[Igor_I]

013
Создание 1 Gb файла из /dev/zero

# time dd if=/dev/zero of=/tmp/test/test1gb bs=1024 count=1024024

1048600576 bytes transferred in 24.572345 secs (42674013 bytes/sec)

0.231u 11.386s 0:24.70 47.0% 25+185k 15+8006io 0pf+0w

1048600576 bytes transferred in 24.291338 secs (43167675 bytes/sec)
0.341u 11.259s 0:24.31 47.6% 25+190k 17+8002io 0pf+0w (reboot)


Model Family: Seagate Barracuda 7200.8 family
Device Model: ST3250823A
Serial Number: 5ND26VCP
Firmware Version: 3.06
User Capacity: 250 059 350 016 bytes
ATA Version is: 7

1048600576 bytes transferred in 20.434582 secs (51315000 bytes/sec)
0.483u 11.367s 0:20.45 57.8% 25+189k 24+8000io 0pf+0w

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014
Копирование 1 Гб файла на другой диск (ad0 > ad3)

# time cp /tmp/test/test1gb /mnt/Umor/test

0.062u 9.185s 0:29.41 31.4% 20+272k 8067+8000io 1pf+0w

0.055u 8.629s 0:27.91 31.0% 20+268k 8074+8000io 0pf+0w (reboot)

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017
Копирование 1 Гб файла в /dev/null

# time cp /tmp/test/test1gb /dev/null

0.024u 3.711s 0:25.27 14.7% 20+269k 8034+0io 0pf+0w

# time cat /tmp/test/test1gb > /dev/null
0.047u 3.748s 0:25.05 15.0% 10+189k 8040+0io 0pf+0w

0.033u 3.682s 0:24.99 14.8% 9+179k 8040+0io 0pf+0w (reboot)

Model Family: Seagate Barracuda 7200.8 family
Device Model: ST3250823A
Serial Number: 5ND26VCP
Firmware Version: 3.06
User Capacity: 250 059 350 016 bytes
ATA Version is: 7

0.046u 3.658s 0:20.36 18.1% 10+194k 8051+0io 0pf+0w