Dear Friends;
I have servers which contain SATA disks and SAS disks. I was testing the speed of writing on these servers and I recognized that SAS 10.000 disks much more slowly than the SATA 7200. What do you think about this slowness? What are the reasons of this slowness?
Thank you for your help.
I am giving the below rates (values) which I took from my test (from my comparisons between SAS 10.000 and SATA 7200);
dd if=/dev/zero of=bigfile.txt bs=1024 count=1000000 when this comment was run in SAS disk server, I took this output(10.000 rpm)
(a new server,2 CPU 8 core and 8 gb ram)
1000000+0 records in
1000000+0 records out
1024000000 bytes (1.0 GB) copied, 12.9662 s, 79.0 MB/s (I have not used this server yet) (hw raid1)
The PC with SATA disk gives below rate (value) 7200 rpm
1000000+0 records in
1000000+0 records out
1024000000 bytes (1.0 GB) copied, 5.55338 s, 184 MB/s (this is proxy server with 100 users)(sw raid1)
Another server which has 10.000 rpm (an old server)
1000000+0 records in
1000000+0 records out
1024000000 bytes (1.0 GB) copied, 4.51519 seconds, 227 MB/s (e mail server) (hw raid5)
4 core HP server; (7200 Rpm)
1000000+0 records in
1000000+0 records out
1024000000 bytes (1.0 GB) copied, 20.1174 s, 50.9 MB/s (sw raid1)
How should I understand these values? I am confused.