On Thursday February 14, babydr@baby-dragons.com wrote:
>
> Hello All , That subject reminded me that I have seen some notes
> in the 0.5 TODO file that say DONE & seem to be related to a
> config file for mdctl . The only example of a config file I found
> was in 0.4.2 and is two lines long . And did not show any of the
> related items from the 0.5 TODO file of course . What I have
> below is from the config.c file . Is there further document(s)
> or examples that describe the config file in further detail ?
> Tia , JimL
I guess I should improve the doco and do another release...
>
>
> 1 ) Keywords are :
> DEVICE
> ARRAY
Yep.
>
> 2 ) DEVice has two styles
> DEV /dev/sda* /dev/hd*
> DEV /dev/sd[b-f]*
these are both the same style. You just list all devices that should
scanned, and you can use "glob"-style wild cards (aka shell filename
expansion style).
>
> 3 ) ARRay Must contain a /dev/md* & May contain these options .
> ARR /dev/md0 [uuid=whatever] [name=something]
name=something doesn't work (yet) as superblocks do not contain a
name.
The ways to identify a devices are:
uuid=whatever
super-minor=number
devices=/dev/hda1,/dev/hdb1
The first will assemble from any devices that were found with a RAID
superblock with the given uuid. UUID can be found with "mdctl --examine"
The second will select superblocks based on minor number. If you
create an array as /dev/md3, then the minor number in the superblock
will be 3.
The third will use the listed devices. This is not reliably for scsi
as device names can change, but it is ok for ide.
NeilBrown
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