/disks/mpx.vmhba0:C0:T0:L0" 2
 
然後修復第一個partition
 
修好了!
 
 
 
=================================================================================================================
詳細的啟用方法,以及指令與連結參考 : 
 
ESX5i Enable Troubshooting mode :

F2 --> 選Troubleshooting Options -->

Enable ESXi Shell

Enable SSH

Modify ESXi Shell timeout -->30秒


Alt+F1 切換Console畫面輸入帳號密碼


ls /vmfs/devices/disks/


mpx.vmhba0:C0:T0:L0 <-- disk device

mpx.vmhba0:C0:T0:L0:1 <-- partition 1

mpx.vmhba0:C0:T0:L0:2 <-- partition 2

mpx.vmhba0:C0:T0:L0:3 <-- partition 3

mpx.vmhba0:C0:T0:L0:5 <-- partition 5

naa.60060160205010004265efd36125df11 <-- disk device

naa.60060160205010004265efd36125df11:1 <-- partition 1



show出格式


partedUtil getptbl "/vmfs/devices/disks/DeviceName"


gpt

13054 255 63 209715200         

|     |   |  |

|     |   |  \----- quantity of sectors

|     |   \-------- quantity of sectors per track

|     \------------ quantity of heads

\------------------ quantity of cylinders(13054是100GB)


1 2048 209712509 AA31E02A400F11DB9590000C2911D1B8vmfs 0

| |       |         |                                 |

| |       |         |                                 \--- attribute

| |       |         \------- type

| |       \----------------- ending sector

| \------------------------- starting sector

\--------------------------- partition number



partedUtil showGuids



A: the volume was created as VMFS 3 and was later updated to VMFS 5

B: the volume was freshly formatted and partitioned as VMFS 5


A:

partedUtil setptbl "/vmfs/devices/disks/eui.3238373535393136" gpt "1 128 209712509 AA31E02A400F11DB9590000C2911D1B8 0"


B:
partedUtil setptbl "/vmfs/devices/disks/eui.3238373535393136" gpt "1 2048 209712509 AA31E02A400F11DB9590000C2911D1B8 0"
 
 
這個link比較老舊一點
 

Using partedUtil to recover an esxi5 partition table (從IBM文章找到的有用Link)

Problem(Abstract)

Partition tables have at times been overwritten causing VMFS volumes

to become inaccessible. In esxi5 the partedUtil needs to be used to

recover/recreate the partitions.

Resolving the problem

Besides the difference in using the partedUtil instead of fdisk as in the past, the

biggest challenge is knowing what the end sector must be. fdisk was more helpful

in finding the ending sector. This procedure assumes the full LUN is being used for the partition.

The last sector of a VMFS volume must end on a cylinder boundary. The following

formula can be used to find that sector:

end sector = (C * H * S) -1

C = cylinders

H = Heads

S = Sectors/track

To get the cyclinder/heads/sectors information execute the following query:



# partedUtil get /vmfs/devices/disks/mpx.vmhba1:C0:T4:L0

93990 255 63 1509949440


Collect the info and using the formula:


Cylinders = 93990

Heads = 255

Sectors/track = 63


(93990 * 255 * 63) -1 = 1509949349


The VMFS GUID is AA31E02A400F11DB9590000C2911D1B8


The command to recreate would be the following....


partedUtil setptbl "/vmfs/devices/disks/mpx.vmhba1:C0:T4:L0" gpt "1 2048 1509949349 AA31E02A400F11DB9590000C2911D1B8 0"


To print the table:


partedUtil getptbl "/vmfs/devices/disks/mpx.vmhba1:C0:T4:L0"


The above information was derived from the following web link:

http://communities.vmware.com/message/1990824


======================================================


In addition, I found the following information at this link:

http://www.virtuallyghetto.com/2011/07/how-to-format-and-create-vmfs-volume.html


This information explains different offsets you may encounter. Along with this information

I also observed in the lab that VMFS3 filesystems created in esxi5 have an offset of "2048".


The reference disk used in the web link:


# partedUtil get /dev/disks/eui.3238373535393136

254803 255 63 4093411328


The two kinds of examples demonstrated in the link:


A: the volume was created as VMFS 3 and was later updated to VMFS 5

B: the volume was freshly formatted and partitioned as VMFS 5


The two command examples....


A:

partedUtil setptbl "/vmfs/devices/disks/eui.3238373535393136" gpt "1 128 4093410194 AA31E02A400F11DB9590000C2911D1B8 0"


B:
partedUtil setptbl "/vmfs/devices/disks/eui.3238373535393136" gpt "1 2048 4093410194 AA31E02A400F11DB9590000C2911D1B8 0"


======================================================


Some additional information links:

http://kb.vmware.com/kb/1036609 for partutil information....and GUID information
http://kb.vmware.com/kb/1009829 for some pre-5.0 information.....



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