Describe the issue: The Ceph 4.x documentation section titled "4.8. Deploying OSDs with different hardware on the same host" has incorrect syntax and a typo. Describe the task you were trying to accomplish: Configuring an SSD tier and an HDD tier on a single Ceph cluster using ceph-ansible Suggestions for improvement: The documentation has this stanza which has erroneous formatting and a typo that will cause a failure: create_crush_tree: true crush_rule_config: true crush_rules: name: HDD root: default type: host class: hdd default: true name: SDD root: default type: host class: sdd default: true This is the correct formatting of the "crush_rules" section and using a valid device class (s/sdd/ssd/): create_crush_tree: true crush_rule_config: true crush_rules: - name: HDD root: default type: host class: hdd default: true - name: SDD root: default type: host class: ssd default: true Document URL: https://access.redhat.com/documentation/en-us/red_hat_ceph_storage/4/html-single/installation_guide/index#deploying-osds-with-different-hardware-on-the-same-host_install Chapter/Section Number and Title: 4.8. Deploying OSDs with different hardware on the same host Product Version: Ceph 4.x Environment Details: Environments with two tiers of disks. Any other versions of this document that also needs this update: Probably all of the Ceph 4 versions. Additional information: none
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