Backup!!!!!!!!
Von meinem iPhone gesendet
> Am 23.11.2020 um 17:10 schrieb centos@xxxxxxx:
>
> On 23/11/2020 16:49, Frank Bures wrote:
>> On 11/23/20 10:46 AM, Simon Matter wrote:
>>>> Hi,
>>>>
>>>> I want to replace my hard drives based SW RAID-1 with SSD's.
>>>>
>>>> What would be the recommended procedure? Can I just remove one drive,
>>>> replace with SSD and rebuild, then repeat with the other drive?
>>>
>>> I suggest to "mdadm --fail" one drive, then "mdadm --remove" it. After
>>> replacing the drive you can "mdadm --add" it.
>>>
>>> If you boot from the drives you also have to care for the boot loader. I
>>> guess this depends on how exactly the system is configured.
>>
> If you can the new disks while the original 2 disks are still available then grow, add, wait, fail, remove, shrink. That way you will never loose redundancy...
>
> # grow and add new disk
>
> mdadm --grow -n 3 /dev/mdX -a /dev/...
>
> # wait for rebuild of the array
>
> mdadm --wait /dev/mdX
>
> # fail old disk
>
> mdadm --fail /dev/sdY
>
> # remove old disk
>
> mdadm /dev/mdX --remove /dev/sdY
>
> # add second disk
>
> mdadm /dev/mdX --add /dev/...
>
> # wait
>
> mdadm --wait /dev/mdX
>
> # fail and remove old disk
>
> mdadm --fail /dev/sdZ
>
> mdadm /dev/mdX --remove /dev/sdZ
>
> # shrink
>
> mdadm --grow -n 2 /dev/mdX
>
>
>
>
> peter
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