On 29/04/2013, at 8:21 PM, James Harper <james.harper@bendigoit.com.au> wrote:
along with the kernel version and arch, filesystem, layers (lvm, md, etc), and underlying hardware?
I get: # dd if=/dev/zero of=test.bin bs=512 count=128 oflag=sync 128+0 records in 128+0 records out 65536 bytes (66 kB) copied, 0.113709 s, 576 kB/s That's an Oracle Linux VM running on Oracle VM 3.2 running our 3.7 playground kernel. The filesystem is ext4. The disk is virtual, sitting on an OCFS2 filesystem on a local 7.2k RPM disk. Alternatively: # dd if=/dev/zero of=test.bin bs=512 count=128 oflag=sync 128+0 records in 128+0 records out 65536 bytes (66 kB) copied, 0.183353 s, 357 kB/s That's another Oracle Linux VM running our UEK2 (3.0) kernel. Also ext4, the disk is virtual backed over iSCSI to an OCFS2 shared filesystem on a QNAP NAS. Cheers, Avi