[ceph-users] cephfs-data-scan with multiple data pools

Dear All, I'm trying to recover failed MDS metadata by following the link below but having troubles. Thanks in advance. Question1: how to scan 2 data pools with scan_extents (cmd 1). The cmd didn't work with two pools specified. Should I scan one then the other? Question2: As to scan_inodes (cmd 2), should I only specify the first data pool per the document. I'm concerned if the 2nd pool is not scanned then that'll cause metadata loss. *my fs name: cephfs, data pools: cephfs_hdd, cephfs_ssd* cmd 1: cephfs-data-scan scan_extents --filesystem cephfs cephfs_hdd cephfs_ssd cmd 2: cephfs-data-scan scan_inodes --filesystem cephfs cephfs_hdd cephfs-data-scan scan_extents [<data pool> [<extra data pool> ...]]cephfs-data-scan scan_inodes [<data pool>]cephfs-data-scan scan_links Note, the data pool parameters for ‘scan_extents’, ‘scan_inodes’ and ‘cleanup’ commands are optional, and usually the tool will be able to detect the pools automatically. Still you may override this. The ‘scan_extents’ command needs all data pools to be specified,* while ‘scan_inodes’ and ‘cleanup’ commands need only the main data pool.* *https://docs.ceph.com/en/latest/cephfs/disaster-recovery-experts/ <https://docs.ceph.com/en/latest/cephfs/disaster-recovery-experts/>* -- Best Regards, *Justin Li* IT Support/Systems Administrator *Justin.Li2030(a)Gmail.com &lt;Justin.Li2030(a)Gmail.com&gt;* <http://www.linkedin.com/in/justinli7>