Like many folks in here I've been looking at the T20 for a while as a potential replacement for my N36L and N54L. Both done a sterling job for the time I've had them (May 2011 and May 2013 only a PSU gone in one of them in that time!) but given the price on the T20, I think it was rude not to get one really
The N54L ESXI host has:
- 8GB RAM
- 256MB SSD
- 4 x 2TB drives
- Intel PCIE NIC
The N36L Nas4Free host has:
- 8GB RAM
- 4 x 3TB drives
- Intel PCIE NIC
So looking at consolidating these two systems, I have an issue with the drives. Adding a RAID/HBA card in is not an issue but the T20 physically only has room for 4 x 3.5" drives by default.
There's a great thread by Schoondoggy over at Homeservershow (
Here) detailing how to easily add 2 more 3.5" drives with the addition of a dell drive cage but these are around £25 on the bay and still only get me up to 6 drives.
In the same thread, there's a link to another forum where some chap has deconstructed the case and riveted together multiple Dell drive cages to get up to a total of 8 (
Here - pretty nice job if you ask me
). This would be perfect but extends beyond the scope of my DIY abilities by some margin!
Given this, I could either look to buy 4 new drives of larger capacity (4/5TB) or look for another case to transplant the system into.
With hindsight, I should probably just have stuck to the buying new drives option but decided to go for the new case option instead.
I've got a 12u Network comms rack (55cm overall depth) under my stairs that currently has the 2x HP servers along with switch, patch panel and other bits:
So I decided to look for a Short depth (~40cm) 3U or 4U case with enough space for the 8 3.5" drives along with the SSD.
There were plenty of options but in the end I decided upon the Logic Case 3U SC-34390 (
Manufacturer Info Here). Basic looking thing (I'm sure some would say cheap!) but seems to be up to the task. Claims space for
up to (important - see pics below!) 8 x 3.5" drives and 3 x 5.25" drives (optional 3 x 5.25" bay to 5 x 3.5" and 120mm fan mount available
here) so a potential 13 x 3.5" drives!
Mine came and had 2 x 80mm 4 pin Molex fans at the front and 2 x 60mm 4 pin Molex fans in the rear.
(Just as a point of note, the pics from now on are from various date/time stages so not true chronological pictorial by any means!)
So, first point, the two hard drive cages at the front are very deep:
They're screwed to the bottom of the case so you'll need a Philips screw driver with a long shaft (giggidy)
Second point (and something I should have checked before ordering the case), there's no way you'll ever be able to use all 8 of the front 3.5" bays with a full size MATX motherboard. I've not actually got to the point of fitting the drives yet but there's a potential chance the second bay up may be unusable too (hope this isn't the case!
) A short width MATX/Mini ITX board will be fine I'm sure but no chance with this Dell T20 motherboard:
Third point, given the motherboard / psu slot placement, the 4 pin 12V connector is way too short to reach back over to the other side of the board:
One 45CM extension cable routed under the motherboard later and we're good:
Fourth point, the Power button cable, Front IO panel and system fan header connectors are all Dell proprietary. This is the thing that's proven to be the biggest head ache so far!
With a quick bit of tinkering with a screw driver, I found the two far right pins to be power switch (black and yellow on the original connector)
It's alive!
But wait, it's not that easy
All three of the afore mentioned connectors have detectors so if they're not connected or failed, you get this lovely error which you have to hit F1 on every boot to get past. Given this is going under the stairs and I want to be able to deal with remotely, this isn't good
The obvious answer here for the Power and Front IO at least, was to simply take the existing cable and fit them into the case but that would mean more modding so decided to look into alternatives first and use the retro fitting as a last resort.
Fan First
As utter luck would have it we were chucking out some old Dell Optiplex SX280 at work which I'd randomly stripped a month or two ago. The hoarder in me couldn't bring myself to bin the 60MMx38MM fans that were in the things so I held on to them. Wonderfully, they're an exact fit with the same header connector as the old 92MM fan that came with the server originally:
I replaced one of the rear 60MM fans with this one and thankfully it works and the error is now gone!
One down, two to go!
Power Cable
Now for the more interesting bit - The headers on the motherboard are smaller than your standard motherboard connectors (from Googling I believe they're what's known as 1.27mm Pitch IDC connectors but I'll stand to be corrected). I'd already worked out the power switch pins so from the fact there are 5 in total with 3 left and the LED was incorporated into the switch, it made sense that two of the pins are for the Power LED, 1 must be the detect pin.
After some trial and error I managed to work out the pin outs for the functions and suppress the error message by shorting the detect pin into the LED.
I was then stuck with how to create a good connection between the socket on the motherboard and the standard case cables. I tried a few different things, the main one being trying to find a converter cable on the bay (I didn't manage to find one so either my Googlefu is weak or I was searching for entirely the wrong thing - for everyone else's sake I hope a simple converter cable exists!)
I then stumbled upon an old 40 Pin to 44 Pin 3.5" IDE to 2.5" IDE converter in my box of random PC bits, as luck would have it, the 2.5" IDE end is exactly the same size as the motherboard headers and the 3.5" end is the same pitch as a standard motherboard header. Too long obviously, but at least a glimmer of hope
I then took to it with a pair of pliers and chopped one end down to a 3 x 2 block. Made sure I sanded the smaller end down to make sure it was reasonably square. I also superglued the opposite end to make sure the wires didn't come away from the connector.
To save having to connect the detect wire at the top end, I stripped back the two relevant wires and gave them a quick blob of solder and wrapped in electrical tape. I then desoldered some of the pins from another old 2.5" to 3.5" IDE board and stuck them in so the case headers could attach.
Connected and even without the LED, no more Power button error.
(Ignore the Molex connector the other end is a Six pin 3x2 block.)
Only downside to this is that the LED in the original switch is two colour, it flashes orange to indicate any diagnostic errors - with this change there's no indicator on diagnostic problems although for now I'm willing to accept that.
Front IO cable
Slightly more convoluted but same process as above
This time making a 10 x 2 cable and again shorting the detect wires together. On the front IO, the detect is actually two distinct pins.
Testing with Front USB and LED connected:
It's alive!
So at this point I'm happy stuff is connected and the error messages aren't occurring anymore. When I get chance I'm going to be looking at transferring RAM / Drives and Network cards over and seeing how I get on with the actual fitting of stuff into the case.
For any other brave (read - stupid
) folks like me who want to case transplant, the pinout for the motherboard headers is as per below:
I completely forgot which way round the +/- is wired for the LED so omitted from the Diagram and I've not bothered working out the headphone/mic jacks as I have no intention of ever using them but they should be simple enough to figure out
I hope this helps some folks as it's certainly been annoying me for a week or two