
Mostly for my backups needs,
I planned a Mini-ITX based home server around the
Chenbro
ES34069 Mini-ITX case which features four hot-swap S-ATA bays. I
wanted a low-consumption motherboard and CPU in there (not only
because of the default 120W power supply) and since low-consumption
mainboards with 4 S-ATA connectors are quite seldom I ve chosen the
not so cheap VIA EPIA SN18000G mainboard with actively cooled 1.8
GHz
VIA C7 processor and a maximum power consumption of less than 30W
(including CPU).
Waiting for delivery
While the Chenbro ES34069 case I ordered at
digitec only needed a
few weeks to deliver, the
VIA EPIA
SN18000G mainboard from Brack took over eleven weeks to deliver,
it finally has been delivered on Wednesday, 5th of November 2008.
I initially ordered the VIA board for CHF 324, now it s at CHF 397
(without rebate even at CHF 439) because Brack seems to have had a lot
of hassles to get some of them at all. Although they usually sell for
the prices at the time they ship the hardware (market price), they
sold it to me at their purchase price, so it became only about CHF 15
more expensive than when I ordered. And since the
RAM price dropped by
one third during those eleven weeks, the whole order became about CHF
25 cheaper, the order was CHF 10 cheaper overall than when ordered.
:-) (Still waiting for the according voucher, though.)
So I ve joined the two main components together, installed
Debian
Lenny on it, crammed four 400
GB Samsung S-ATA disks (formerly in a
TheCus N4100) and the 160
GB 2.5 harddisk from my MicroClient JrSX (I
never really used it in there, it always runs from
CF card) into it,
created a software RAID-5 and now fill it with music, games and
backups.
But not everything was as easy as it sounds above. Although Chenbro
lists the VIA EPIA SN18000G as officially compatible mainboard for the
ES34069, not everything really fitted as expected. So here s my review
of this hardware combination.
Chenbro ES34069
It s really awesome how much features you can stuff in such a small
case. Of course it s not as small as a thin client case or the mCubed
HFX micro case, but it s smaller than most book-size cases like the
ASUS Pundits, just a little bit thicker.
Inside the case (laying on its left side) there are two decks. The
lower deck contains the 3.5 hot-swappable S-ATA harddisk bays, the
internal part of the power supply and the two fans for cooling the
interal power supply components and the disks. The upper deck has
space for the mainboard, a 2.5 harddisk, a slim-line optical drive
slot and all the front-panel stuff (card reader, LEDs,
USB sockets).
Both decks are divided in two section. The front section belongs to
the case itself and the back section containing the mainboard mount
points and the two fans can be easily unplugged after removing four
screws and keeping an eye on the cables from the lower to the upper
deck. That way the mainboard can be mounted very easily. So far a very
convincing design.
To mount the 2.5 harddisk in between the mainboard and the front
panel, it s not really necessary, but convenient to remove the
slim-line optical drive slot, since you then have better access to the
harddisk s IDE socket. To remove the slot, you need to remove the
front cover. That sounded easier than it actually was and I nearly
broke of one its catches. :-/
Although all parts of the case seems to fitting very well together,
the bays for the hot-swappable drives weren t perfect: The drive slots
not always connected even if the latch iss already closed. This was
definitely better with the TheCus N4100. Additionally the bays seem to
be made for slightly larger disks, so mine had play and the screws
pressed the it together and you need to take care that the screws
don t cant.
A big positive point of the case was that there were all necessary
screws included and they were fitting. This was a bigger problem with
the TheCus N4100, since many harddisks ship with their own screws, but
those are seldom the needed flat-head ones.
Even a P-ATA to slim-line optical drive adapter was included, so I
don t need to buy one. (Would have costed CHF 42 at digitec.)
VIA EPIA SN18000G
While it s surely not the most performant board out there, I m quite
satisfied with its performance. I installed
BackupPC 3.1.0 as backup
system on it and it works like a charm. It daily backs up up to 14
machines over ssh tunnels more to come) and is way more performant
than expected. But I probably had very low expectations due to
everyone arguing about the bad performance of the VIA C7. ;-)
Not nice, but known is the problem that most (but not all)
USB
connectors on the SN mainboard have 2.00mm pitch while all the case s
plugs have 2.54mm pitch.
Apropriate adaptors are available from Mini-ITX.com. Thanks to
Akim for this tip!
Power consumption
I hoped to get more details into this posting, e.g. measured power
consumption, etc. But then I recently read in the
c t magazine how
inexact my watt meter (from Brennenstuhl) is, so its values would
probably bring more confusion than help. Additionally I don t feel
like powering down the server just for measurement.
Feedback
I got quite a few mails with hints to further Mini-ITX boards and
TDP
but also with questions about the case. I hope that this
blog post
asnwers some of the questions also for other readers. Thanks to all
who replied to my
initial blog post about my Chenbro/VIA based home server, either
by mail, or comment, or both. :-)
Further plans
For deploying music to my other computers I tried both, mediatomb and
gmediaserver but none really convinced me. Currently I just mount the
media directory using the FUSE and ssh based
sshfs. Not sure if I ll
add NFS due to it s user base syncing hell.
Further plans are an
HTTP proxy with ad filtering and caching
capabilities, it ll be
Privoxy combined with either
Squid or
Polipo. Maybe even a
Tor SOCKS proxy.