Kohjinsha SC3 SSD Upgrade

A few years back due to a lucky bit of eBay-ing I managed to acquire a Kohjinsha SC3 for £50 with a 'boot drive error' After much faffing around it turned out the data cable was damaged and therefore the drive was not recognised. A bodge in the form of a bit of card wedged underneath the cable at the right point fixed the issue (as long as you never knocked it too hard) and all was well.

Recently it failed again and being fed up with having to dismantle the unit every few months and fed up with the painfully slow speed of it's Toshiba MK6028GAL 1.8" drive I decided to treat it to a SSD upgrade and replace that pesky cable. I could of bought a Kingspec or Runcore Zif PATA SSD but they seemed either very pricey or not much faster than the drive I was replacing, In the end I threw an 80GB Intel 310 mSATA SSD together with a mSATA to ZIF adapter and a new zif cable (look for Toshiba suitable ones, mine was 15cm long.) The upside is the mSATA drive would ensure the chipset on the SC3 is the limiting factor.

I have taken a few pics to help show how to wrangle one of these apart and a couple of before and after benchmarks using CrystalDiskMark

Update March 2023, Kohjinsha SC3 Drivers:

To make re-installing Windows a bit easier I've brought the links I supplied in the comments up here and fixed any that were broken.

• SC3 Drivers and Software
• SC3 BIOS 1.1H
• The above two files are also available on archive.org
• PenMount Windows Universal Driver V2.4.0.306(WHQL)
• Synaptics Touchpad Drivers
  This is a Softpedia link as Synaptics stopped offering direct drivers late 2017
• RealTek HD Audio 2.79 Drivers
  This is a Softpedia link as Realtek stopped offering direct drivers a while ago

I made a follow up post to this after the Intel mSATA SSD died, check it out here: Kohjinsha SC3 SSD: Not all mSATA's are equal

Benchmarks:

Lets look at the interesting bit first, the original drive as you can see is just painfully slow, 1.8" drives were never really meant for desktop OS use, more iPods and integrated applications. The Intel 310 SSD can achieve much higher reads which shows the limit of the SC3's chipset, we also pretty much hit the write speed limit of the drive so I'm happy overall.

• 

  Original Toshiba MK6028GAL

• 

  New Intel 310 mSATA SSD

The installation:

Taking apart one of these is not difficult just fiddly due to it's size. I ditched the TV module ages ago as it cannot receive UK DVB signals and I never had the GPS or Bluetooth modules so you will find in places that things may look different to yours. Follow the captions in each image paying attention to the green arrows and you should be fine. Click the images for larger sizes.

• 

• The Kohjinsha SC3, the lump on the right side is my USB 3.0 card

• 

• Firstly remove the flap in the center, I just pulled it up with using my finger nail

• 

• Flip the unit over and remove all the screws marked by the arrows, make sure they don't get lost

• 

• Remove the SO-DIMM and Pen (and Battery if you have not done so)

• 

• Flip back the right way and angle the screen as shown, the top plate at the rear will lift off with gentle pressure. If it will not come away make sure all the screws have been removed from underneath shown in the above pictures

• 

• Remove the screen hinge and keyboard screws, make sure the screen does not flop over and break any cables

• 

• Flip up the latches for the keyboard and touchpad zif cables, be gentle with the connectors

• 

• Remove all the screws and connectors shown, the screen connectors in the top right just need a gentle tug upwards. If you have a TV module it's in the top left and has a small zif cable and the two antenna connected to it. You will need to remove these and put the module aside

• 

• The top half pulls away from the lower, start at the back and slowly pry the top from the bottom, if everything is ok it should just come apart. If something feels stuck check all screws are removed. Watch for the little metal bits where the arrows are, they like to fall out when your not looking. Once done remove the three screws show as well

• 

• You should now find the board lifts out, you can remove the ethernet port as I have done if you wish to

• 

• Flip the board over and you can see the drive plus the screw that holds the cage in

• 

• As you can see the dent in the cable around the 94V lettering is why mine stops working, the previous owner had dropped it and managed to damage the cable. You cannot buy these anywhere 😢

• 

• My partially assembled lash up to image the old drive and run the benchmark. I used the same setup with the new drive to re-image and make sure everything worked before putting it back together

• 

• Macrium Reflect is pretty awesome, it's free, it works with modern stuff like USB 3.0 and actually images in decent time unlike some of the alternatives

• 

• New and old side by side, the Intel and adapter are slightly higher at 6.5mm than the 5mm drive but it fitted fine

• 

• New drive held in place underneath with a small sticky pad, also fitted a new longer lead (maybe a bit too long) to replace the old duff one. Needed a small fold when reassembling but nothing that will cause it harm. To reassemble just reverse the disassemble steps

Some eagle eyed viewers may notice my WiFi card is not the stock Via chipset one, I ditched that ages ago in favour of a modern Atheros Azurewave AR58XB72 card that supports WiFi N traffic, I had also used an Intel 3965ABG in this as well so you can pretty much chuck any card at it you want . I did at one point try a combined WiFi and Bluetooth card but that was just hopelessly awful. I posted about it here Combined WiFi/Bluetooth Card and I try not to think about it too often.

If you have other older Kohjinsha units or any other the other smaller netbooks/tablets/pocketables from around this time you should find this setup will work for you, two things to bear in mind are 'will it actually fit inside?' and 'what is the max drive size my BIOS will recognise?' I cheated and bought an 80GB as it was large enough to do the job and small enough to fit under the 128GB BIOS limit which I'm not sure the SC3 can handle.

The big question is was it worth it? Well costwise it was cheaper than buying a PATA SSD (just) and while the unit will always be slow at least it's not like waiting for a ZX Spectrum to load a game anymore just to open notepad. While not in daily use it's sometimes handy to have a proper Windows system for some jobs, this can hide in my bag next to my fancy Ramos i9 tablet for when it needs to show Android how things are done. (Albeit slower than the Ramos could do it if it could)