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SCCM installing a particular patch on one server but not on another

Dear Experts,
 We use SCCM 2012 in our environment for patching windows servers.
We found that a security patch called ‘KB2977320’ (security update for SQL 2008 R2) was installed on our SQL Disaster recovery servers.  But same patch not installed on our production SQL cluster nodes. Is there any reason why SCCM chose to selectively install a patch on set of servers but not others? We want to avoid this in future patching. Kindly advice.
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jramprakash
Asked:
jramprakash
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1 Solution
 
Nagendra Pratap SinghCommented:
are they in the same collection? is the service pack same?
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Nagendra Pratap SinghCommented:
This patch is for SP2.
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jramprakashAuthor Commented:
Hi Nagendra,
DR machines were in the same collection. I created separate device collection for each production node of the cluster. I push patches onto the passive node first (node B), reboot and check if everything is okay. After doing the manual failover of cluster resources to (node B) then patch node A. This way, I only patch passive nodes.

DR01
OS    : Windows 2008 R2 , service pack 1
SQL   : SQL server 2008 R2 SP2

DR02
OS    : Windows 2008 R2,
SQL   : SQL server 2008 R2 SP2

Node A and B  of SQL clusters
OS    : Windows 2008 R2 , service pack 1
SQL   : SQL server 2008 R2 SP2
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