Per Jessen wrote:
Greg Freemyer wrote:
Since 1MB was faster than 1GB for some reason, I would try the 4k one just out of curiosity, but you're likely right it is far slower.
It wasn't that bad - using bs=4k, the file copy was done in 31minutes at 11.5Mb/sec (dd's transfer-rate).
That's still pretty miserable compared to the power of the other server components. A cheap sata raid5 on a 3ware controller is already a step up. This is a raid5 with 5 sata disks (system with 8 GB RAM): dd if=/dev/zero of=/tmp/testfile bs=1024k count=20480 20480+0 records in 20480+0 records out 21474836480 bytes (21 GB) copied, 262.764 s, 81.7 MB/s dd if=/tmp/testfile of=/dev/null bs=1024k 20480+0 records in 20480+0 records out 21474836480 bytes (21 GB) copied, 71.9161 s, 299 MB/s dd if=/tmp/testfile of=/tmp/testfile2 bs=1024k 20480+0 records in 20480+0 records out 21474836480 bytes (21 GB) copied, 636.322 s, 33.7 MB/s The sad fact is that hdd speed, especially access time has not evolved with the same speed as other parts of pc hardware. -- Sandy List replies only please! Please address PMs to: news-reply2 (@) japantest (.) homelinux (.) com -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org