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Date:      Tue, 3 May 2011 23:41:09 +0930
From:      "Daniel O'Connor" <doconnor@gsoft.com.au>
To:        Jeremy Chadwick <freebsd@jdc.parodius.com>
Cc:        freebsd-stable List <freebsd-stable@freebsd.org>
Subject:   Re: ZFS vs OSX Time Machine
Message-ID:  <6B48340C-9A34-41BC-A332-4D0D703E660F@gsoft.com.au>
In-Reply-To: <20110429010829.GA36744@icarus.home.lan>
References:  <537A8F4F-A302-40F9-92DF-403388D99B4B@gsoft.com.au> <20110428195601.GA31807@icarus.home.lan> <AF725CFF-86A4-4D65-A26E-496F6B9BD33E@gsoft.com.au> <20110429010829.GA36744@icarus.home.lan>

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On 29/04/2011, at 10:38, Jeremy Chadwick wrote:
>> The OSX box is connected via an Airport Express (11n).
>=20
> Can you connect something to it via Ethernet and attempt an FTP =
transfer
> (both PUT (store on server) and GET (retrieve from server)) from a
> client on the wired network?  Make sure whatever you're PUT'ing and
> GET'ing are using the ZFS filesystem.  Don't forget "binary" mode too.

I tried dd'ing /dev/zero over SMB and got 40MB/sec (although I'm not =
using AIO yet..)

FTP'ing a 300 MB file averages 60-70MB/sec (the speed of my laptop HD)

ttcp between the hosts hits wire speed (100MB/sec)

>> OK. I don't think TM can use CIFS, I will try ISCSI as someone else =
suggested, perhaps it will help.
>=20
> Be aware there are all sorts of caveats/complexities with iSCSI on
> FreeBSD.  There are past threads on -stable and -fs talking about them
> in great detail.  I personally wouldn't go this route.
>=20
> Why can't OS X use CIFS?  It has the ability to mount a SMB =
filesystem,
> right?  Is there some reason you can't mount that, then tell TM to =
write
> its backups to /mountedcifs?

It looks like I had a dodgy disk which was being tickled by the time =
machine backup (eg dodgy sector where the backup was located) so  I have =
been chasing a ghost :)

However, thanks to everyone for your helpful suggestions!

I still haven't tried iSCSI, given I can't do a bare metal restore from =
it it doesn't seem worth it (also I don't have the time..)

--
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C









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