How to mirror the FreeBSD OS on two disks
Warren Block
wblock at wonkity.com
Thu Jul 12 19:00:15 UTC 2012
On Thu, 12 Jul 2012, Wojciech Puchar wrote:
>>>> If that last block is already part of an MBR partition, the more strict
>>>> checking stops booting in 9.0.
>>>
>>> not making MBR partition would not make problems.
>>
>> There's no guarantee that bsdlabel checking won't be made more strict. No
>> matter what type of partitioning scheme, the metadata should not be
>> inside the data area.
>>
> gmirror puts it's metadata at the end of disk.
> bsdlabel is at the beginning. what a problem?
It's not the label, it's what the label declares for the partitions. If
the last partition includes the block of gmirror metadata, that's an
error. Pardon the ASCII diagrams.
Wrong:
partition table
partition 1-------
| |
-----------------
...
partition n-------
| |
|gmirror metadata |
-----------------
Right:
partition table
partition 1-----
| |
---------------
...
partition n-----
| |
---------------
gmirror metadata
| |
---------------
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