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Date: Tue, 30 Nov 2010 20:15:32 +0100
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Subject: Splitting hw raid mirror.
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Hi,

Im running FreeBSD 8.0-RELEASE
(FreeBSD hostname 8.0-RELEASE FreeBSD 8.0-RELEASE #1: Tue Dec  1 =
16:10:08 CET 2009
peter@hostname:/usr/obj/usr/src/sys/GENERIC  amd64)

and have a MTP-raidcard with a configured mirror.=20
mpt0 Adapter:
       Board Name: SAS3041E
   Board Assembly: L3-01101-04F
        Chip Name: C1064E
    Chip Revision: UNUSED
      RAID Levels: RAID0, RAID1, RAID1E
    RAID0 Stripes: 64K
   RAID1E Stripes: 64K
 RAID0 Drives/Vol: 2-10
 RAID1 Drives/Vol: 2
RAID1E Drives/Vol: 3-10

Now I want to split this mirror into standalone drives but I dont know =
if its possible. Since Im using
zfs anyway it seems better to let zfs take care of the mirroring giving =
it the possibility to self heal
and so on. and of course ease of administration.

When consulting the manual i see this:

     clear   Delete the entire configuration including all volumes and =
spares.
             All drives will become standalone drives.

and=20

     delete volume
             Delete the volume volume.  Member drives will become =
standalone
             drives.

IF! what this does is just leave da0 as one of the disks and makes the =
other disk in the mirror
available to the operating system as da1 then everything should be fine. =
But I cant take the risk
if everything goes boom. :D

Is there anyone that has any experience in this situation?