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Date:      Fri, 27 Jul 2007 09:18:19 +0200
From:      =?ISO-8859-2?Q?Nejc_=A9koberne?= <nejc@skoberne.net>
To:        questions@FreeBSD.org
Subject:   GEOM_MIRROR: Device gm0: provider ad0 disconnected
Message-ID:  <46A99C3B.8050203@skoberne.net>

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Hello,

I have a FreeBSD 5.3 system with two IDE disks. This is the dmesg at
boot time:

ad0: 117246MB <Maxtor 6B120P0/BAH41G10> [238216/16/63] at ata0-master UDMA100
ad2: 117246MB <Maxtor 6Y120L0/YAR41BW0> [238216/16/63] at ata1-master UDMA100
GEOM_MIRROR: Device gm0 created (id=2190829866).
GEOM_MIRROR: Device gm0: provider ad0 detected.
GEOM_MIRROR: Device gm0: provider ad2 detected.
GEOM_MIRROR: Device gm0: provider ad2 activated.
GEOM_MIRROR: Device gm0: provider mirror/gm0 launched.
GEOM_MIRROR: Device gm0: rebuilding provider ad0.
GEOM_MIRROR: Device gm0: provider ad0 disconnected.

The problem is that after reboot the gm0 mirror is DEGRADED. Why? After I
"gmirror forget" it and then "gmirror insert" it back, it is COMPLETE again.
I have tried to read all sectors of the drive but the drive seem not to be
failing (smartctl also shows no indication of an error). This started to happen
after a while; before (quite some time after gmirror was set up), everything
worked perfectly.

Any ideas?

Thanks,
Nejc




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