Unable to set disk autofailover timing < 5 seconds

Steps:

• 9 node cluster
• Set diskauto-failover time period=1

  $ curl -X POST -u Administrator:password 172.23.108.224:8091/settings/autoFailover -d enabled=true -d timeout=1 -d maxCount=4 -d 'failoverOnDataDiskIssues[enabled]=true' -d 'failoverOnDataDiskIssues[timePeriod]=1'

  {"errors":{"_":"failoverOnDataDiskIssues[enabled] is true. A value must be supplied for failoverOnDataDiskIssues[timePeriod]","failoverOnDataDiskIssues[timePeriod]":"The value must be in range from 5 to 3600"}}

Observation:

REST request fails with error '"failoverOnDataDiskIssues[timePeriod]":"The value must be in range from 5 to 3600"'