zfs discuss - Apr 2010 - Disk/Partition replacement - do partition begin/end/offsets matter?

One of my pools (backup pool) has a disk which I suspect may be going south. I
have a replacement disk of the same size. The original pool was using one of the
partitions towards the end of the disk. I want to move the partition to the
beginning of the disk on the new disk.

Does ZFS store/use partition start/end/offsets of partitions etc? Or is it just
about:

1. Export the pool.
2. dd if=<old_partition> of=<new_partition>
3. Take the old disk out
4. Import the pool.

I think the question in nutshell is: Do the partition begin/end matter if the
partition is same size?
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This message posted from opensolaris.org

> One of my pools (backup pool) has a disk which I
> suspect may be going south. I have a replacement disk
> of the same size. The original pool was using one of
> the partitions towards the end of the disk. I want to
> move the partition to the beginning of the disk on
> the new disk.
> 
> Does ZFS store/use partition start/end/offsets of
> partitions etc? Or is it just about:
> 
> 1. Export the pool.
> 2. dd if=<old_partition> of=<new_partition>
> 3. Take the old disk out
> 4. Import the pool.
Better to mirror onto the new disk and then remove the old disk. Then you only
copy the blocks that are used.

> 
> I think the question in nutshell is: Do the partition
> begin/end matter if the partition is same size?
No.

--chrris
-- 
This message posted from opensolaris.org

I went through with it and it worked fine. So, I could successfully move my ZFS
device to the beginning of the new disk.
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This message posted from opensolaris.org