Hello, my ESXI 4.0 missed the OS suddenly, after I used CD to repair,
the datastore is gone, anyone know how can I get back the data?

/dev/disks # ls -l /vmfs/devices/disks
-rw------- 1 root root 0 Dec 8 11:35 mpx.vmhba33:C0:T0:L1
-rw------- 1 root root 298999349248 Dec 8 11:35 naa.600508e00000 0000 18c538f794cde70f
-rw------- 1 root root 939524096 Dec 8 11:35 naa.600508e00000000018c538f794cde70f:1
-rw------- 1 root root 4177920 Dec 8 11:35 naa.600508e00000000018c538f794cde70f:4
-rw------- 1 root root 262127616 Dec 8 11:35 naa.600508e00000000018c538f794cde70f:5
-rw------- 1 root root 262127616 Dec 8 11:35 naa.600508e00000000018c538f794cde70f:6
-rw------- 1 root root 115326976 Dec 8 11:35 naa.600508e00000000018c538f794cde70f:7
-rw------- 1 root root 299876352 Dec 8 11:35 naa.600508e00000000018c538f794cde70f:8
l--------- 0 root root 1984 Jan 1 1970 vml.0000010000766d68626133333a303a31 -> mpx.vmhba33:C0:T0:L1
l--------- 0 root root 1984 Jan 1 1970 vml.0200000000600508e00000000018c538f794cde70f4c6f67696361 -> naa.600508e00000000018c538f794cde70f
l--------- 0 root root 1984 Jan 1 1970 vml.0200000000600508e00000000018c538f794cde70f4c6f67696361:1 -> naa.600508e00000000018c538f794cde70f:1
0200000000600508e00000000018cf38f794cde70f4c6f67696361
l--------- 0 root root 1984 Jan 1 1970 vml.0200000000600508e00000000018c538f794cde70f4c6f67696361:4 -> naa.600508e00000000018c538f794cde70f:4
l--------- 0 root root 1984 Jan 1 1970 vml.0200000000600508e00000000018c538f794cde70f4c6f67696361:5 -> naa.600508e00000000018c538f794cde70f:5
l--------- 0 root root 1984 Jan 1 1970 vml.0200000000600508e00000000018c538f794cde70f4c6f67696361:6 -> naa.600508e00000000018c538f794cde70f:6
l--------- 0 root root 1984 Jan 1 1970 vml.0200000000600508e00000000018c538f794cde70f4c6f67696361:7 -> naa.600508e00000000018c538f794cde70f:7
l--------- 0 root root 1984 Jan 1 1970 vml.0200000000600508e00000000018c538f794cde70f4c6f67696361:8 -> naa.600508e00000000018c538f794cde70f:8

Can you post the output of fdisk -l ?

~ # fdisk -l

Disk /dev/disks/naa.600508e00000000018c538f794cde70f: 298.9 GB, 298999349248 bytes
64 heads, 32 sectors/track, 285148 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes

Device Boot Start End Blocks Id System
/dev/disks/naa.600508e00000000018c538f794cde70fp1 5 900 917504 5 Extended
/dev/disks/naa.600508e00000000018c538f794cde70fp2 901 285148 291069952 fb VMFS
/dev/disks/naa.600508e00000000018c538f794cde70fp4 * 1 4 4080 4 FAT16 <32M
/dev/disks/naa.600508e00000000018c538f794cde70fp5 5 254 255984 6 FAT16
/dev/disks/naa.600508e00000000018c538f794cde70fp6 255 504 255984 6 FAT16
/dev/disks/naa.600508e00000000018c538f794cde70fp7 505 614 112624 fc VMKcore
/dev/disks/naa.600508e00000000018c538f794cde70fp8 615 900 292848 6 FAT16

Partition table entries are not in disk order

Did you go to Configuration > Storage and try a rescan? What sort of hardware are you using?

Yes, I re-scanned, please see the attached jpg,
the server is IBM Blade HS22, w/SAS RAID 1.

I also tried that

/dev/disks # vmkfstools -C vmfs3 -b 8M -S "datastore2" /vmfs/devices/disks/naa.600508e00000000018c538f794cde70f
Creating vmfs3 file system on "naa.600508e00000000018c538f794cde70f" with blockSize 8388608 and volume label "datastore2".
/vmfs/devices/disks/naa.600508e00000000018c538f794cde70f: Permission denied. (Have you set the partition type to 0xfb?)
Error: Permission denied
/dev/disks #

You might want to run it again and check /var/log/messages for any errors.

I found something about storeage.

Dec 8 17:31:13 Hostd: [2010-12-08 17:31:13.141 30DCAB90 verbose 'Cimsvc'] Ticket issued for CIMOM version 1.0, user root
Dec 8 17:31:15 Hostd: [2010-12-08 17:31:15.102 30E0BB90 verbose 'App'] CloseSession called for session id=52893549-f6e8-5d06-801c-13eeb43695b3
Dec 8 17:31:15 Hostd: [2010-12-08 17:31:15.102 30E0BB90 verbose 'App'] Looking up object with name = "haTask-ha-host-vim.host.StorageSystem.refresh-1852795364" failed.
Dec 8 17:31:15 Hostd: [2010-12-08 17:31:15.103 30E0BB90 verbose 'PropertyCollector'] GetPropertyProvider failed for haTask-ha-host-vim.host.StorageSystem.refresh-1852795364
Dec 8 17:31:15 Hostd: [2010-12-08 17:31:15.103 30E0BB90 verbose 'App'] Looking up object with name = "haTask-ha-host-vim.host.StorageSystem.refresh-1852795368" failed.
Dec 8 17:31:15 Hostd: [2010-12-08 17:31:15.103 30E0BB90 verbose 'PropertyCollector'] GetPropertyProvider failed for haTask-ha-host-vim.host.StorageSystem.refresh-1852795368
Dec 8 17:31:15 Hostd: [2010-12-08 17:31:15.103 30E0BB90 verbose 'App'] Looking up object with name = "haTask-ha-host-vim.host.StorageSystem.refresh-1852795381" failed.
Dec 8 17:31:15 Hostd: [2010-12-08 17:31:15.103 30E0BB90 verbose 'PropertyCollector'] GetPropertyProvider failed for haTask-ha-host-vim.host.StorageSystem.refresh-1852795381
Dec 8 17:31:15 Hostd: [2010-12-08 17:31:15.103 30E0BB90 verbose 'App'] Looking up object with name = "haTask-ha-host-vim.host.StorageSystem.rescanVmfs-1852795377" failed.
Dec 8 17:31:15 Hostd: [2010-12-08 17:31:15.103 30E0BB90 verbose 'PropertyCollector'] GetPropertyProvider failed for haTask-ha-host-vim.host.StorageSystem.rescanVmfs-1852795377
Dec 8 17:31:15 Hostd: [2010-12-08 17:31:15.104 30E0BB90 verbose 'App'] Looking up object with name = "haTask-ha-host-vim.host.StorageSystem.refresh-1852795382" failed.
Dec 8 17:31:15 Hostd: [2010-12-08 17:31:15.104 30E0BB90 verbose 'PropertyCollector'] GetPropertyProvider failed for haTask-ha-host-vim.host.StorageSystem.refresh-1852795382
Dec 8 17:31:15 Hostd: [2010-12-08 17:31:15.104 30E0BB90 verbose 'App'] Looking up object with name = "haTask-ha-host-vim.host.StorageSystem.refresh-1852795378" failed.
Dec 8 17:31:15 Hostd: [2010-12-08 17:31:15.104 30E0BB90 verbose 'PropertyCollector'] GetPropertyProvider failed for haTask-ha-host-vim.host.StorageSystem.refresh-1852795378
Dec 8 17:31:15 Hostd: [2010-12-08 17:31:15.104 30E0BB90 verbose 'App'] Looking up object with name = "haTask-ha-host-vim.host.StorageSystem.rescanAllHba-1852795376" failed.
Dec 8 17:31:15 Hostd: [2010-12-08 17:31:15.104 30E0BB90 verbose 'PropertyCollector'] GetPropertyProvider failed for haTask-ha-host-vim.host.StorageSystem.rescanAllHba-1852795376