Which two storage policy changes require a full rebuild of all components for an object? (Choose two.)
Which two storage policy changes require a full rebuild of all components for an object? (Choose two.)
Changing the storage policy of an object can necessitate a full rebuild of its components. Reducing the Primary Failures to Tolerate from 2 to 1 for an object using RAID-1 (Mirroring) modifies the redundancy and fault tolerance configuration, requiring a restructuring of data to align with the new policy. Additionally, changing the failure tolerance method from RAID-1 (Mirroring) to RAID-5 (Erasure Coding) significantly alters the data layout and protection mechanism, necessitating a full rebuild of the object components to comply with RAID-5's erasure coding requirements.
I think A and E are correct. https://cormachogan.com/2018/02/21/policy-changes-can-trigger-rebuild-vsan/?amp=1
Agree i think A&E are correct
A and E. Disabling checksum does not only Enabling does. Changing FTM does. https://cormachogan.com/2018/02/21/policy-changes-can-trigger-rebuild-vsan/
C and E for me ...Reduce the Primary Failures to Tolerate from 2 to 1 means from 5 hosts we now have 3 hosts formula 2n+1 and hence total rebuild is required. As for E no need explain since all agree on....in Summary the FT method and tolerance level are two primary causes of SP rebuild
adding more info ..here vmware comments Because the managed storage policy varies based on cluster size, adding or removing hosts will trigger a storage policy reconfiguration if it changes the size of the cluster so that it requires a different policy. For example, if you add an additional host to a cluster containing five hosts, the storage policy for that cluster is reconfigured from using 1 failure - RAID-1 (Mirroring) to 2 failures - RAID-6 (Erasure Coding). The reverse happens if the extra host is removed and the number of hosts is reduced from six to five. https://docs.vmware.com/en/VMware-Cloud-on-AWS/services/com.vmware.vsphere.vmc-aws-manage-data-center-vms.doc/GUID-EDBB551B-51B0-421B-9C44-6ECB66ED660B.html
C-E are correct increase disk stripe needs resync data, not rebuild
A-E are correct