Re: recovering failed and unrecognizable RAID5 during mdadm --grow without backup

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On 5/13/2016 5:11 PM, Phil Turmel wrote:
On 05/13/2016 10:04 AM, Phil Turmel wrote:
On 05/12/2016 05:37 PM, Claudiu Rad wrote:

how can i safely stop this reshape and assuming my / partition inside
the array is sane enough restart the actual server normally after
fsck-ing all volumes?
Well, your root is inside the array.  So you won't be able to boot
without the array assembling in the initramfs, which needs manual
intervention to supply the backup file.
Actually, if it still isn't too far into the reshape, you could use
--revert-reshape.  Then it'll reshape back to the original chunk size
what it has done so far.  That might be quicker than finishing the
reshape.  Then you could reboot into your normal OS.

this is interesting.

1. i can't find any documentation anywhere about the --revert-reshape option. how should the command look like? is it available in v3.3.2?

2. is it safe?

--
jazzman

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