Re: general speed differences between 4.1.1-RELEASE and 4.3-RELEASE

[Ed Hudson]

fyi, here's another hw.ata.wc=1 vs hw.ata.wc=0 comparison:


4.3-RELEASE install, ASUS A7V, 800mhz, hw.ata.wc=0, express install +all,
        60gig wd-600b udma100 drive, partitioned as:

                /        8192m
                swap     1024m
                /xtra   48023m

        installed from 52x cdrom.
        install time: 27minutes, 38 seconds (1658 seconds).

a modified 4.3-RELEASE install iso (modified by replacing /floppies/boot.flp
loader.rc/support.4th and adding a loader.conf, setting hw.ata.wc=1) file,
written to cd.

same partition, same install (express + all)

        install time:  8minutes, 59 seconds ( 539 seconds)

        4.3-with-wc=1 / 4.3-with-wc=0 :  3.07x

in both installation cases both filesystems were newfs'd, but the
speed difference is evident everywhere during the install.

i would urge the FreeBSD lords to consider mr. silbersack's proposal
of either remaking hw.ata.wc=1 the default, or at least, consider making
this the default for the base install.  perhaps something analagous
to the security settings (reliability settings) would be as reasonable
paradigm ?

thanks!

                -elh




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