Date: Wed, 17 Oct 2001 10:38:55 -0700 (PDT) From: Matthew Dillon <dillon@apollo.backplane.com> To: Randell Jesup <rjesup@wgate.com> Cc: freebsd-arch@FreeBSD.ORG Subject: Re: cvs commit: src/sbin/newfs newfs.8 newfs.c Message-ID: <200110171738.f9HHctk99143@apollo.backplane.com> References: <200110110851.f9B8ptf60343@freefall.freebsd.org><20011011112527.A54224@coffee.q9media.com><20011011154203.C44561@dragon.nuxi.com><20011013143225.B4527@ns2.freenix.org><20011013172706.A53976@dragon.nuxi.com><20011014160303.A22301@ns2.freenix.org><20011014194232.A50125@dragon.nuxi.com><00005ba2015f4b07d1@[192.168.1.4]> <0000157003191707d1@[192.168.1.4]>
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:Resend: It appears that the mailer at freebsd.org doesn't like my company's
:mailer and/or reverse-DNS info. Matt; if this doesn't show up in -arch,
:please post it on my behalf.
It showed up.
:>From disklabel.c after my mods from a year or so ago:
:(these are for >1GB partitions)
:
:#define BIG_NEWFS_BLOCK 16384U
:#define BIG_NEWFS_FRAG 4096U
:#define BIG_NEWFS_CPG 64U
:
:You (and others) passed on these patches; the 16k/4k/64 values I took
:(except for cpg) from the CVS log for /usr/src/release/sysinstall/install.c
:(now in Attic).
:
:: Revision 1.244 Thu Aug 5 19:50:25 1999 UTC (2 years, 2 months ago) by phk
::
:: Make the newfs parameters a global option.
::
:: The default is still "-b 8192 -f 1024" but my experiments show that
:: "-b 16384 -f 4096 -c 100" is a more sensible value for modern
:: disksizes.
:
:So, do we really have problems with 16k/4k/64? If so, let's fix the problems.
:Or should we reduce the defaults to 16k/2k? If so, what about existing
:FS's with these values? If values above that are broken, should we
:disable them in newfs, or at least print a warning?
:
:--
:Randell Jesup, Worldgate Communications, ex-Scala, ex-Amiga OS team
The answer is: we don't know. We *used* to have problems with
non 8:1 ratios, but nobody has done any definitive tests recently
and despite Poul's labeling it all FUD, I am unwilling to allow newfs
to default to anything other then an 8:1 ratio.
-Matt
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