Subject: Re: problems with 1.6ZE
To: Manuel Bouyer <email@example.com>
From: Jukka Marin <firstname.lastname@example.org>
Date: 11/02/2003 20:08:59
On Sun, Nov 02, 2003 at 02:17:29PM +0100, Manuel Bouyer wrote:
> On Fri, Oct 31, 2003 at 04:32:51PM +0200, Jukka Marin wrote:
> > The command completes OK, but if I fsck the CF card, I get:
> > # fsck -f /dev/rwd1a
> > ** /dev/rwd1a
> > BAD SUPER BLOCK: VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE
> > LOOK FOR ALTERNATE SUPERBLOCKS? [yn] n
After sending this message, I found out that reading the CF works OK, but
writing is unreliable.
> > The same card and same image works OK on an HP laptop. A different CF
> > card works OK on the HP _and_ my laptop. Both cards are Kingston 128 MB
> > cards. The ones that do now work are a bit newer:
Should read ".. do NOT work.." ;)
> > wd1 at atabus2 drive 0: <SAMSUNG CF/ATA>
> > wd1: drive supports 4-sector PIO transfers, LBA addressing
> > wd1: 124 MB, 496 cyl, 16 head, 32 sec, 512 bytes/sect x 253952 sectors
> > The older cards look like this:
> > wd1 at atabus2 drive 0: <TOSHIBA THNCF128MMA>
> > wd1: drive supports 1-sector PIO transfers, LBA addressing
> > wd1: 122 MB, 978 cyl, 8 head, 32 sec, 512 bytes/sect x 250368 sectors
> > The problem existed with an older kernel (1.6W) as well.
> Could you try to force it to 1-sector PIO transfer ?
> Just force wd->sc_multi to 1 in wd.c:wdattach() line 326
This fixes the problem. So I guess the Samsung cards are lying when they
claim to support 4-sector transfers? Or is there a bug in the NetBSD driver
Why doesn't this problem show up on a slower HP laptop, but only on my
2 GHz IBM?
P.S. Using 1-sector transfers on the real HD is S L O W ;-)