您当前的位置:
$ cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid -o value -s UUID' to print the universally unique identifier
# for a device; this may be used with UUID= as a more robust way to name
# devices that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc nodev,noexec,nosuid 0 0
/dev/sda1 / ext4 errors=remount-ro 0 1
# /opt was on /dev/sda7 during installation
UUID=5ce518a4-0f46-4688-8002-84bac2330282 /opt btrfs defaults 0 2
# /srv was on /dev/sda6 during installation
UUID=19573a64-f0a6-4250-a9fd-532e3d4e3477 /srv ext4 defaults 0 2
# swap was on /dev/sda5 during installation
UUID=0f2e2f50-d989-47bf-afb7-7593888222cf none swap sw 0 0
neo@neo-Vostro-3400:~$ time dd if=/dev/zero of=/srv/file bs=1M count=100
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.500941 s, 209 MB/s
real 0m0.521s
user 0m0.000s
sys 0m0.140s
neo@neo-Vostro-3400:~$ time dd if=/dev/zero of=/srv/file bs=1M count=100
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.672553 s, 156 MB/s
real 0m0.698s
user 0m0.000s
sys 0m0.160s
neo@neo-Vostro-3400:~$ time dd if=/dev/zero of=/opt/file bs=1M count=100
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.0987276 s, 1.1 GB/s
real 0m0.133s
user 0m0.000s
sys 0m0.120s
neo@neo-Vostro-3400:~$ time dd if=/dev/zero of=/opt/file bs=1M count=100
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.101664 s, 1.0 GB/s
real 0m0.134s
user 0m0.000s
sys 0m0.140s
neo@neo-Vostro-3400:~$ time dd if=/dev/zero of=/srv/file bs=1M count=1000
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 11.8609 s, 88.4 MB/s
real 0m11.914s
user 0m0.010s
sys 0m1.360s
neo@neo-Vostro-3400:~$ time dd if=/dev/zero of=/opt/file bs=1M count=1000
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 9.80331 s, 107 MB/s
real 0m9.860s
user 0m0.000s
sys 0m0.880s
neo@neo-Vostro-3400:~$