2005 Failover Cluster SAN drives best practices

> What is the best practice to move the logs onto
> another spindle? Do I have to just create another LUN?
You should at least put yout transaction log files on a separate LUN from
your data LUN. This doesn't guarantee that your data and log would be placed
on separate spindles inside SAN because both LUNs can be carved from the sam
e
set of disks, but at least it gives you some separation.

> I am about to add a few more instances.
> Does each one need to have it's own LUN?
Each clustered instance will be implemented a separate cluster resource
group with its own disk resource(s). Since you can't have the same read/writ
e
disk as two separate disk resources in different resource groups, each
clustered instance needs its own LUN.

> There is a limited amount of drive letters that I can create. Is there
> a way to share a LUN between instances?
You can't really share drive letters. But SQL2005 fully supports mounted
volumes in a cluster. These volumes don't have to be assigned separate drive
letters. As long as they are made disk resources, and are mounted under a
root drive letter, you can have multiple volumes in a resource group (or an
instance) with as few as one drive letter per instance.
Linchi
"Karl" wrote:

> I have a MS SQL 2005 default installation on a Windows 2003 cluster. I
> currently have two nodes and I am planning on adding more instances to
> run on the other node.
> First, I am not sure I have setup my existing default instance the best
> way for my cluster. I currently only have one 'Physical Disk' in the
> cluster group which is a LUN on our SAN. Both the data files and log
> files are stored there. What is the best practice to move the logs onto
> another spindle? Do I have to just create another LUN?
> I am about to add a few more instances. Does each one need to have it's
> own LUN?
> There is a limited amount of drive letters that I can create. Is there
> a way to share a LUN between instances? I seem to remember reading a
> feature of 2005 that was related to this but, for the life of me, I
> cannot find it again.
> Any help would be appreciated!
> Thank you
> Karl
>I have a MS SQL 2005 default installation on a Windows 2003 cluster. I
currently have two nodes and I am planning on adding more instances to
run on the other node.
First, I am not sure I have setup my existing default instance the best
way for my cluster. I currently only have one 'Physical Disk' in the
cluster group which is a LUN on our SAN. Both the data files and log
files are stored there. What is the best practice to move the logs onto
another spindle? Do I have to just create another LUN?
I am about to add a few more instances. Does each one need to have it's
own LUN?
There is a limited amount of drive letters that I can create. Is there
a way to share a LUN between instances? I seem to remember reading a
feature of 2005 that was related to this but, for the life of me, I
cannot find it again.
Any help would be appreciated!
Thank you
Karl|||> What is the best practice to move the logs onto
> another spindle? Do I have to just create another LUN?
You should at least put yout transaction log files on a separate LUN from
your data LUN. This doesn't guarantee that your data and log would be placed
on separate spindles inside SAN because both LUNs can be carved from the sam
e
set of disks, but at least it gives you some separation.

> I am about to add a few more instances.
> Does each one need to have it's own LUN?
Each clustered instance will be implemented a separate cluster resource
group with its own disk resource(s). Since you can't have the same read/writ
e
disk as two separate disk resources in different resource groups, each
clustered instance needs its own LUN.

> There is a limited amount of drive letters that I can create. Is there
> a way to share a LUN between instances?
You can't really share drive letters. But SQL2005 fully supports mounted
volumes in a cluster. These volumes don't have to be assigned separate drive
letters. As long as they are made disk resources, and are mounted under a
root drive letter, you can have multiple volumes in a resource group (or an
instance) with as few as one drive letter per instance.
Linchi
"Karl" wrote:

> I have a MS SQL 2005 default installation on a Windows 2003 cluster. I
> currently have two nodes and I am planning on adding more instances to
> run on the other node.
> First, I am not sure I have setup my existing default instance the best
> way for my cluster. I currently only have one 'Physical Disk' in the
> cluster group which is a LUN on our SAN. Both the data files and log
> files are stored there. What is the best practice to move the logs onto
> another spindle? Do I have to just create another LUN?
> I am about to add a few more instances. Does each one need to have it's
> own LUN?
> There is a limited amount of drive letters that I can create. Is there
> a way to share a LUN between instances? I seem to remember reading a
> feature of 2005 that was related to this but, for the life of me, I
> cannot find it again.
> Any help would be appreciated!
> Thank you
> Karl
>