Re: Raid array name by mdadm

[Anugraha Sinha <asinha.mailinglist@gmail.com>]

Hi Sheng,

On 10/29/2015 7:01 AM, Sheng Yang wrote:
> On Wed, Oct 28, 2015 at 2:40 PM, Sheng Yang <sheng@yasker.org> wrote:
>> On Wed, Oct 28, 2015 at 12:56 PM, Dragan Milivojević
>> <galileo@pkm-inc.com> wrote:
>>> mdadm --create /dev/md/device-123 --verbose --level=mirror
>>> --raid-devices=2 /dev/loop0 /dev/loop1
>>>
>>> [root@eos ~]# ll /dev/md/device-123
>>> lrwxrwxrwx 1 root root 8 Oct 28 20:53 /dev/md/device-123 -> ../md127
>>>
>>> [root@eos ~]# mdadm --detail --scan
>>> ARRAY /dev/md/device-123 metadata=1.2 name=device-123
>>> UUID=03ba5df7:7c5cc933:367e19ef:384665c5
>>
>> Thank Dragan! It works!
>>
>> Seems it's mdadm itself create the link rather than do through kernel,
>> which gave me a little trouble. :D
>
> Hi Dragan,
>
> One more question if you don't mind:
>
> When you do
>
> mdadm --stop /dev/md/device-123
>
> Would mdadm remove the broken link file /dev/md/device-123 automatically?
>
> I found I have to remove the link file manually later...
>

You stopped the array. You might want to assemble it once again saying
mdadm --assemble /dev/md/device-123 /dev/loop0 /dev/loop1
Then, it would just create a new /dev/md*number* and create the link 
with /dev/md/device-123.

This is my logical thought, havent looked at the mdadm code though to 
confirm this.

Regards
Anugraha
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