0

I want to connect a relatively low-speed SSD to a PowerEdge R900 because I need something with a decent read/write speed (nothing over 35-40MB/s) and I was having trouble identifying which USB 2.0 port is High-speed USB 2.0. This seemed like something the community should have an answer publicly available for.

Anyone know whether the High-speed USB 2 (480mb/s) is the internal port? I've seen a High-speed USB 2 bus listed in lspci in addition to a regular USB 2 (12mb/s) bus, but I haven't actually found the High-speed USB 2.0 port. Anyone know which port it is?

KG6ZVP
  • 131
  • 9
  • 1
    Why do you think there is only a single USB 2.0 Port? Have you tried looking at the manual? http://www.dell.com/support/home/us/en/19/product-support/product/poweredge-r900/research – Zoredache Oct 07 '14 at 22:29
  • I can't really assume that it has only one. I will correct my original question. I have looked at the manual, but it doesn't say anything about Hi-speed USB 2.0 vs regular USB 2.0. All I can say is that the first port I plugged into on the front runs much slower in a speed test. – KG6ZVP Oct 07 '14 at 22:44
  • 1
    The usb 1 port you see in lspci is likely from idrac - all the real ports should be usb 2. – Grant Oct 07 '14 at 22:50

2 Answers2

1

As implied by @Zoredache your premise is flawed.

All USB 2.0 ports are 480mb/sec and according to this link all the USB ports are USB 2.0 - including the internal, 2 front and 2 rear ports.

USB 1.x is limited to 12 megs, not USB 2.0 - see here.

davidgo
  • 5,964
  • 2
  • 21
  • 38
-1

On the R320 & R520 The rear ports are faster than the front ports. I was trying to backup a server using a USB connected hard disk and when connected to the front port I could only get 20Mb/s max with a DiskSpd test. When connecting to the rear ports I got a much better 40Mb/s and the Veeam backup was nearly 4 x faster

user388288
  • 1