[rescue] Drive speed test

CLIFFORD HAIGHT klemish at hotmail.com
Tue Mar 15 13:44:07 CDT 2016

so how accurate are the values if I do

time sh -c "dd if=/dev/null of=/tmp/tempfile bs=1024 count=10240"
time sh -c "dd if=/tmp/tempfile of=/dev/null bs=1024 count=10240"

When running this on  the in Solaris 8 from openwidows, I got 1.2 write and .2
read consistently
When running on inside CDE I got something like 9.8-10.2s for write as I

This is using the SCSI to SD adapter

On a different SparcStation running SunOS4 I got the same read speed but about
half as much write speed.
This is using 1.2GB 5400rpm conner "SUN1.02" drive.

Both these value seem beyond the capability if SCSI-2 controller.    When I
did run the test in CDE I had a CD mounted, where as the other two instances
had no other drives mounted.

Does having other device mounted really effect disk throughput that much?

I have a sunswift card  and a 711 enclosure that I haven't tested yet.  Would
using  this card affect disk speed of internal drive at all.

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