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

[Ignatios Souvatzis <is%netbsd.org@localhost>]

On Fri, Jan 08, 2010 at 03:49:02PM +0200, Aleksey Cheusov wrote:
> 
> On freshly installed NetBSD-5.0.1/x86_64 300Gb hard disk works too slowly.
> 
>    dd if=/dev/wd0d of=/dev/null bs=1024k count=100
> 
> command says that data read speed is ~5Mb/s.
> 
> I expect speed about 70Mb/s or so. In dmesg I see the following
> 
>    wd0g: device timeout writing fsbn 245364288 of 245364288-245364303 (wd0 bn 
> 268435455; cn 266305 tn 0 sn 15), retrying
>    pciide0:0:0: timeout waiting for DRQ, st=0x51, err=0x00
> 
> (...)
> What causes this problem and how to fix it?

I notice this:
# bc
obase=16
268435455
FFFFFFF
#

So you're probably a victim of the ATA specification change to disallow
LBA28 starting at that sector. Our driver is changed in -current:

http://mail-index.netbsd.org/source-changes/2009/12/17/msg004516.html
http://releng.netbsd.org/cgi-bin/req-5.cgi?show=1220

Can you try a -current kernel (COMPAT_5),
please?

Regards,
        -is
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