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--- doc:appunti:hardware:raspberrypi_nas_networking [2021/03/11 09:56] – [Transfer rate] niccolo
+++ doc:appunti:hardware:raspberrypi_nas_networking [2021/04/02 13:18] – [Hard disk performance] niccolo
@@ Line 13: / Line 13: @@
 ===== Samba =====
+FIXME
 ===== Transfer rate =====
@@ Line 21: / Line 23: @@
 | LaCie d2 Network   | WDC WD10EFRX-68FYTN0, 1Tb, 5400 rpm       |   13 |  87.5 |
 | QNAP TS-120        | Hitachi Deskstar 7K1000.B, 1Tb, 7200 rpm  |   98 |  12.7 |
+===== Hard disk performance =====
+To measure the hard disk **read performance** we copied a large file of about **3 Gb** into **/dev/null**, this is the result timing:
+^ Interface  ^   Mb/s ^
+| USB 2      |   31.8 |
+| USB 3.0    |  184.8 |
+If you are interested in transferring large files across the network, beware that a **100 Mbit LAN** imposes a limit of **14.7 Mb per second**, so the **USB 2** interface is enough to sustain that. But if you are interested into **Gbit Ethernet** performance offered by the Raspberry Pi 4, you definitely need to use the **USB 3.0** interface.