Subject: Re: accessing IDE hard drive via pcmcia card (redirected from
To: None <email@example.com>
From: M. Warner Losh <firstname.lastname@example.org>
Date: 05/22/2004 23:11:19
In message: <20040523004211.GA18223@drowsy.duskware.de>
Martin Husemann <email@example.com> writes:
: On Sun, May 23, 2004 at 08:10:00AM +0900, ITOH Yasufumi wrote:
: > I think the problem is that the pcmcia/cardbus driver turns
: > on and off the device too frequently during probe/attach (kern/8731).
: It's been a while, but last I looked there was one power up-probe-power-down
: phase, optionally followed by another power-up-on-mount. I don't see how you
: could optimize that.
More like two or three power cycles before mounting /. At least in
the 1.6 time frame on my hpcmips machine for the microdrive I use as
my root device.
FreeBSD powers things up once, and it turns out to be a lot faster to
do it this way for real spinning media. Turns out to be about a wash
for non-spinning media or network devices.