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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 > 512 > 4096 > ... > > 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: 512 512
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?
Regards, Hillel. |
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