On Mar 6, 2011, at 9:02 PM, objectwerks inc wrote:
> > On Mar 6, 2011, at 6:49 PM, Chris Murphy wrote: > >> Anyone have any idea why I'm getting a 6x difference in performance between >> two OS's on the exact same hardware? >> >> /dev/disk0 and /dev/sda are the exact same internal SATA drive. > > > Do you have the linux disk mounted async? My understanding is that linux > does that by default while most other OSes do not. Or something like that. > What file system is on the linux side? This test was not done on a mounted volume, but rather as a block level device. File system isn't relevant. Since I didn't specify a starting point, it started reading at LBA 0 and read in 1GB worth of data then stopped. When I did this as a write test onto flash RAM, they were likewise not mounted nor were they partitioned or formatted. Just writing zeros to them. That came up as 4.8MB/sec for Mac OS and 13.8MB/sec for Linux. Chris Murphy_______________________________________________ MacOSX-admin mailing list [email protected] http://www.omnigroup.com/mailman/listinfo/macosx-admin
