Date: Tue, 31 Oct 2000 23:11:25 +0100 From: "Rick Jansen" <Rick@Tweakers.net> To: <freebsd-questions@freebsd.org>, <questions@freebsd.org> Subject: 15000rpm SCSI3 Ultra160Wide LVD Harddisks gets just 4769 K/sec (bonnie) Message-ID: <005401c04387$82a3c230$7300a8c0@hephaistos>
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Hi there,
I have a hardware RAID-5 setup, using 3 Cheetahs 18.9Gb 15000rpm. When i run
Bonnie, this is the output:
bash-2.04$ bonnie
File './Bonnie.248', size: 104857600
Writing with putc()...done
Rewriting...done
Writing intelligently...done
Reading with getc()...done
Reading intelligently...done
Seeker 1...Seeker 2...Seeker 3...start 'em...done...done...done...
-------Sequential Output-------- ---Sequential
Input-- --Random--
-Per Char- --Block--- -Rewrite-- -Per
Char- --Block--- --Seeks---
Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec
%CPU
100 4769 13.4 4814 4.1 5767 5.7 24421
100.0 239718 96.4 31833.2 199.6
bash-2.04$
This seems really bad to me, on a "normal" system i get measurements maybe 8
higher then this. What could be causing this? No use of DMA? How can i see
whether it's using DMA? And how do i enable it?
The SCSI Caching Raid controller is an Adaptec 2100s. Also, the creation of
the 35Gb Raid array took 4 hours to complete. The server is going to be a
database server.
Could somebody please tell me what's going on?
Rick Jansen
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