Date: Thu, 20 Nov 2008 00:54:49 +0100 From: Erik Trulsson <ertr1013@student.uu.se> To: Mark Sams <msams992000@yahoo.com.au> Cc: freebsd-stable@freebsd.org Subject: Re: atacontrol missing drive after upgrade to 6.3 Message-ID: <20081119235449.GA23556@owl.midgard.homeip.net> In-Reply-To: <478001.37886.qm@web36105.mail.mud.yahoo.com> References: <610465.33671.qm@web36108.mail.mud.yahoo.com> <20081119191042.GA5284@icarus.home.lan> <957588.98964.qm@web36103.mail.mud.yahoo.com> <20081119193242.GA5739@icarus.home.lan> <20081119194851.GA20898@owl.midgard.homeip.net> <478001.37886.qm@web36105.mail.mud.yahoo.com>
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On Wed, Nov 19, 2008 at 03:43:02PM -0800, Mark Sams wrote:
> > > > > You're using Intel MatrixRAID, aren't you? Please migrate away from
>
> > > > > this immediately, your data is at risk.
>
> Although I am not using Matrix RAID, I guess I will switch to gmirror to be safe. Does the following approach seem valid?
>
You are missing one very important step that you should make regardless of
which approach you use:
0) Make a backup of any and all data that you don't want to lose (and check
that you can restore data from the backup while you still have the
original data.)
>
> 1) Break the mirror (ar0)
> 2) Reboot using ad0
> 3) (from the link
> http://lantech.geekvenue.net/chucktips/jason/chuck/1175552464/index_html ):
>
> Step 1: Use sysctl to allow the mounted disk to be modified
> Step 2: Create the mirror (gm0) using ad0 with gmirror
> Step 3: Modify /boot/loader.conf to load gmirror on startup
> Step 4: Replace ar0 with gm0 in /etc/fstab
> Step 6: Use gmirror insert command to add ad1 to gm0
> Step 7: Check the mirroring status with gmirror statusShould I just call the mirror ar0 instead of gm0 and save doing step4? Any problem with that?
>
> Thanks in advance.
>
> Mark
(Somebody else will have to answer if the above can be expected to work or
not, but I suspect that it would be easier and less errorprone to do as
follow:
1) Make backups of all data
2) Delete the old RAID array.
3) Create a new array from scratch
4) Restore data from backups)
--
<Insert your favourite quote here.>
Erik Trulsson
ertr1013@student.uu.se
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