# [OmniOS-discuss] [zfs] SSD alignment, EFI label rpool support

Paul B. Henson henson at acm.org
Fri Aug 2 02:30:20 UTC 2013

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    On 8/1/2013 1:27 PM, Matthew Ahrens wrote:
    > It's hard for me to see how aligning the partition on a greater
    > granularity than the physical sector size (aka "ashift", typically 4k
    > for modern large devices) would help anything.  Regardless of partition
    > alignment, ZFS is going to write to whatever sectors it wants.

    Well, as I originally indicated, this suggestion came from the linux
    world, and was more perhaps intended for ext3/4 use cases, they discuss
    setting the stride and stripe-width options for ext filesystems to
    optimize for the page/erase block size. I wasn't really sure if that was
    relevant for ZFS, which is why I asked :).

    Thanks…

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