On 8/1/2013 3:39 AM, Richard Elling wrote:
Eh? Cylinders?
The ZFS label already reserves 8KB of space at the front so that it will
not clobber an SMI label.
The actual data use begins at a 4MB offset, past the ZFS labels and
reserved space.
In other words, why would you purposefully misalign?
Well, obviously I wouldn't *purposefully* misalign, but I can't rule out
the possibility of *incompetently* misaligning ;).
I think you are talking about the case when you give zfs an entire disk?
In that case, yes, I understand there is no extra magic to be performed.
However, I am specifically talking about the case of the rpool, in which
you currently cannot give zfs the entire disk, but must give it a slice
of an SMI labeled disk.
In that case, you have the fdisk partitioning, in which from what I
understand the Solaris partition typically starts with a one cylinder
offset. So, when you give zfs the first slice of the Solaris partition,
it already has an offset. Are you saying zfs refers to the fdisk
partition, figures out where on the disk the first slice actually
starts, and then just does the right thing? I did not believe that to be
the case...
_______________________________________________
OmniOS-discuss mailing list
OmniOS-discuss@lists.omniti.com
http://lists.omniti.com/mailman/listinfo/omnios-discuss
