Setup Guide

4
PS Series Array Preparation — Known Limitations
and Recommendations
This section lists known limitations and recommendations associated with preparing the array for a rmware update.
Minimizing Host Disruption
The rmware update process requires updating the rmware code and restarting each array controller. To reduce the impact of the
controller restart operation on the host operating system and applications, the rmware update process occurs as a rolling controller
update. During this process, a controller failover event causes the host initiators to log out and then log back in to the volumes
connected to the SAN. If you have implemented the EqualLogic best practices for host settings and network design, this logout/
login process has minimal eect on host volumes. The update process does not impact data integrity or result in any data loss.
For more information about minimizing host disruption, see Dell EqualLogic PS Series Storage Arrays iSCSI Initiator and Operating
System Considerations: Optimizing Your SAN Environment for High Availability on the support website, eqlsupport.dell.com.
Supported Update Paths
When updating array rmware, you must follow the supported update path, as shown in Table 4. Supported PS Series Firmware
Update Paths. The rst column lists starting rmware versions, and the second column lists the versions to which they can be
updated.
NOTE: Dell Storage Update Manager can be used when updating rmware from the following versions:
• PS Series Storage Arrays rmware version 6.0 and later
• FS Series Storage Appliances rmware version 3.0 and later
The notation used in the table refers to all releases of a given rmware revision. For example, 9.1.x refers to versions 9.1.1, 9.1.2, and so
on, as well as all version 9.1 patch releases.
Table 4. Supported PS Series Firmware Update Paths
Starting Versions Supported Update Versions
10.0.x
• Later 10.0.x releases
9.1.x
• Later 9.1.x releases
• 10.0.x releases
9.0.x
• Later 9.0.x releases
• 9.1.x releases
8.1.x
• Later 8.1.x releases
• 9.0.7 or later; cross-platform replication requires v9.0.9 or later
8.0.x
• Later 8.0.x releases
• 8.1.x releases
12
PS Series Array Preparation — Known Limitations and Recommendations