From: Rick Stevens
On 04/20/2016 09:32 AM, Weiner, Michael wrote:
> From: Gordon Messmer
>
>> On 04/20/2016 05:33 AM, Weiner, Michael wrote:
>>> I had the opportunity to add another PERC H810 controller along with a
PowerVault MD1200 to add more space ... when the server came up and I tried to mount it, I
received the following error:
>>>
>>> mount: wrong fs type, bad option, bad superblock on /dev/sdb1,
>
>> Are you sure /dev/sdb is your old array? Can you remove the new
>> controller and troubleshoot the system without it? You might be better off
resolving the problem first, and then making changes.
>
> Yes, I am sure, as the NEW array wasn’t configured at any more but
> being out of the data center makes the removal problematic
> unfortunately
I think the concept here is that you ADDED a controller to the system.
This can cause the system to enumerate the bus differently so your old, existing array
may now be /dev/sda or /dev/sdc. This will happen regardless of
whether the new array was initialized or not--it's the order in which the bus was
scanned for controllers.
Understood, I certainly wasn’t questioning the wisdom of the question or reasoning, it
makes logical sense, unfortunately I am unable to remove the new controller at this point.
I will have to schedule an outage
This is also a very good reason to use labels or UUIDs to identify
devices in your /etc/fstab rather than the /dev name as changing the hardware around is
almost guaranteed to change the /dev names and cause you untold grief.
Good point.
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