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Senior Member
registered user
Re: PDI issue -> USB issue?

Originally Posted by
rwcitek
Can someone stick in a USB stick and try a simple write test?
Had a spare moment to fire up Knoppix and test the USB write performance:
Code:
root@2[uba1]# rw.test () { dd if=/dev/zero of=rw.test.$$ bs=1k count=$1 ; sync ; }
root@2[uba1]# sync ; time -p rw.test 10
10+0 records in
10+0 records out
10240 bytes transferred in 0.000254 seconds (40302038 bytes/sec)
real 0.65
user 0.00
sys 0.00
root@2[uba1]# sync ; time -p rw.test 100
100+0 records in
100+0 records out
102400 bytes transferred in 0.000894 seconds (114545258 bytes/sec)
real 1.29
user 0.00
sys 0.00
root@2[uba1]# sync ; time -p rw.test 1000
1000+0 records in
1000+0 records out
1024000 bytes transferred in 0.017315 seconds (59139134 bytes/sec)
real 9.70
user 0.00
sys 0.02
1 MB/ 10 sec = 0.1 MB/sec
So, 256 MB would take about 40 minutes. That is indeed a long time.
Regards,
- Robert
http://www.cwelug.org/~rwcitek
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