The bottom line with any high performance storage solution is that
the number of drive spindles in play is often more important than almost
any other factor, assuming that everything else is based on reasonably
modern technology. When you combine the higher level of performance with
the greater flexibility for online RAID capacity expansion & online
RAID level migration, the additional cost of the extra drive bays
always looks like a bargain instead of conspicuous consumption.High
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tiles. This is the reason more and more people are opting for NAS
systems with at least four bays, even though they may not need all that
capacity now. What initially looks like overkill in a NAS system might
just be the very thing that saves the day some years down the road.
We've
all got data that we can't live without, the question is, how long do
you want to be without it? Very few people or businesses are going to
want to live without their important information for any length of time,
and a RAID configuration that includes some redundancy is undoubtedly
called for. With multiple SATA drives installed, you can have: RAID 0
(Disk Striping), RAID 1 (Disk Mirroring), RAID 5 (Block-level striping
with distributed parity), RAID 6 (Block-level striping with redundant
distributed parity), and RAID 10 (Striped array whose segments are RAID 1
arrays). The most popular choice is usually RAID 5 because it offers
the highest capacity with built-in redundancy. RAID 6 offers additional
redundancy, allowing for continued operation even with two simultaneous
drive failures. RAID 6 is very popular for larger NAS units and
mission-critical data stores, because if one individual drive fails in a
RAID 5 implementation, the array instantly starts operating as a RAID 0
configuration, which has NO redundancy. It stays in that vulnerable
state until the array is rebuilt, which is a slow process that generally
taxes the system and the remaining drives to the max, and can take
several hours to complete.
The EonNAS 1100 is a relatively small
unit, arranged in a 19" rack mount format and fitting in a single, 1U
rack space. This is clearly not going to be a useful format for a large
variety of home settings, but business users will have no problem
integrating it into their systems. The only available model is a
diskless unit, which allows the end user to select the most some
sensible drive combination that's compatible with their storage needs.A
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The size and weight are consistent with similar equipment in a data
center: 43mm (H) x 439mm (W) x 511mm (D), and 7 kg (15 lb) without
drives installed. Each HDD you install will add about 1-1/2 pounds,
depending on your choice of drive. Many users will be looking at 2TB and
3TB drives for a unit like this, and they're heavier than most. There
are no handles on the unit, but there are optional rail kits available
for easy and secure mounting in a standard 19" rack.
All of the
front panel controls and drive bays are accessible from the front of the
unit; there is no access door or other shield to contend with. In a
device as small as this,One of the most durable and attractive styles of
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there really isn't room for a display on the front, just a few push
buttons and indicator lights. The four drive bays span the entire width
of the unit, and take up at least two thirds of the height, as well. On
the far left side of the front panel are the ON/OFF button, a warning
indicator, and then two LEDs for showing the status of the GbE network
connections. They glow steady during idle conditions, and blink when
data is being transmitted through the ports. There are ventilation holes
in both the drive trays and across a good portion of the upper front
panel. There are no ventilation holes on the sides, top, or bottom of
the EonNAS 1100 chassis. All the cooling air enters at the front of the
unit and is exhausted out the rear by three 40mm fans - one in the PSU
and two controlled by the NAS. There are no filters on any of the air
intakes, presumably because the air in most data centers is cleaner than
in your home. No cat hair, for one thing, but I have seen some dust
bunnies.....
With the unit safely turned off, it's OK to remove
one or more drives and they all slide out the front like this. Each tray
holds one individual drive in the EonNAS 1100, and the tray is a common
part across the product line. Inserting and removing the drive trays
was smooth and positive, both with HDDs mounted in the trays and
without. There are individual locking devices on each of the latches,
and no keys are required to operate them, but you will need a small
screwdriver or a similar tool. My advice is to use the locks and think
twice before unlatching any drive bay. Trust me when I say that you do
not want to start accidentally pulling drives out. The drive bays are
not marked on the front bezel, the individual drive trays are not
marked, and you can mix and match them all you want, until you build a
drive array and then you had better remember which one goes where. I
recommend making your own labels or marking the trays with a Sharpie as
soon as you start installing drives into the unit; if you mix them up
the NAS might not recognize the array, and you could end up destroying
data. In the Hardware manual, Infortrend indicates that the far left
hand bay is considered Drive Slot 1. There is an exception to this, and
Infortrend calls it "Disk Roaming". If you physically migrate your data
from one NAS system to another, you don't have to retain the existing
order of the drives in the new chassis. I don't know if this works when
you're just dealing with the original chassis. The latches acted like a
locking device and a lever; once the trays reached the end of their
travel, swinging the latch levers the tray firmly into place. It's a
sturdy, well designed system for getting the drives in and out. Not that
you want to take them out very often, maybe just for spring cleaning
once a year!
Around the back of the EonNAS 1100, you can see all
of the hardwired I/O points. Starting at the far left is a video
connectors for VGA. This is not used during normal operation, only in
factory maintenance mode, which is not accessible by the user. Directly
to the right is one of the 40mm smart fans, followed by one of the
captive screws for keeping the top panel locked in place. Next up are a
pair of 1000BASE-T Ethernet jacks, four USB 2.0 jacks, and a single
eSATA connector. Further to the right are another 40mm fan opening,The howo truck
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integrated 250W power supply, with its own fan and IEC receptacle. There
is no separate power switch on the rear panel, only the ON/OFF button
on the front. Since this is strictly a business device, there's no spot
for a Kensington lock hole. In order to keep things cool when needed and
quiet the rest of the time, the fan speed is modulated. I haven't paid
much attention to fan noise in most of the smaller NAS models I've
reviewed, as it was never really noticeable during my daily use. The
EonNAS 1100 was like the other rackmount devices I've tested. None were
as quiet as the NAS units intended for domestic use, and the fan noise
stood out against the background noise of my study, above the noise of
two PCs operating in the same room. The main problem is that the form
factor only allows very small (40mm) fans to be used, and small fans
that can move a decent amount of air are always going to be noisier than
a larger fan with the same CFM rating.
The far right side of
the front panel has an external USB 2.0 jack and a dedicated push button
control for initiating a quick backup sequence. There's a small
bi-color LED in the center of the button that provides status updates
during one-touch backup activity. Green is good,Find detailed product
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and other products. amber is bad. Details for this function are
configured in the device software. The backup operation can work either
way, backing up from the USB device to the NAS, or from the NAS to the
USB device. This image also shows the two LED indicators that are
present on each of the four drive trays. They're actually acrylic light
pipes that snake their way back to LEDs on the backplane PC board. The
lower LED is steady green when there's a working drive in the bay; it
turns red if there's a problem with the drive. The upper LED blinks blue
when there is drive activity occurring in that bay.
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