[CentOS] create raid /dev/md2

Toby Bluhm tkb at midwestinstruments.com
Fri Apr 18 16:35:16 UTC 2008


S.Tindall wrote:
>> David Hlácik" wrote on Friday, April 18, 2008 11:40 AM:
>>> Hi , currently i have 2 raid devices /dev/md0 and /dev/md1 , i have 
>>> added 2
>>> new disks, fdisked , created 2 primary partitions with type fd 
>>> (linux raid autodetect)
>>> Now i want to create raid from them
>>>
>>> root at vmhost1 ~]# mdadm --create --verbose /dev/md2 --level=1 /dev/sdc1
>>> /dev/sdd1
>>> mdadm: error opening /dev/md2: No such file or directory
>>>
>>> will return that error, what shouldi do?
>>
>> Not familiar with that error, but try specifying the number of devices:
>>
>> # mdadm -C /dev/md2 -l1 -n2 /dev/sd[cd]1
>>
>> Steve Tindall
>
> Forgot to ask, does /dev/md2 exists in /dev?
>
> If not, you can still use makedev to generate it:
>
> # cd /dev
> # MAKEDEV md
>
> Undocumented, but it still works.
>

man mdadm

-a, --auto{=no,yes,md,mdp,part,p}{NN}

  Instruct mdadm to create the device file if needed, possibly 
allocating an unused minor number . . . . .


-- 
Toby Bluhm
Alltech Medical Systems America, Inc.
30825 Aurora Road Suite 100
Solon Ohio 44139
440-424-2240





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