March 7, 20251 yr Hi, I recently swapped a harddrive that died with a new drive. The contents were emulated and a disk rebuild was done. The drive was showing as unmountable and asking for a format. I was advised to not format under any circumstances, and let the rebuild complete. The rebuild is complete but Disk 3 (the new disk) is still unmountable. I did the check file system and got the following: Phase 1 - find and verify superblock... Phase 2 - using internal log - zero log... - scan filesystem freespace and inode maps... - found root inode chunk Phase 3 - for each AG... - scan (but don't clear) agi unlinked lists... - process known inodes and perform inode discovery... - agno = 0 - agno = 1 - agno = 2 - agno = 3 - agno = 4 - agno = 5 - agno = 6 - agno = 7 - process newly discovered inodes... Phase 4 - check for duplicate blocks... - setting up duplicate extent list... - check for inodes claiming duplicate blocks... - agno = 0 - agno = 1 - agno = 4 - agno = 3 - agno = 5 - agno = 6 - agno = 2 - agno = 7 No modify flag set, skipping phase 5 Phase 6 - check inode connectivity... - traversing filesystem ... - traversal finished ... - moving disconnected inodes to lost+found ... Phase 7 - verify link counts... Maximum metadata LSN (1:463638) is ahead of log (1:2). Would format log to cycle 4. No modify flag set, skipping filesystem flush and exiting. The documentation say if I am not sure what this means, I should ask before doing a fix. Am I safe to click Fix? Thank you, and sorry if I am being overly cautious on this!
March 7, 20251 yr Community Expert Solution a rebuild never clears the unmountable status. If that was the status of the emulated drive then it will also be the status of the rebuilt drive. Normally we recommend doing the check filesystem before the rebuild. So yes you need to do the fix. After doing that it should mount when the array is restarted in Normal mode.
March 7, 20251 yr Author Thank you, appreciate it. I will do the fix and see how I go. I thought I had done things in an odd order! Learned for next time though.
March 7, 20251 yr Community Expert 17 minutes ago, serhan said: I thought I had done things in an odd order! Learned for next time though If the old drive really died then the order was probably not important. The reason for starting with trying to repair the emulated disk first is that if that does not work well then the old disk is often usable for data recovery purposes.
March 7, 20251 yr Author I believe we are all up and running now, looks like smooth sailing. Thanks for the help. This community is always great.
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