1 |
On Thu, Aug 11, 2011 at 10:12 AM, Grant <emailgrant@×××××.com> wrote: |
2 |
> I'm testing this USB 3.0 bus-powered hard drive: |
3 |
> |
4 |
> http://www.amazon.com/gp/product/B0041OSQ9S |
5 |
> |
6 |
> and I get: |
7 |
> |
8 |
> # hdparm -tT /dev/sdb |
9 |
> /dev/sdb: |
10 |
> Timing cached reads: 8006 MB in 2.00 seconds = 4004.33 MB/sec |
11 |
> Timing buffered disk reads: 252 MB in 3.01 seconds = 83.63 MB/sec |
12 |
> |
13 |
> # hdparm -tT /dev/sdb |
14 |
> /dev/sdb: |
15 |
> Timing cached reads: 8230 MB in 2.00 seconds = 4116.54 MB/sec |
16 |
> Timing buffered disk reads: 252 MB in 3.02 seconds = 83.55 MB/sec |
17 |
> |
18 |
> # hdparm -tT /dev/sdb |
19 |
> /dev/sdb: |
20 |
> Timing cached reads: 8446 MB in 2.00 seconds = 4224.36 MB/sec |
21 |
> Timing buffered disk reads: 230 MB in 3.02 seconds = 76.28 MB/sec |
22 |
> |
23 |
> Wikipedia says USB 3.0 has transmission speeds of up to 5 Gbit/s. |
24 |
> Doesn't MB/sec denote mega*bytes* per second? |
25 |
> |
26 |
> - Grant |
27 |
|
28 |
4000MB/s = 4Gb/s |