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360alaska

Using SCSI2SD v5.5 in a Powerbook

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So here’s a thought,

 

During my work on my Powerbook 100 battery, I was trying to find a suitable hard drive replacement as the Conner 20mb hard drive was clearly on last legs. I first looked to Inertial Computing who did not have any SCSI2SdD Powerbook variations in stock. Second, I looked to Codesrc who apparently does not ship to the US. Lastly, I looked to and ordered from ARTMIX who sells a clone of the SCSI2SD. I ordered it on August 6th and while it does appear they shipped it, it seems to have been lost in the mail. So I continued to limp along the 20mb hard drive which seems to do okay when it works. If you look on Ebay, people are selling 2.5” 50-pin scsi drives for 40,60,80, even 100$. This is crazy! So I think I have a solution, I was browsing Inertial Computing’s website and SCSI2SD v5.5 aka the DB25 version seem to be aplenty.

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The SCSI2SD v5.5 is the smallest SCSI model yet and fits perfectly within the size limitations of the 2.5 hard drive, so I have designed an adapter. While I can claim success of the concept, unfortunately I reversed the DB25 connector on the PCB so I have a revision on order. But hey it works!

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I successfully, installed and booted to 7.1, as well as did a quick benchmark:

 

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Inertial should sell these on their site.... hint hint. The 160MB Quantum GoDrive in my 180c bit the dust, so this adapter is well timed. If clearance is a problem, one can remove the plastic casing.

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10 hours ago, 360alaska said:

LOL yeah, those powerbook scsi2sd cards have become unobtainium.

Dang. I used to order them directly from the guy in Australia, no problem. but. COVID....

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With this adapter I’m not sure there would be a need for the special PowerBook version of the SCSI2SD. Are there any height considerations for later SSCI PowerBooks? 500 series?

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If you take the scsi2sd out of it’s case, it and the adapter should fit in any scsi powerbook.

Edited by 360alaska

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On 9/9/2020 at 4:10 AM, 360alaska said:

LOL yeah, those powerbook scsi2sd cards have become unobtainium.

Unobtanium indeed. Been looking for one for my PB 180c :/ Wish I knew if/when they'd be available again and whether on not to keep waiting or get creative like you have. My inquiries to @inertialcomputing have thus far gone unanswered.

 

What are the overall dims of your arrangement? 

Edited by sutekh

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It will be smaller than a hard drive, I can probably design and 3d print a mounting solution. Anyhow, the new board comes tomorrow so expect an update then.

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So the original 40mb hard drive is 101.7 x 70.1 x 18 and the SCSI2SD and adapter is 99.5 x 55.1 x 17.1 (with the cover on the scsi2sd).

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I have also designed a caddy of sorts with the correct mounting holes:

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Man, that looks great. Inertial should sell these instead of the 2.5 inch SCSI2SD. :D

If not I'm sure a bunch of folks here are interested if you make a few.

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On 9/14/2020 at 10:48 AM, sutekh said:

Unobtanium indeed. Been looking for one for my PB 180c :/ Wish I knew if/when they'd be available again and whether on not to keep waiting or get creative like you have. My inquiries to @inertialcomputing have thus far gone unanswered. 

Apologies, It's been a long month for us, with fallout from local wildfire, and an overall lack of time to do anything but fulfill orders. New employee starts Monday, which will shed an immense burden. We're have developed a SCSI2SD V5.5-based/derived solution, to replace the legacy V5.0 Powerbook Edition. Stay tuned.

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16 hours ago, inertialcomputing said:

Apologies, It's been a long month for us, with fallout from local wildfire, and an overall lack of time to do anything but fulfill orders. New employee starts Monday, which will shed an immense burden. We're have developed a SCSI2SD V5.5-based/derived solution, to replace the legacy V5.0 Powerbook Edition. Stay tuned.

 

Thanks for the update (I was just about to pull the trigger on an ARTMix) and sorry for piling on. Happy to keep waiting knowing something is in the works.

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On 9/19/2020 at 12:27 PM, sutekh said:

 

Thanks for the update (I was just about to pull the trigger on an ARTMix) and sorry for piling on. Happy to keep waiting knowing something is in the works.

Please don't purchase SCSI2SD clones from Artmix; They are non GPL compliant, unlicensed clones of SCSI2SD, and Artmix is and has been distributing modified firmware without providing their changes. They've been approached multiple times, and all they are willing to provide is the compiled, binary blob for the board, which in no way makes them compliant with the GPL. In response, they claim _we_ are violating the GPL, which is 100% wrong. Buyer beware. Don't believe me? Ask Michael McMaster, the creator.

 

Regardless of your opinions of Artmix, below is the prototype interposer we developed to allow for the V5.5 PCB to be used as a 2.5" SCSI drive. With the male DB25 port installed as seen below, you can use the SCSI2SD both externally and internally, which has the potential to make provisioning significantly more straightforward.

 

We sent one of these PCBs to @360alaska, and he performed his own transplant of a stock V5.5 (external) to this PCB. If he is inclined to share his photos, we'd be more than fine with that.

 

SCSI2SD-V5.5-2.5-inch-2.jpg?v-cache=1601

Edited by inertialcomputing

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Very nice! Good to know about Artmix's shenanigans. Long time OSS / GPL proponent, so they'll get none of my business. Only thing I like about their unit, however, is the included metal frame with horizontal threaded holes so no 3D printed or other custom mount is necessary.

 

Also, I'm probably missing something obvious, but wouldn't a DB25F make it easier to connect externally? Every DB25 SCSI cable I've ever seen ends in a DB25M unless you're imagining these be installed directly against the Mac sans-cable? 

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13 hours ago, sutekh said:

Also, I'm probably missing something obvious, but wouldn't a DB25F make it easier to connect externally? Every DB25 SCSI cable I've ever seen ends in a DB25M unless you're imagining these be installed directly against the Mac sans-cable? 

In my experience, this is exactly what I did: plug the v.5.5 directly in the Mac and Apple IIGS scsi plug.
Only with Quadra 700, due to the case angles on the back, I couldn't manage to do it without taking the case away, or using a scsi zip drive cable.

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20 hours ago, sutekh said:

Very nice! Good to know about Artmix's shenanigans. Long time OSS / GPL proponent, so they'll get none of my business. Only thing I like about their unit, however, is the included metal frame with horizontal threaded holes so no 3D printed or other custom mount is necessary.

 

Also, I'm probably missing something obvious, but wouldn't a DB25F make it easier to connect externally? Every DB25 SCSI cable I've ever seen ends in a DB25M unless you're imagining these be installed directly against the Mac sans-cable?  

Normally, yes, but V5.5 is a "direct attach" style device, designed such that no cable is needed.

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