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本帖最后由 xhw925 于 2011-06-04 08:04 编辑
按照楼上的命令测试如下:
2000+0 records in
2000+0 records out
2097152000 bytes (2.1 GB) copied, 5.19806 seconds, 403 MB/s
real 0m5.200s
user 0m0.003s
sys 0m3.412s
[root@localhost ~]# time dd if=/dev/zero of=/tmp/test bs=1024k count=2000
2000+0 records in
2000+0 records out
2097152000 bytes (2.1 GB) copied, 3.0522 seconds, 687 MB/s
real 0m4.072s
user 0m0.001s
sys 0m3.583s
[root@localhost ~]# time dd if=/dev/zero of=/tmp/test bs=1024k count=2000
2000+0 records in
2000+0 records out
2097152000 bytes (2.1 GB) copied, 2.74889 seconds, 763 MB/s
real 0m4.422s
user 0m0.005s
sys 0m3.514s |
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