Am 2019-05-29 09:09, schrieb Xiao Ni:
On 05/29/2019 12:21 AM, Song Liu wrote:
On Sun, May 26, 2019 at 2:27 AM Matthew Moore <matthew@moore.sydney>
wrote:
Hi all,
I'm setting up a RAID6 array on 8 * 8TB drives, which are obviously
using 4k sectors. The high-level view is XFS-on-LUKS-on-mdraid6.
Are these driver 4kB native or 512e?
Hi Song
What's the meaning of "4kB native" and "512e" here?
The sector size is 4kB or 512 byte?
For 4kB native, you don't need to do anything.
For 512e, just make sure NOT to create RAID on top of non-4kB-aligned
partitions.
Could you explain more about this?
Regards
Xiao
Hello,
4kB = they expose their 4k sectors also at the interface.
512e = internally, they use (in far the most cases) 4kB sectors
internally, but emulate 512 byte sectors at the interface. Which can
make things slow if structures are not aligned at 4kB boundaries.
Best regards,
Michael Fritscher
