On Tuesday, January 06, 2015 11:02:09 Eric Sandeen wrote:
> On 1/4/15 6:56 PM, Hillel Lubman wrote:
> > Hi.
> > Can you please clarify what after all is the recommended sector size
> > for such drives and why isn't it a default in mkfs.xfs (since
> > supposedly defaults are generally recommended optimal settings unless
> > you have some special use case).
> It is indeed the default.
> [root@sandeen ~]# blockdev --getss --getpbsz /dev/sde
> however, some drives lie about these sizes, and then mkfs.xfs can't know.
> Try the blockdev command above to see.
I see. Indeed, on the drive where I get sectsz as 512 by default, blockdev --getss --getpbsz reports:
However hdparm -I reports:
Logical Sector size: 512 bytes
Physical Sector size: 4096 bytes
So is it still worthwhile making sectsz 4 KB explicitly instead of using mkfs.xfs default in such case? And on a side note, since there is a more reliable way to figure that info out, may be mkfs.xfs should rather use that?