On Monday, January 05, 2015 21:21:25 Stan Hoeppner wrote:
> > I didn't test however how it compares to default settings on the
> > same drive which would set it to 512 B.
> As long as your underlying partition is 4KB aligned the only advantage
> you'll likely see with 4B sectsz is a little faster log IO. So for non
> metadata heavy workloads you won't see any difference between 512B and
> 4KB sectsz.
It's actually created by gparted with 1 MB alignment, so it's implicitly 4 KB aligned as well. I guess something else is causing the slowness or it's just subjective. Raw I/O performance test looks normal with hdparm.
Here is what gdisk reports (third partition is the XFS one):
Found valid GPT with protective MBR; using GPT.
Disk /dev/sda: 3907029168 sectors, 1.8 TiB
Logical sector size: 512 bytes
Disk identifier (GUID): ...
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 3907029134
Partitions will be aligned on 2048-sector boundaries
Total free space is 4205 sectors (2.1 MiB)
Number Start (sector) End (sector) Size Code Name
1 2048 534527 260.0 MiB EF00
2 534528 1763327 600.0 MiB 0700
3 1763328 3904931839 1.8 TiB 0700
4 3904931840 3907026943 1023.0 MiB 8200