[Watford] SSD performance

[Alain Williams]

Hi,

I got my new machine. I got a SSD disk in there - more to play with. I was
expecting it to be faster than the hard disks that I have, it does not seem so -
unless I have got something wrong

sda: OCZ-OCTANE S2  	http://www.ocztechnology.com/ocz-octane-s2-sata-ii-2-5-ssd.html
sdb: ST2000DM001-9YN1
sdc: ST2000DM001-9YN1

(I don't know what the 9YN1 means)


I did a dd on the system (when quiet) and found that the seagate hard disk is
faster.

The seagate 176 MB/s is close to the spec sheet's ''Maximum sustained data
rate'' of 210MB/s.

The OCZ Octane transfer rate is about 1/2 the ''Max Read: up to 275MB/s''.

I have not (yet) done a random access (lots of seeks) test - which I suspect will show
an improvement.

Comments ?

[root at polo tmp]# time dd if=/dev/sda1 of=/dev/null bs=1024k count=1048576
122103+0 records in
122103+0 records out
128034275328 bytes (128 GB) copied, 927.561 s, 138 MB/s

real    15m27.587s
user    0m0.289s
sys     9m55.271s
[root at polo tmp]# time dd if=/dev/sdc2 of=/dev/null bs=1024k count=122103
122103+0 records in
122103+0 records out
128034275328 bytes (128 GB) copied, 728.605 s, 176 MB/s

real    12m8.611s
user    0m0.508s
sys     5m30.217s



-- 
Alain Williams
Linux/GNU Consultant - Mail systems, Web sites, Networking, Programmer, IT Lecturer.
+44 (0) 787 668 0256  http://www.phcomp.co.uk/
Parliament Hill Computers Ltd. Registration Information: http://www.phcomp.co.uk/contact.php
#include <std_disclaimer.h>