Reputation: 111
I'm writing a script that tests the read and write speeds of my HDD. I've been able to output the read speeds using the hdparm command. I'm using this line to test the write speeds: dd if=/dev/zero of=/tmp/test.data bs=1k count=128k
This outputs to the window:
131072+0 records in 131072+0 records out 134217728 bytes (134 MB) copied, 1.18678 s, 113 MB/s
I tried using >> and > to output the results to the text file and these didn't work. Does anyone know how I can output my results to a text file?
Upvotes: 10
Views: 8731
Reputation: 2909
dd's good for sequential writes, but also check into iozone and bonnie. Seeks within a track tend to be far faster than seeks from one track to another, so random I/O can be very different from sequential.
Upvotes: 0
Reputation: 7403
They're output to stderr, so try using 2>
instead of >
dd if=/dev/zero of=/tmp/test.data bs=1k count=128k 2> output.txt
Upvotes: 15