FTP Mirrors and nfs module

My activity in the last few days concerning my Arch activity has given rise to some questions I hope you guys/gals don't mind to post them in one just one thread. Hopefully this is too the right place to ask them.
1) While performing some searches throughout the forums trying to find information in order to fix a nowadays struggle with Firefox I have seen quite a number of recommendations that addressed the OP to avoid ftp mirrors (fixing apparently library issues, changing mirrors). In my case since my early Debian days have always seen the ftp mirror, the pair to the http one that is, as a fallback mirror when the latter failed at some point, and viceversa. Therefore I usually have always commented out both the http and the ftp one. Did I do wrong all this time, even now in Arch?
If someone could enlighten me with regard to this 'avoid ftp mirros' recommendation I would appreciate it.
2) After one of the latest updates when processing the User modules I get the following message "Inserted module 'nfs' ". Since there was no notification during the update/upgrade process, even checked the pacman.log, am I supposed to add it manually in rc.conf as a user module or is it perfectly fine to leave it as it is?
Thanks in advance.

@Trilby
I think you got me all wrong there. My country is usually featured with two mirrors, one being http and the other a ftp one. It is those two that comment out. The rest of the mirrors obviously stay commented
@Terminator
The thing I wonder about is why it inserts itself in the User specified modules  when I am not using nfs. Just because nfs-utils is installed even if it is not set up as far as I have checked? If I needed it, or any other user I would expect the user to add it him/herself instead of this automatized way I guess.
@tomk
Thanks for the link. But, honestly speaking, after reading the information you provided I still don't see a concrete reason of why to avoid ftp mirrors. I must confess that I am trying to figure out if the use of a ftp mirror together with the http one might have lead to the problems I am experiencing these days.
The notification appears just like #5 says.
@falconindy
The only reason for this module to be inserted automatically is to have the nfs-utils installed even if nfs is not set up at this time?

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    root@myhost ]# pacman -Syu (aarnnet repo # hashed)
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    error: failed to synchronize any databases
    [root@myhost ]#
    /etc/pacman.d/mirrorlist
    # Mirror selected during installation
    Server = [url]ftp://mirror.aarnet.edu.au/pub/archlinux/$repo/os/$arc[/url]
    ## Arch Linux repository mirrorlist
    ## Generated on 2011-10-26
    ## Any
    #Server = [url]ftp://mirrors.kernel.org/archlinux/$repo/os/$arch[/url]
    #Server = [url]http://mirrors.kernel.org/archlinux/$repo/os/$arch[/url]
    ## Australia
    #Server = [url]ftp://mirror.aarnet.edu.au/pub/archlinux/$repo/os/$arch[/url]
    #Server = [url]http://mirror.aarnet.edu.au/pub/archlinux/$repo/os/$arch[/url]
    #Server = [url]ftp://ftp.iinet.net.au/pub/archlinux/$repo/os/$arch[/url]
    #Server = [url]http://ftp.iinet.net.au/pub/archlinux/$repo/os/$arch[/url]
    #Server = [url]ftp://mirror.internode.on.net/pub/archlinux/$repo/os/$arch[/url]
    #Server = [url]http://mirror.internode.on.net/pub/archlinux/$repo/os/$arch[/url]
    #Server = [url]ftp://mirror.optus.net/archlinux/$repo/os/$arch[/url]
    #Server = [url]http://mirror.optus.net/archlinux/$repo/os/$arch[/url]
    etc-- etc--- etc
    ## Uzbekistan
    #Server = [url]ftp://mirrors.st.uz/archlinux/$repo/os/$arch[/url]
    #Server = [url]http://mirrors.st.uz/archlinux/$repo/os/$arch[/url]
    /etc/pacman.conf
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    # See the pacman.conf(5) manpage for option and repository directives
    # GENERAL OPTIONS
    [options]
    # The following paths are commented out with their default values listed.
    # If you wish to use different paths, uncomment and update the paths.
    #RootDir = /
    #DBPath = /var/lib/pacman/
    #CacheDir = /var/cache/pacman/pkg/
    #LogFile = /var/log/pacman.log
    HoldPkg = pacman glibc
    # If upgrades are available for these packages they will be asked for first
    SyncFirst = pacman
    #XferCommand = /usr/bin/wget --passive-ftp -c -O %o %u
    #XferCommand = /usr/bin/curl -C - -f %u > %o
    #CleanMethod = KeepInstalled
    Architecture = auto
    # Pacman won't upgrade packages listed in IgnorePkg and members of IgnoreGroup
    #IgnorePkg =
    #IgnoreGroup =
    #NoUpgrade =
    #NoExtract =
    # Misc options (all disabled by default)
    #UseSyslog
    #ShowSize
    #UseDelta
    #TotalDownload
    #CheckSpace
    # REPOSITORIES
    # - can be defined here or included from another file
    # - pacman will search repositories in the order defined here
    # - local/custom mirrors can be added here or in separate files
    # - repositories listed first will take precedence when packages
    # have identical names, regardless of version number
    # - URLs will have $repo replaced by the name of the current repo
    # - URLs will have $arch replaced by the name of the architecture
    # Repository entries are of the format:
    # [repo-name]
    # Server = ServerName
    # Include = IncludePath
    # The header [repo-name] is crucial - it must be present and
    # uncommented to enable the repo.
    # The testing repositories are disabled by default. To enable, uncomment the
    # repo name header and Include lines. You can add preferred servers immediately
    # after the header, and they will be used before the default mirrors.
    #[testing]
    #Include = /etc/pacman.d/mirrorlist
    [core]
    Include = /etc/pacman.d/mirrorlist
    [extra]
    Include = /etc/pacman.d/mirrorlist
    #[community-testing]
    #Include = /etc/pacman.d/mirrorlist
    [community]
    Include = /etc/pacman.d/mirrorlist
    # An example of a custom package repository. See the pacman manpage for
    # tips on creating your own repositories.
    #[custom]
    #Server = file:///home/custompkgs
    Moderator:  Added code blocks.  This is what had been requested, edit this post to see how it is done -- ewaller
    Last edited by elzorro (2012-01-09 12:02:54)

    FYI karol
    Voila!
    Regardz
    El Zorro
    karol wrote:elzorro, please post the whole mirrorlist using [ code ] tags.
    # Mirror selected during installation
    Server = ftp://mirror.aarnet.edu.au/pub/archlinux/$repo/os/$arch
    ## Arch Linux repository mirrorlist
    ## Generated on 2011-10-26
    ## Any
    #Server = ftp://mirrors.kernel.org/archlinux/$repo/os/$arch
    #Server = http://mirrors.kernel.org/archlinux/$repo/os/$arch
    ## Australia
    Server = ftp://mirror.aarnet.edu.au/pub/archlinux/$repo/os/$arch
    Server = http://mirror.aarnet.edu.au/pub/archlinux/$repo/os/$arch
    Server = ftp://ftp.iinet.net.au/pub/archlinux/$repo/os/$arch
    Server = http://ftp.iinet.net.au/pub/archlinux/$repo/os/$arch
    Server = ftp://mirror.internode.on.net/pub/archlinux/$repo/os/$arch
    Server = http://mirror.internode.on.net/pub/archlinux/$repo/os/$arch
    Server = ftp://mirror.optus.net/archlinux/$repo/os/$arch
    Server = http://mirror.optus.net/archlinux/$repo/os/$arch
    ## Belarus
    #Server = ftp://ftp.byfly.by/pub/archlinux/$repo/os/$arch
    #Server = http://ftp.byfly.by/pub/archlinux/$repo/os/$arch
    #Server = ftp://mirror.datacenter.by/pub/archlinux/$repo/os/$arch
    #Server = http://mirror.datacenter.by/pub/archlinux/$repo/os/$arch
    ## Belgium
    #Server = ftp://archlinux.mirror.kangaroot.net/pub/archlinux/$repo/os/$arch
    #Server = http://archlinux.mirror.kangaroot.net/$repo/os/$arch
    ## Brazil
    #Server = ftp://ftp.bitwave.com.br/archlinux/$repo/os/$arch
    #Server = http://www.bitwave.com.br/downloads/archlinux/$repo/os/$arch
    #Server = ftp://archlinux.c3sl.ufpr.br/archlinux/$repo/os/$arch
    #Server = http://archlinux.c3sl.ufpr.br/$repo/os/$arch
    #Server = ftp://ftp.las.ic.unicamp.br/pub/archlinux/$repo/os/$arch
    #Server = http://www.las.ic.unicamp.br/pub/archlinux/$repo/os/$arch
    #Server = ftp://www2.itti.ifce.edu.br/archlinux/$repo/os/$arch
    #Server = http://www2.itti.ifce.edu.br/archlinux/$repo/os/$arch
    ## Canada
    #Server = ftp://mirror.csclub.uwaterloo.ca/archlinux/$repo/os/$arch
    #Server = http://mirror.csclub.uwaterloo.ca/archlinux/$repo/os/$arch
    #Server = ftp://mirror.its.dal.ca/archlinux/$repo/os/$arch
    #Server = http://mirror.its.dal.ca/archlinux/$repo/os/$arch
    #Server = ftp://less.cogeco.net/pub/archlinux/$repo/os/$arch
    #Server = http://less.cogeco.net/pub/archlinux/$repo/os/$arch
    ## Chile
    #Server = ftp://mirror.archlinux.cl/$repo/os/$arch
    #Server = ftp://mirror.netglobalis.net/archlinux/$repo/os/$arch
    #Server = http://mirror.netglobalis.net/archlinux/$repo/os/$arch
    ## China
    #Server = http://mirrors.163.com/archlinux/$repo/os/$arch
    #Server = http://mirror.bjtu.edu.cn/archlinux/$repo/os/$arch
    #Server = http://mirror6.bjtu.edu.cn/archlinux/$repo/os/$arch
    #Server = ftp://mirror.lzu.edu.cn/archlinux/$repo/os/$arch
    #Server = http://mirror.lzu.edu.cn/archlinux/$repo/os/$arch
    #Server = ftp://mirrors.stuhome.net/archlinux/$repo/os/$arch
    #Server = http://mirrors.stuhome.net/archlinux/$repo/os/$arch
    ## Colombia
    #Server = http://www.laqee.unal.edu.co/archlinux/$repo/os/$arch
    ## Czech Republic
    #Server = ftp://archlinux.mirror.dkm.cz/pub/archlinux/$repo/os/$arch
    #Server = http://archlinux.mirror.dkm.cz/pub/archlinux/$repo/os/$arch
    #Server = http://mirror.vpsfree.cz/archlinux/$repo/os/$arch
    ## Denmark
    #Server = ftp://mirrors.dotsrc.org/archlinux/$repo/os/$arch
    #Server = http://mirrors.dotsrc.org/archlinux/$repo/os/$arch
    #Server = ftp://ftp.klid.dk/archlinux/$repo/os/$arch
    ## Estonia
    #Server = ftp://ftp.eenet.ee/pub/archlinux/$repo/os/$arch
    #Server = http://ftp.eenet.ee/pub/archlinux/$repo/os/$arch
    ## Finland
    #Server = ftp://mirror.academica.fi/archlinux/$repo/os/$arch
    #Server = http://mirror.academica.fi/archlinux/$repo/os/$arch
    #Server = ftp://mirror.archlinux.fi/archlinux/$repo/os/$arch
    #Server = http://mirror.archlinux.fi/archlinux/$repo/os/$arch
    ## France
    #Server = http://mir.archlinux.fr/$repo/os/$arch
    #Server = ftp://distrib-coffee.ipsl.jussieu.fr/pub/linux/archlinux/$repo/os/$arch
    #Server = http://distrib-coffee.ipsl.jussieu.fr/pub/linux/archlinux/$repo/os/$arch
    #Server = ftp://mir1.archlinux.fr/archlinux/$repo/os/$arch
    #Server = http://mir1.archlinux.fr/archlinux/$repo/os/$arch
    #Server = http://miroir.ezvan.fr/archlinux/$repo/os/$arch
    #Server = ftp://archlinux.mirrors.ovh.net/archlinux/$repo/os/$arch
    #Server = http://archlinux.mirrors.ovh.net/archlinux/$repo/os/$arch
    #Server = http://archlinux.polymorf.fr/$repo/os/$arch
    ## Germany
    #Server = http://archlinux.limun.org/$repo/os/$arch
    #Server = ftp://artfiles.org/archlinux.org/$repo/os/$arch
    #Server = http://artfiles.org/archlinux.org/$repo/os/$arch
    #Server = http://mirror.devnu11.net/archlinux/$repo/os/$arch
    #Server = ftp://ftp5.gwdg.de/pub/linux/archlinux/$repo/os/$arch
    #Server = http://ftp5.gwdg.de/pub/linux/archlinux/$repo/os/$arch
    #Server = ftp://ftp.halifax.rwth-aachen.de/archlinux/$repo/os/$arch
    #Server = http://ftp.halifax.rwth-aachen.de/archlinux/$repo/os/$arch
    #Server = ftp://ftp.hosteurope.de/mirror/ftp.archlinux.org/$repo/os/$arch
    #Server = http://ftp.hosteurope.de/mirror/ftp.archlinux.org/$repo/os/$arch
    #Server = ftp://ftp-stud.hs-esslingen.de/pub/Mirrors/archlinux/$repo/os/$arch
    #Server = http://ftp-stud.hs-esslingen.de/pub/Mirrors/archlinux/$repo/os/$arch
    #Server = ftp://mirror.de.leaseweb.net/archlinux/$repo/os/$arch
    #Server = http://mirror.de.leaseweb.net/archlinux/$repo/os/$arch
    #Server = ftp://mirrors.n-ix.net/archlinux/$repo/os/$arch
    #Server = http://mirrors.n-ix.net/archlinux/$repo/os/$arch
    #Server = ftp://mirror.selfnet.de/archlinux/$repo/os/$arch
    #Server = http://mirror.selfnet.de/archlinux/$repo/os/$arch
    #Server = ftp://ftp.spline.inf.fu-berlin.de/mirrors/archlinux/$repo/os/$arch
    #Server = http://ftp.spline.inf.fu-berlin.de/mirrors/archlinux/$repo/os/$arch
    #Server = ftp://ftp.tu-chemnitz.de/pub/linux/archlinux/$repo/os/$arch
    #Server = http://ftp.tu-chemnitz.de/pub/linux/archlinux/$repo/os/$arch
    #Server = ftp://arch.mirrors.tuxdroid.org/$repo/os/$arch
    #Server = http://arch.mirrors.tuxdroid.org/$repo/os/$arch
    #Server = ftp://ftp.uni-kl.de/pub/linux/archlinux/$repo/os/$arch
    #Server = http://ftp.uni-kl.de/pub/linux/archlinux/$repo/os/$arch
    ## Great Britain
    #Server = ftp://mirror.lividpenguin.com/pub/archlinux/$repo/os/$arch
    #Server = http://mirror.lividpenguin.com/pub/archlinux/$repo/os/$arch
    #Server = ftp://mirror.cinosure.com/archlinux/$repo/os/$arch
    #Server = http://mirror.cinosure.com/archlinux/$repo/os/$arch
    #Server = ftp://mirrors.uk2.net/pub/archlinux/$repo/os/$arch
    #Server = http://archlinux.mirrors.uk2.net/$repo/os/$arch
    ## Greece
    #Server = ftp://ftp.cc.uoc.gr/mirrors/linux/archlinux/$repo/os/$arch
    #Server = http://ftp.cc.uoc.gr/mirrors/linux/archlinux/$repo/os/$arch
    #Server = ftp://ftp.ntua.gr/pub/linux/archlinux/$repo/os/$arch
    #Server = http://ftp.ntua.gr/pub/linux/archlinux/$repo/os/$arch
    #Server = ftp://ftp.otenet.gr/pub/linux/archlinux/$repo/os/$arch
    #Server = http://ftp.otenet.gr/linux/archlinux/$repo/os/$arch
    ## Hungary
    #Server = ftp://ftp.mfa.kfki.hu/pub/mirrors/ftp.archlinux.org/$repo/os/$arch
    ## India
    #Server = ftp://mirror.cse.iitk.ac.in/archlinux/$repo/os/$arch
    #Server = http://mirror.cse.iitk.ac.in/archlinux/$repo/os/$arch
    ## Ireland
    #Server = ftp://ftp.heanet.ie/mirrors/ftp.archlinux.org/$repo/os/$arch
    #Server = http://ftp.heanet.ie/mirrors/ftp.archlinux.org/$repo/os/$arch
    ## Israel
    #Server = ftp://mirror.isoc.org.il/pub/archlinux/$repo/os/$arch
    #Server = http://mirror.isoc.org.il/pub/archlinux/$repo/os/$arch
    ## Italy
    #Server = http://mirrors.prometeus.net/archlinux/$repo/os/$arch
    ## Japan
    #Server = ftp://ftp.jaist.ac.jp/pub/Linux/ArchLinux/$repo/os/$arch
    #Server = http://ftp.jaist.ac.jp/pub/Linux/ArchLinux/$repo/os/$arch
    #Server = ftp://ftp.yz.yamagata-u.ac.jp/pub/linux/archlinux/$repo/os/$arch
    #Server = http://ftp.yz.yamagata-u.ac.jp/pub/linux/archlinux/$repo/os/$arch
    ## Kazakhstan
    #Server = ftp://archlinux.kz/$repo/os/$arch
    #Server = http://archlinux.kz/$repo/os/$arch
    ## Korea
    #Server = ftp://mirror.yongbok.net/archlinux/$repo/os/$arch
    #Server = http://mirror.yongbok.net/archlinux/$repo/os/$arch
    ## Latvia
    #Server = http://archlinux.goodsoft.lv/$repo/os/$arch
    ## Luxembourg
    #Server = ftp://archlinux.mirror.root.lu/archlinux/$repo/os/$arch
    #Server = http://archlinux.mirror.root.lu/$repo/os/$arch
    ## Macedonia
    #Server = http://arch.linux.net.mk/archlinux/$repo/os/$arch
    ## Moldova
    #Server = ftp://mirror.ihost.md/archlinux/$repo/os/$arch
    #Server = http://mirror.ihost.md/archlinux/$repo/os/$arch
    ## Netherlands
    #Server = ftp://mirror.nl.leaseweb.net/archlinux/$repo/os/$arch
    #Server = http://mirror.nl.leaseweb.net/archlinux/$repo/os/$arch
    #Server = ftp://ftp.nluug.nl/pub/os/Linux/distr/archlinux/$repo/os/$arch
    #Server = http://ftp.nluug.nl/pub/os/Linux/distr/archlinux/$repo/os/$arch
    ## New Caledonia
    #Server = ftp://archlinux.nautile.nc/archlinux/$repo/os/$arch
    #Server = http://archlinux.nautile.nc/archlinux/$repo/os/$arch
    ## Norway
    #Server = ftp://mirror.archlinux.no/$repo/os/$arch
    #Server = http://mirror.archlinux.no/$repo/os/$arch
    #Server = ftp://mirror.pvv.ntnu.no/pub/archlinux/$repo/os/$arch
    ## Poland
    #Server = ftp://ftp.piotrkosoft.net/pub/mirrors/ftp.archlinux.org/$repo/os/$arch
    #Server = http://piotrkosoft.net/pub/mirrors/ftp.archlinux.org/$repo/os/$arch
    ## Portugal
    #Server = ftp://ftp.rnl.ist.utl.pt/pub/archlinux/$repo/os/$arch
    #Server = http://ftp.rnl.ist.utl.pt/pub/archlinux/$repo/os/$arch
    ## Romania
    #Server = ftp://mirrors.adnettelecom.ro/archlinux/$repo/os/$arch
    #Server = http://mirrors.adnettelecom.ro/archlinux/$repo/os/$arch
    #Server = ftp://mirror.archlinux.ro/archlinux/$repo/os/$arch
    #Server = http://mirror.archlinux.ro/archlinux/$repo/os/$arch
    #Server = ftp://ftp.roedu.net/mirrors/archlinux.org/$repo/os/$arch
    #Server = http://ftp.roedu.net/mirrors/archlinux.org/$repo/os/$arch
    ## Russia
    #Server = ftp://mirror.yandex.ru/archlinux/$repo/os/$arch
    #Server = http://mirror.yandex.ru/archlinux/$repo/os/$arch
    ## Singapore
    #Server = ftp://ftp.oss.eznetsols.org/linux/archlinux/$repo/os/$arch
    ## South Korea
    #Server = ftp://ftp.kaist.ac.kr/ArchLinux/$repo/os/$arch
    #Server = http://ftp.kaist.ac.kr/ArchLinux/$repo/os/$arch
    ## Spain
    #Server = ftp://ftp.rediris.es/mirror/archlinux/$repo/os/$arch
    #Server = http://sunsite.rediris.es/mirror/archlinux/$repo/os/$arch
    ## Sweden
    #Server = ftp://ftp.ds.hj.se/pub/os/linux/archlinux/$repo/os/$arch
    #Server = http://ftp.ds.hj.se/pub/os/linux/archlinux/$repo/os/$arch
    #Server = ftp://ftp.lysator.liu.se/pub/archlinux/$repo/os/$arch
    #Server = http://ftp.lysator.liu.se/pub/archlinux/$repo/os/$arch
    #Server = ftp://ftp.portlane.com/pub/os/linux/archlinux/$repo/os/$arch
    #Server = http://ftp.portlane.com/pub/os/linux/archlinux/$repo/os/$arch
    ## Switzerland
    #Server = ftp://archlinux.puzzle.ch/$repo/os/$arch
    #Server = http://archlinux.puzzle.ch/$repo/os/$arch
    ## Taiwan
    #Server = ftp://linux.cs.nctu.edu.tw/archlinux/$repo/os/$arch
    #Server = http://linux.cs.nctu.edu.tw/archlinux/$repo/os/$arch
    #Server = ftp://shadow.ind.ntou.edu.tw/archlinux/$repo/os/$arch
    #Server = http://shadow.ind.ntou.edu.tw/archlinux/$repo/os/$arch
    #Server = ftp://ftp.tku.edu.tw/Linux/ArchLinux/$repo/os/$arch
    #Server = http://ftp.tku.edu.tw/Linux/ArchLinux/$repo/os/$arch
    ## Turkey
    #Server = ftp://ftp.linux.org.tr/archlinux/$repo/os/$arch
    #Server = http://ftp.linux.org.tr/archlinux/$repo/os/$arch
    ## Ukraine
    #Server = ftp://ftp.linux.kiev.ua/pub/Linux/ArchLinux/$repo/os/$arch
    #Server = http://ftp.linux.kiev.ua/pub/Linux/ArchLinux/$repo/os/$arch
    #Server = ftp://mirrors.mithril.org.ua/linux/archlinux/$repo/os/$arch
    #Server = http://mirrors.mithril.org.ua/linux/archlinux/$repo/os/$arch
    ## United States
    #Server = ftp://archlinux.supsec.org/pub/linux/arch/$repo/os/$arch
    #Server = http://archlinux.supsec.org/$repo/os/$arch
    #Server = ftp://cake.lib.fit.edu/archlinux/$repo/os/$arch
    #Server = http://cake.lib.fit.edu/archlinux/$repo/os/$arch
    #Server = http://mirrors.cat.pdx.edu/archlinux/$repo/os/$arch
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