1752749
Members
4963
Online
108789
Solutions
Whilst SAN changes can explain away changes in the cX part of a device special file, any changes in the tYdZ part are going to come from the disk array. Here's you're before and after:
>LUN 0 = /dev/rdsk/c13t0d0 {ocr disk}
>LUN 1 = /dev/rdsk/c12t0d1 {vote disk}
>LUN 2 = /dev/rdsk/c12t0d2 {data}
>LUN 3 = /dev/rdsk/c13t0d0 {data}
>
>They are now showing up as:
>
>LUN 0 = /dev/rdsk/c12t0d0
>LUN 1 = /dev/rdsk/c9t0d1
>LUN 2 = /dev/rdsk/c9t0d2 {data}
>LUN 3 = /dev/rdsk/c12t0d3 {data}
So normally I'd look at this and say that c9t0d1 is now your voting disk, but in this case I'm concerned, as the the tXdY component of the device special file has changed for one of the data disks. This points to changes on the Clariion rather than (or as well as) changes in the SAN.
I guess another possibility is that something here is still operating in FCAL mode... but haven't seen any of that in a while.
Do you by any chance have an ioscan output from before the change? Post that with the new ioscan output and we might be able to say more... At the very least post your new 'ioscan -f' output.
HTH
Duncan
I am an HPE Employee
>LUN 0 = /dev/rdsk/c13t0d0 {ocr disk}
>LUN 1 = /dev/rdsk/c12t0d1 {vote disk}
>LUN 2 = /dev/rdsk/c12t0d2 {data}
>LUN 3 = /dev/rdsk/c13t0d0 {data}
>
>They are now showing up as:
>
>LUN 0 = /dev/rdsk/c12t0d0
>LUN 1 = /dev/rdsk/c9t0d1
>LUN 2 = /dev/rdsk/c9t0d2 {data}
>LUN 3 = /dev/rdsk/c12t0d3 {data}
So normally I'd look at this and say that c9t0d1 is now your voting disk, but in this case I'm concerned, as the the tXdY component of the device special file has changed for one of the data disks. This points to changes on the Clariion rather than (or as well as) changes in the SAN.
I guess another possibility is that something here is still operating in FCAL mode... but haven't seen any of that in a while.
Do you by any chance have an ioscan output from before the change? Post that with the new ioscan output and we might be able to say more... At the very least post your new 'ioscan -f' output.
HTH
Duncan
I am an HPE Employee
Can you check this data your originally provided:
LUN 0 = /dev/rdsk/c13t0d0 {ocr disk}
LUN 1 = /dev/rdsk/c12t0d1 {vote disk}
LUN 2 = /dev/rdsk/c12t0d2 {data}
LUN 3 = /dev/rdsk/c13t0d0 {data}
They are now showing up as:
LUN 0 = /dev/rdsk/c12t0d0
LUN 1 = /dev/rdsk/c9t0d1
LUN 2 = /dev/rdsk/c9t0d2 {data}
LUN 3 = /dev/rdsk/c12t0d3 {data}
I note that in the old data the ocr disk and 2nd data disk are the same (c13t0d0). It's hard to give an accurate response if you don't provide accurate data. Please check again - what were the devices before, what are they now?
Duncan
I am an HPE Employee
LUN 0 = /dev/rdsk/c13t0d0 {ocr disk}
LUN 1 = /dev/rdsk/c12t0d1 {vote disk}
LUN 2 = /dev/rdsk/c12t0d2 {data}
LUN 3 = /dev/rdsk/c13t0d0 {data}
They are now showing up as:
LUN 0 = /dev/rdsk/c12t0d0
LUN 1 = /dev/rdsk/c9t0d1
LUN 2 = /dev/rdsk/c9t0d2 {data}
LUN 3 = /dev/rdsk/c12t0d3 {data}
I note that in the old data the ocr disk and 2nd data disk are the same (c13t0d0). It's hard to give an accurate response if you don't provide accurate data. Please check again - what were the devices before, what are they now?
Duncan
I am an HPE Employee
Also
Are you using PowerPath?
Whay do I only see one disk out of the 2nd HBA (1/0/2/0) whilst I see 4 out of the other (0/0/10/0)
This ioscan doesn't add up with the LUN IDs you have posted - can you post an "ioscan -fn" as well?
Thanks
Duncan
I am an HPE Employee
Are you using PowerPath?
Whay do I only see one disk out of the 2nd HBA (1/0/2/0) whilst I see 4 out of the other (0/0/10/0)
This ioscan doesn't add up with the LUN IDs you have posted - can you post an "ioscan -fn" as well?
Thanks
Duncan
I am an HPE Employee
Sure you can - just use dd:
To look at the first two 1K blocks
dd if=/dev/rdsk/c12t0d0 of=/tmp/mydisk bs=1k count=2
You can then use soemthing like xd to look at the contents of those blocks
Whether you can out anything usefull in there depends on what Oracle write into the starting blcoks of their disks.
HTH
Duncan
I am an HPE Employee
To look at the first two 1K blocks
dd if=/dev/rdsk/c12t0d0 of=/tmp/mydisk bs=1k count=2
You can then use soemthing like xd to look at the contents of those blocks
Whether you can out anything usefull in there depends on what Oracle write into the starting blcoks of their disks.
HTH
Duncan
I am an HPE Employee
