need help to Mount a SAN LUN ....

[MrVmware9423]

Dear team,

today suddenly we have found two san luns are not mounted on one of the vcb server, but we are able to see the same on a disk managment window, following is the screenshot, need your help how to re-mount these exisiting luns without loosing the data.

the luns which are not initialized these r those luns which i need to mount as Q and O drive , and following are events logs

need urgent help

regards

Mr Vmware

[kastlr]

Hi,

which Windows OS Version is used?

As per Event IDs 257, 12, and 51 are logged on a Windows Server 2003-based computer such messages could be safely ignored.

You should check the current status of these disks on the windows server with the following command sequence.

• open cmd Shell and run diskpart
  
• list disk to verify the used disk numbers (in your case 2-5)
  
• select disk X to select one of the disks
  
• attribute disk to verify the current state of that disk (focus on Read-Only)
  

Based on the results of these steps additional tasks might be needed.

Regards,

Ralf

[MrVmware9423]

win2003 sp2

and following is the outout of the diskpart command 

please help me what to do further....

regards

Mr VMware

[MrVmware9423]

Dear VMware Experts need your asisstance on the same.

need urgent help friends........... waiting for the earliest reply.....

regards

Mr VMware

[kastlr]

Hi,

you should update the diskpart Software as your current version does only offer limited functionality.

An updated version of the Disk Partition tool for Windows Server 2003 is available

Regards,

Ralf

[MrVmware9423]

once i tried to inmstall the hotfix , i m getting error that it's alredy installed.....

pleas help me with the steps to mount a san lun without loosing data , last night these luns were automatically unmounts from this server

regards

Mr Vmware

[krishna_v78]

is it a VM or Phy. Machine?

Physical Machine - As per the event logs, I can see it is IBM SAN. Use below SDD commands to view the Multipathing.

Navigate to IBM Multipathing s/w C:\program files\IBM\(don't remember folder name)

commands:

datapath query adapter

datapath query device

Virtual Machine - check the LUN status  in vCenter

[MrVmware9423]

it's a physical Server, and that lun is only mapped to that physical server,

regards

Mr Vmware

[krishna_v78 · Accepted solution]

First look at the LUN status from SAN side.

From windows machine

1. make sure that you can see wwpns in HBA bios.

2. From OS level check the LUN status using above mentioned commands if Multipathing s/w is installed, Else look for hard disks in Device Manger (it should be something lik IBM DISK)

3. Some times, simple reboot can re-mount LUNs