Friends i am sharing here Some last min issues for EMC SAN admin which comes to us as surprise while working on multiple EMC devices like VMAX, VPLEX, RPA, Unified VNX and others. Most of these has come to us in the very last min and we were forced to cancel/reschedule the work due to this.
1. VMAX DIMM replacement which as per EMC statement an online activity is not actually online (non-disruptive) work. FA port will go offline during the replacement.
2: VPLEX upgrade is online activity only when many specified conditions are met during the pre-checks. These pre-check require making changes on the servers as well. So basically one upgrade need multiple hours of work to make it non-disruptive. On funny note – Multiple downtime is required to avoid downtime during upgrade.
3: RPA upgrade – EMC has 2 kind of RPA product one for which EMC will perform the upgrade other is customer up-gradable which means EMC will charge for it if they are asked to do the upgrade.
4: Unified VNX file upgrade is not a online upgrade if you have NFS shares configured and client is using these shares on the application. During the DM failover the application will be impacted and it will go down causing application issue and obviously financial losses.
5: VPLEX support matrix is very selectinve and as the same time very comprehensive. This results in problem after after the migration of server to VPLEX. most of the time when you open case with vendor you will end up finding that you are not on the supported configuration or settings. So it is always better to do hard work before the migration rather than beating your head with support later.
6: SRDF related issue are really troublesome and you expect same generic kind of response from support when contacted and its troubleshooting covers very area which is approx everything in the environment.
Please add if you too have these kind of information related EMC, HP, IBM, HDS or Netapp products.