dd of=/dev/null if=/dev/sda bs=128k count=80k iflag=direct 81920+0 records in 81920+0 records out 10737418240 bytes (11 GB) copied, 83.8293 seconds, 128 MB/s Is it ok to use "sda" as a file in "dd" test? Thanks! On Wed, Apr 20, 2011 at 5:24 PM, Joe Landman <landman at scalableinformatics.com> wrote: > On 04/20/2011 06:49 PM, Mohit Anchlia wrote: >> >> Numbers look very disappointing. I destroyed RAID0. Does it mean disks >> on all the servers are bad? > > [...] > >> [root at dslg1 ~]# dd if=/dev/zero of=/dev/sda bs=128k count=80k oflag=direct >> 81920+0 records in >> 81920+0 records out >> 10737418240 bytes (11 GB) copied, 572.117 seconds, 18.8 MB/s > > how about the read? > > > > -- > Joseph Landman, Ph.D > Founder and CEO > Scalable Informatics, Inc. > email: landman at scalableinformatics.com > web ?: http://scalableinformatics.com > ? ? ? http://scalableinformatics.com/sicluster > phone: +1 734 786 8423 x121 > fax ?: +1 866 888 3112 > cell : +1 734 612 4615 >
