How to see network card and disk speed

Sometimes, you may want to know the hardware speed limit for network interface cards and disks.

Network Interface Card

I use commands

dmesg | grep -i ethernet
dmesg | grep -i infiniband

The output looks like

Intel(R) Gigabit Ethernet Network Driver - version 2.1.0-k2-1
igb 0000:0b:00.0: Intel(R) Gigabit Ethernet Network Connection
igb 0000:0b:00.1: Intel(R) Gigabit Ethernet Network Connection

and

mlx4_ib: Mellanox ConnectX InfiniBand driver v1.0 (April 4, 2008)
Registered RDS/infiniband transport

I also use command

/sbin/lspci

The output has following useful information

0b:00.0 Ethernet controller: Intel Corporation 82575EB Gigabit Network Connection (rev 02)
0b:00.1 Ethernet controller: Intel Corporation 82575EB Gigabit Network Connection (rev 02)
10:00.0 InfiniBand: Mellanox Technologies MT26418 [ConnectX VPI PCIe 2.0 5GT/s - IB DDR / 10GigE] (rev a0)

Disk

/sbin/lspci | grep -i ata

Other useful tools

mii-tools
hdparm

They need root privilege usually.