Which vSAN advanced setting can be adjusted to avoid rebuild operations during a host hardware maintenance window that is expected to exceed 90 minutes?

A 5-node vSAN cluster contains multiple virtual machines, and a vSAN storage policy with the rule "Failures to tolerate" set to "1 failure - RAID-5 (Erasure Coding)" is assigned. A vSAN administrator has changed the rile in the assigned policy to "2 failures - RAID-6 (Erasure Coding)".
What is the result of this change?

What os the maximum number of 2-node clusters that can share a vSAN Shared Witness host in vSAN 7.0 U1?

What are two purposes of a vSAN storage policy (Choose two.)

An administrator is responsible for managing a 5-node vSAN 7.0 cluster that hosts 150 virtual machines. Each virtual machine belongs to one of the following vSAN Storage Policies:
vSANPolicy1:
Site Disaster Tolerance: None
Failures to Tolerate: 1 failure - RAIN5 (Erase Coding)
vSANPolicy2:
Site Disaster Tolerance: None
Failures to Tolerate: No data redundancy
Following an unplanned power event within the datacenter, the administrator has been alerted to the fact that one host has permanently failed. Prior to the vSAN host failure, the usable storage capacity of the vSAN Cluster was more than 40%.
What will be the potential impact to any virtual machine that was running on the failed host using vSANPolicy2?