Mike,

Confirm from Navisphere Manager how many paths you have got logged in and connected for this particular server. Remember that without PP you can only have one single path to a LUN¿
Also use Diskpart to check and if necessary to modify the readonly, hidden and nodefaultdriveletter volume attributes as per below example:

C:\diskpart

DISKPART>list

DISKPART>list disk

DISKPART> select disk 4

DISKPART> detail disk

PowerDevice by PowerPath
Disk ID: 9F0B09CD
Type : FIBRE
Bus : 0
Target : 1
LUN ID : 3

Volume ### Ltr Label Fs Type Size Status Info
---------- --- ----------- ----- ---------- ------- --------- --------
Volume 5 M SQL 2005 MD NTFS Partition 10 GB Healthy

Verify the Disk ID is set correctly. Note the Volume number as well and use it in the next command:

DISKPART> list volume

DISKPART> select volume 5

DISKPART> list partition

DISKPART> select partition 1

DISKPART> detail partition

DISKPART> detail volume

Disk ### Status Size Free Dyn Gpt
-------- ---------- ------- ------- --- ---
* Disk 4 Online 10 GB 0 B

Readonly : No
Hidden : No
No Default Drive Letter: No
Shadow Copy : No

If any of the ReadOnly, Hidden, or No Default Drive Letter are set to yes, clear them with the follow command:

DISKPART> att vol clear readonly hidden nodefaultdriveletter

Volume attributes cleared successfully.

DISKPART>exit

I hope this helps
Carl

I hope you aren't using that 300GB disk for anything important. With only a single path available to you there are lots of things that could cause a SAN outage for this host!

calle,

I will give this a shot thanks.

Mike

Kelleg,

This worked thanks!

Mike