[OpenIndiana-discuss] OI 151_a7 install on 4k sector disk

[Reginald Beardsley]

Doesn't work w/ an initial offset of 256 either.  I suspect that it's something to do w/ it being an USB disk.  It's been an EFI label in both instances.  I tried offsets from 34 to ~64 w/o any change in behavior.

BTW what's the deal w/ 34?  If you try to set anything smaller it's disallowed, though I did manage somehow to get it set to 6.  There is a *lot* of inconsistency in the rules in the various parts of the format(1m) utility.

I had to dd /dev/zero to straighten up one of the messes I made.  I got into a situation where I could not write a label at all until I did that.

It would be really nice if one could do a zfs send to an USB disk for backup.  Even better if you could form a USB based RAIDZ w/ 3 TB disks.

Have Fun!
Reg

--- On Sat, 1/26/13, Jim Klimov <jimklimov at cos.ru> wrote:


> Well, to be pedantic, I'd add that ashift only dictates
> minimum block
> size and alignment relative to the storage device provided
> to ZFS -
> the slice or partition. Hardware-alignment of 4kb writes
> would also
> need that the partition itself is aligned with 4KB sectors -
> i.e. that
> its starting offset is divisible by 8 (in classic 512b
> sector count).
> If you dedicate the disk to ZFS and it is automatically
> partitioned
> with GPT, then the problem is taken care of - with offset
> being 256.
> On MBR the default offset is 34 or so, and can present a
> problem that
> is solvable by manual partitioning.
> 
> HTH,
> //Jim
> 
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