????c.????IO??????д?????
# time dd if=/dev/sda1 of=test.dbf bs=8k
13048+1 records in
13048+1 records out
3.73s real 0.04s user 2.39s system
# du -sm test.dbf
103 test.dbf
?????????????????????С????????ο?.
??????????????:
?????????linux?????????IDE/ATA???????????????÷?Χ?о?????;(????????????????????IO?????????????????????????ο?man???)
????????????????????????????п?????????????????????????????????????ο??????????????.