GEOM_MIRROR: Device gm0: provider ad0 disconnected

[Nejc Škoberne]

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