[LUDOC-240] Include additional steps in "14.8.5. Restoring OST Configuration Files" for adding reformatted OST

• Type: Improvement
• Resolution: Unresolved
• Priority: Major
• Assignee: Lustre Manual Triage
• Reporter: Karl Merritts (Inactive)

Description

Recently there was a need to reformat a deactivated OST(on the MGS) and then bring it back into service. Instead of using writeconf, the procedure in the most recent manual was followed:
http://build.whamcloud.com/job/lustre-manual/lastSuccessfulBuild/artifact/lustre_manual.xhtml#section_kzs_pgt_tl

a few additional steps were needed:

After initially following the ops guide instructions for taking mountdata from another OST, which lead to OST mount failure since the mountdata file was left in a bad state, we revised the procedure as follows:

1. took mountdata from another OST, used xxd to generate ascii version, updated two OST references in the file (one index reference, the other the name string); copied the revised mountdata file to /CONFIGS on the newly formatted OST.

2. mounted the OST, ensured that it started ok

3. unmounted the OST, used xxd to update /O/0/LAST_ID (created by the previous mount) to match current MDT lov_objid value for this OST
mounted OST again

4. reactivated OST

I'll clean up the recommendation changes when I get a chance.