Release Notes

29 Dell PS Series: Space Borrowing for Snapshots and Replicas | TR1084 | version 2
Writing 60 GB of data to the volume and creating replica changes the current replica volume reserve to 70 GB (60 GB of
data + 10 GB of current replica volume reserve = 70 GB).
Total replica reserve is a percentage of current replica volume reserve. As the total replica reserve is 105%, and the
current replica volume reserve is 70 GB, 105% of 70 GB results approximately in a 74 GB Total Replica Reserve. 100% of
the 70 GB (70 GB) are in use in the current replica volume reserve, and an additional 5% of the 70 GB (approximately 4
GB) is available for additional replicas in the total replica reserve.
This means that 74 GB are reserved for replicas of the volume on the secondary group, and 70 GB of those 74 GB are
already in use by replicas of the volume. That leaves 4 GB of reserve space for the in-progress/paused replica. The
current replication attempt of 10 GB is larger than 4 GB, and does not fit in the replica reserve.
Even though there is plenty of delegated space and borrowable space on the secondary group, the replication paused
because active/in-progress replicas are not eligible to borrow space, and the amount of changes in the replication
attempt exceeded the available space in the total replica reserve. If there is insufficient replica reserve on the
secondary group, the system will require manual administrative intervention to increase the amount of total replica
reserve space to complete the replication.