AW: AW: AW: AW: AW: ZFS: Corrupted pool metadata after adding vdev to a pool - no opportunity to rescue data from healthy vdevs? Remove a vdev? Rewrite metadata?

[Volodymyr Kostyrko]

18.09.2012 14:23, Gary Palmer wrote:
>>   From my point of view all hype about moving to 4k sectors is highly
>> irrelevant to ZFS and current products on the market.
>>
>> 1. ZFS tends to use big recordsize for storing any data. This means most
>> files on your drives are already stored in 128k sectors. Storing small
>> tails in 512b or 4k sectors shouldn't give big difference.
>
> Performance testing has shown that running "advanced format" (aka 4kilobyte
> sector disks) with 512 byte alignment with ZFS seriously degrades performance
> compared to running with 4 kilobyte alignment.

Please understand me correctly, this is only my point of view on the 
problem as I never saw any tests that show difference between correct 
alignment of _partitions_ and alignment on _records_ on ZFS. This area 
is not thoroughly covered with test data.

-- 
Sphinx of black quartz judge my vow.