Re: Hard disk is too slow on NetBSD-5.0.1/x86_64

[Steve Woodford <scw%NetBSD.org@localhost>]

On Tuesday 12 January 2010 18:05:04 Aleksey Cheusov wrote:

> With ACPI enabled in BIOS and patched kernel:
> wd0d:  23Mb/s
> rwd0d: 66Mb/s

In a nutshell, read/write requests for the block device (wd0d) go 
through the buffer cache (man buffercache) whereas the character device 
(rwd0d) uses physio(9) to read/write the userland buffer directly.

Steve