Date: Wed, 18 Aug 1999 13:19:16 -0700 (PDT) From: "Andrew Atrens" <atrens@nortelnetworks.com> To: Doug Ambrisko <ambrisko@whistle.com> Cc: current@FreeBSD.ORG Subject: Re: cd writer recommendation? Message-ID: <199908240628.XAA04885@gilliam.users.flyingcroc.net>
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On Wed, 18 Aug 1999, Doug Ambrisko wrote:
> I think that most IDE CD-R/CD-RW will just work using Soren's ata driver
> in current. I'm doing that on my laptop right now with a hacked pccard and
> hacked ata driver. Also I have an external IDE hard disk as well. I do have
> a problem with buffer underflows when do a mkisofs to a 4X write over
> PCMCIA. 2X works fine.
Making your dd blocksize a multiple (say 10) of physical blocksize should
cure this. I use something like:
AUBLKSIZE=2352
AUWRSIZE=5
AURDSIZE=`expr $AUWRSIZE '*' 2`
OBS=`expr $AUBLKSIZE '*' $AUWRSIZE`
IBS=`expr $AUBLKSIZE '*' $AURDSIZE`
rtprio 5 team -v 1m 5 <$1 | \
rtprio 4 dd ibs=$IBS of=$WORM obs=$OBS conv=osync || exit
ymmv,
Andrew.
--
+--
| Andrew Atrens Nortel Networks, Ottawa, Canada. |
| All opinions expressed are my own, not those of any employer. |
--+
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