My Raid-1 Pentium 100, 32M PC100Ram, Quantum LM20 7200rpm on HighPoint
ATA100 IDE controller machine only can do 13M per sec. Is it normal? What
are the factors determining the transfer rate?

David Kwok

----- Original Message -----
From: Jukka Marin <jmarin@pyy.jmp.fi>
To: Bang Jun-Young <bjy@mogua.org>
Cc: Manuel Bouyer <bouyer@antioche.lip6.fr>; <port-i386@netbsd.org>
Sent: Saturday, December 30, 2000 7:43 PM
Subject: Re: UltraDMA performance.


> On Sat, Dec 30, 2000 at 11:44:21AM +0900, Bang Jun-Young wrote:
> [deleted]
>
> root@tmp ~ # dd if=/dev/rwd0d of=/dev/null bs=8388608 count=100
> 100+0 records in
> 100+0 records out
> 838860800 bytes transferred in 28 secs (29959314 bytes/sec)
>
> NetBSD 1.5P (XSERVER) #0: Thu Dec 28 19:03:21 EET 2000
>     root@tmp:/usr/syssrc/sys/arch/i386/compile/XSERVER
> cpu0: AMD Athlon Model 4 (Thunderbird) (686-class), 900.10 MHz
> pcib0 at pci0 dev 7 function 0
> pcib0: VIA Technologies VT82C686A (Apollo KX133) PCI-ISA Bridge (rev.
0x22)
> pciide0 at pci0 dev 7 function 1: VIA Tech VT82C586A IDE Controller (rev.
> 0x10)
> pciide0: bus-master DMA support present
> pciide0: primary channel configured to compatibility mode
> wd0 at pciide0 channel 0 drive 0: <IBM-DTLA-307030>
> wd0: drive supports 16-sector PIO transfers, LBA addressing
> wd0: 29314 MB, 16383 cyl, 16 head, 63 sec, 512 bytes/sect x 60036480
sectors
> wd0: 32-bit data port
> wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
>
> I haven't been following this thread that closely, but on my system I
think
> the IDE performance is quite OK.  The same disk on my older mb caused lots
> and lots of CRC errors, but it seems to work on this one (KT7 or whatever
> this is :-)
>
>   -jm
>