[LU-14597] Allow multiple preferred mirrors in a FLR file

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.15.0
• Labels: bjhpflr
• Severity: 3
• Assignee: Zhenyu Xu
• Reporter: Zhenyu Xu

Description

Users can set prefer on any mirror/component, so the IO should not report error if multiple mirrors are set preferred, as users can have multiple sets of fast storages to use.