Move data from 3ware RAID-1 disk to MB disk

Stanislav stanislav at
Mon Jun 16 13:19:45 UTC 2008

Dear Johan,

But hetzner support told me that data will be lost if connect disk to
motherboard controller:
"If we connect the HDD's on the Mainboard-controller, they were detected as
empty HDD, because the controller write the sectors in a other way, like the

But I think that maybe 3ware writes their RAID table somewhere near MBR record.
So maybe I have to rewrite MBR and that disk will work on motherboard

I have backups, but this is production system, and I want to switch to
MB controller with minimal downtime.

Kind Regards

2008/6/16 Johan Hendriks <Johan at>:
>>I have FreeBSD 7.0 with 3ware 8006-2LP RAID-1 controller hosted at
>>Now I want remove 3ware controller, and to stay with motherboard
>>controller. Is it possible to do without data loss?
>>I suggest to move one disk to motherboard controller, than boot via
>>LAN to Linux rescue, and than do "dd" from 3ware to MB disk.
>>Is it possible to do so or I will copy 3ware RAID table, and MB disk
>>will not be bootable?
>>Kind Regards
> I freebsd detect the onboard controller and the drives on it, all you
> need to do is to make sure /etc/fstab points to the right disks.
> Now it probberly points to /dev/twe0s1* and so on if your onboard
> controller uses ad then it needs to be changed to /dev/da0s1*
> Make sure you have backups!!!!!!!!!!!!!!!!!!!!!!
> Regards,
> Johan

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