svn commit: r216230 - head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs

Ivan Voras ivoras at
Mon Dec 6 19:23:26 UTC 2010

On 6 December 2010 19:44, Pawel Jakub Dawidek <pjd at> wrote:
> On Mon, Dec 06, 2010 at 12:18:03PM +0000, Ivan Voras wrote:
>> Author: ivoras
>> Date: Mon Dec  6 12:18:02 2010
>> New Revision: 216230
>> URL:
>> Log:
>>   Use GEOM stripesize field when calculating ashift. This will enable correct
>>   alignment on drives with large sector sizes (e.g. 4 KiB) but the
>>   implementation might need to be revisited if devices with large stripesizes
>>   appear (e.g. if RAID controllers or flash drives start using the field),
>>   probably by introducing a physsectorsize field in GEOM providers.
> Please back this out as soon as possible!

Given information such as this:

and my last message on the subject in the thread:

Can you explain why is it wrong, and what can go wrong with changing
ashift in this way?

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