> Is there a limit how many md devices I can create?
Yes :-((
> My /dev contains md0 to md15. I'd like to leave some gaps between each
> device to be able to insert another later (to steer the resync order).
Do you know something I don't ?
Are you saying that the re-sync order is based on the /dev/md<N> number,
rather than the order it happens to find them on disk when auto-detecting ?
The reason I want lots is that for external SCSI disks in a JBoD, any SCSI
chain can be moved between servers (e.g. if one server blows up).
As such, I make the internal IDE md<N> numbers be small [ but not single
digit, as there is a bug in mkraid etc such that it does a simple grep in
/proc/mdstat to see if it is `active' -- md2 falsely `matches' with md27,
so it refuses to mkraid md2 as it is already busy :-( ] and local, whereas all
the external md<N>s are globally unique. Kinds of burns up the address space!
> Is that possible?
Yes.
> I created md255 (with mknod) and made a metadevice.
Yup -- as I remember, that's the last one :-(
> It worked, but will there be future problems?
/proc/partitions isn't very pleasant :-(
baldock:~: grep md /proc/partitions | cat -v
9 6 1052160 md6
9 145 2104384 mdM-A
9 147 2104384 mdM-C
9 149 2104384 mdM-E
9 151 2104384 mdM-G
9 153 2104384 mdM-I
9 154 2104384 mdM-J
baldock:~:
