This is something that cannot be changed (to a lower value), here's why: When a replica is created for the first time, it has to create all the blocks of data at the destination site (100% of the volume), the additional 5% is used for overhead (internal to the array).  Setting this to a lower value would result in a replica with data missing, so a lower value is not a good thing when you need to restore your data from the replica.  Regarding updating the FW, as you noted you are moving one array to another pool for FW updates, in order to utilize the “no down time” option, however, with free space an issue in your current pool, the only way around this is to add space, delete snapshots, move volumes to another pool, etc. You could however explore the idea of doing in place firmware updates, provided you have set all hosts, and VMs to the proper iSCSI disk timeouts and additional settings as listed in the “iSCSI Initiator and Operating System Considerations” guide (on the firmware download page).  Of course this would require doing FW updates during times of low IO, and possibility having to shut down any non-essential VM’s or hosts to limit the impact to your high available systems. -joe
Hi, I was wondering where I can request a change in the Group Manager software.  The thing I would like to request is to change the minimum value (currently 105%) for the replication setting, Total replica reserve percent.  The reason for this request is that I have two smaller SAN arrays and one large SAN array and so when I upgrade the firmware, I need to release as much space (such as deleting all snapshots and replicas) to have enough storage space for when I upgrade the large SAN array.  I am almost to the maximum space that the two SAN arrays can hold because I need to have 105% for the replica reserve (which is totaling about 3 TB at 105%).   Is there a way to set the replica reserve under 105%? Thank you.
Group Manager Software - Change Request