[ovirt-users] 4k alignment on FC LUN

Nir Soffer nsoffer at redhat.com
Wed Jul 6 11:27:09 UTC 2016


On Wed, Jul 6, 2016 at 12:18 AM, David Twersky <dmtwersky at gmail.com> wrote:
> We use a lot of flash arrays, and some of them require that devices be 4k
> aligned, is it possible to create a Fibre Channel Storage Domain and have it
> 4k aligned?

I don't think we support this.

For example, we assume that writing 512 bytes blocks is atomic, if these
writes will fail because the minimal block is 4k, block storage metadata
operations will fail.

Anyway, why not try to add such lun and create a storage domain for testing?

Nir



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