raidtab -> mdadm conf file?

raidtab -> mdadm conf file?

[Robert L. Harris]

[-- Attachment #1: Type: text/plain, Size: 805 bytes --]



  I currently have about 30 machines using raidtools and /etc/raidtab.  
Does anyone have a script that will generate a complete mdadm conf
file based on a raidtab or output from mdadm --detail?  While mdadm may
not need need the conf file once it's built etc I like to keep them
around in the event we have to rebuild an array that's destroyed (2+
disks out of a RAID5 Array)) to an identicle, standard format.

Robert


:wq!
---------------------------------------------------------------------------
Robert L. Harris                     | PGP Key ID: E344DA3B
                                         @ x-hkp://pgp.mit.edu 
DISCLAIMER:
      These are MY OPINIONS ALONE.  I speak for no-one else.
FYI:
 perl -e 'print $i=pack(c5,(41*2),sqrt(7056),(unpack(c,H)-2),oct(115),10);'


[-- Attachment #2: Type: application/pgp-signature, Size: 189 bytes --]

Re: raidtab -> mdadm conf file?

[Derek Vadala]

On Wed, 19 Feb 2003, Robert L. Harris wrote:

>   I currently have about 30 machines using raidtools and /etc/raidtab.
> Does anyone have a script that will generate a complete mdadm conf
> file based on a raidtab or output from mdadm --detail?  While mdadm may

Assuming the arrays are operational you could do something like:


# echo "DEVICES /dev/sd*" > /etc/mdadm.conf
# mdadm --detail --scan >> /etc/mdadm.conf

Just adjust the first command so that it has the desired device set.

--
Derek Vadala, derek@cynicism.com, http://www.cynicism.com/~derek

Re: raidtab -> mdadm conf file?

[Robert L. Harris]

[-- Attachment #1: Type: text/plain, Size: 1170 bytes --]



What should the output of "mdadm --detail --scan" look like?

root@disk2:~# mdadm --detail --scan
mdadm: option s not valid in mode D


Thus spake Derek Vadala (derek@cynicism.com):

> On Wed, 19 Feb 2003, Robert L. Harris wrote:
> 
> >   I currently have about 30 machines using raidtools and /etc/raidtab.
> > Does anyone have a script that will generate a complete mdadm conf
> > file based on a raidtab or output from mdadm --detail?  While mdadm may
> 
> Assuming the arrays are operational you could do something like:
> 
> 
> # echo "DEVICES /dev/sd*" > /etc/mdadm.conf
> # mdadm --detail --scan >> /etc/mdadm.conf
> 
> Just adjust the first command so that it has the desired device set.
> 
> --
> Derek Vadala, derek@cynicism.com, http://www.cynicism.com/~derek

:wq!
---------------------------------------------------------------------------
Robert L. Harris                     | PGP Key ID: E344DA3B
                                         @ x-hkp://pgp.mit.edu 
DISCLAIMER:
      These are MY OPINIONS ALONE.  I speak for no-one else.
FYI:
 perl -e 'print $i=pack(c5,(41*2),sqrt(7056),(unpack(c,H)-2),oct(115),10);'


[-- Attachment #2: Type: application/pgp-signature, Size: 189 bytes --]

Re: raidtab -> mdadm conf file?

[Derek Vadala]

On Wed, 19 Feb 2003, Robert L. Harris wrote:

> What should the output of "mdadm --detail --scan" look like?
>
> root@disk2:~# mdadm --detail --scan
> mdadm: option s not valid in mode D
>

A series of array entries like such (one for each array that's running):

ARRAY /dev/md0 level=raid1 num-devices=2 UUID=8b9bafc6:ed98bbd6:83d1c10f:d388a65f
ARRAY /dev/md6 level=raid1 num-devices=2 UUID=98079ef1:26a71e58:a91327d9:ada25de7
etc....

Which version of mdadm are you working with?

--
Derek Vadala, derek@cynicism.com, http://www.cynicism.com/~derek