centos 7 dd测试硬盘读写性能

Enjoy it since being fucked is unavoidable
中大放羊哥
周四, 09/26/2019 - 01:56

https://www.shellhacks.com/disk-speed-test-read-write-hdd-ssd-perfomanc…

我的西数蓝盘,通过mini-pcie转接的卡转接到主板的:
dd if=tempfile of=/dev/null bs=1M count=1024
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 1.24909 s, 860 MB/s

dd if=tempfile of=/dev/null bs=1M count=1024
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 0.233601 s, 4.6 GB/s

HDPARM

NVME它分的两个区:
sudo hdparm -Tt /dev/nvme0n1p1

/dev/nvme0n1p1:
Timing cached reads: 9948 MB in 2.00 seconds = 4982.58 MB/sec
Timing buffered disk reads: 1024 MB in 1.27 seconds = 808.23 MB/sec

sudo hdparm -Tt /dev/nvme0n1p2

/dev/nvme0n1p2:
Timing cached reads: 10496 MB in 2.00 seconds = 5257.21 MB/sec
Timing buffered disk reads: 2234 MB in 3.00 seconds = 744.67 MB/sec

我想大概是应为mini-pcie转接之后,interface限制了吧。否则,西数蓝盘不是应该达到1700M/s吗?

所以,打算把现在这些低端的主板都清理了,换两块支持pcie 3代的华硕主板。

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