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Old 14 November 2018, 14:53   #1
Daedalus
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ISA Slot Hard Drive Mount (A2/3/4000)

Has there been such a thing as a blank ISA card with mounting holes for a hard drive? I'm thinking a blank PCB with a bracket for securing to the case, so that a hard drive can easily be mounted in an A2000 (or an extra drive in a 3000 or 4000). I currently have a hard drive mounted on a GVP Impact HC-8 card, but both the SCSI controller and the RAM aren't being used, so it's a bit of a waste.

If such things aren't (easily) available, would there be any interest in having a batch made? Boards that size aren't particularly cheap, but not crazy money either.
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Old 14 November 2018, 16:15   #2
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I've been looking for something like that for some time without luck.

I have an A2000 with 5.25" + dual 3.5" floppy drives and don't know where to put the MFM HD used by the XT bridgeboard card.

An ISA slot bracket for the HD would be a perfect solution!
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Old 14 November 2018, 18:49   #3
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Something like that should be easy enough to make from a bit of plywood or solid wood surely!
Or print something off with a 3D printer.
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Old 14 November 2018, 19:38   #4
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PCI cards use the same dimensions as ISA cards I think?
Google "pci card hard drive mount".
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Old 14 November 2018, 23:01   #5
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Yeah, it probably would be pretty simple to 3D print or otherwise fashion a bracket, but I thought a properly fitting card would be a neat solution, and could also provide power for the drive in case there aren't any spare PSU connectors.

As for PCI, the rear bracket is the same, but the slot is different and the PCB is on the opposite side. The idea was to mount using both the slot and the bracket at the rear to give solid support, rather than just the bracket.
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Old 15 November 2018, 07:48   #6
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I think it's a good idea. Just make sure you have enough mounting holes to make sure you could use 2.5" and 3.5" harddrives. For Amiga's with a bridgeboard it would be nice to be able to put two harddrives onto one card.
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Old 15 November 2018, 19:50   #7
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Quote:
Originally Posted by Daedalus View Post
As for PCI, the rear bracket is the same, but the slot is different and the PCB is on the opposite side. The idea was to mount using both the slot and the bracket at the rear to give solid support, rather than just the bracket.
Ah of course

I use an eSATA to IDE adapter that just attaches to the bracket. It weighs almost nothing.
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Old 21 November 2018, 13:47   #8
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This would be possible by using somebody like PCBWay.

But instead of populating the board with tracks/pads etc just put in the holes you need for the drive and a pci backplate maybe, ensure the pitch is correct and get it fabbed up! probably cost very little.

I also found a weird ISA board carrier with two 60mm fans on it? something I had lurking for years and I stupidly tossed it in the trash. Wrongly assumed I would never need it, but now would fit nicely in an A1500.

I will put up a picture of it in a bit. I must have had plans at some point as I took a picture of it years ago.
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Old 21 November 2018, 14:35   #9
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This would be possible by using somebody like PCBWay.

But instead of populating the board with tracks/pads etc just put in the holes you need for the drive and a pci backplate maybe, ensure the pitch is correct and get it fabbed up! probably cost very little.
Yep, that was pretty much exactly my plan. Alas, the tracks make no difference to cost on a simple PCB, it's the physical size of the board that determines the cost, not the complexity (up to a point, anyway). I'll get a quote at some point, but I would guess such boards could cost £5 or more each in a small batch. Plus brackets, which aren't as common as they used to be in ISA format and are probably a few quid each too... I'll have a look once I get some more urgent stuff out of the way.
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Old 21 November 2018, 21:46   #10
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If possible I suggest you replace your drives with solid state devices. I appreciate this is not easy with SCSI. I'm in the same position :-(
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Old 22 November 2018, 10:14   #11
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I'm quite comfortable with all the positives and negatives of mechanical hard drives In fact, it's a mechanical IDE drive that I want this bracket for personally (albeit attached to the SCSI bus via an adaptor).
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Old 09 January 2019, 22:07   #12
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Just got my first batch of boards for this, and they look pretty good I left off the power connector for now, because I wanted to squeeze the board into a half-length slot so that it could be used in line with short cards like BuddhaIDE and so on. Drives can be mounted on either side of the board, allowing for flexibility, and there are holes provided for both 3.5" and 2.5" (old style and newer style) drives.

A couple of quick photos:



Installed in line with a Buddha Flash Zorro card:



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Old 09 January 2019, 22:33   #13
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Wow that's really nice! I would definitely be interested in buying one if you decide to put some up for sale.
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Old 09 January 2019, 22:46   #14
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Cheers! I've a few other things to sort out first, but I'll have a few for sale soon.
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Old 10 January 2019, 02:10   #15
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Has there been such a thing as a blank ISA card with mounting holes for a hard drive?
Indeed there has been such a thing. I've got one for 8-bit ISA in a box somewhere.
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Old 31 January 2019, 00:21   #16
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Okay, I have a handful of these available for sale now if anyone's interested, details in this Marketplace thread.
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Old 01 February 2019, 09:57   #17
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This looks awesome! Still, there's no reason not to take power from the ISA bus (the Amiga ISA bus doesn't have data, but it DOES have power) so you could power the drive with a short patch cable. You wouldn't have to make the card any larger if you just got rid of the ambidextrous nature of it (i.e. you have to put the drive on the canonical ISA hardcard side -- facing toward the power supply/right hand desktop/top side tower), and the power connector is on the other side.
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Old 01 February 2019, 12:18   #18
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Cheers! Yeah, the first version I drew up had pads for a power connector, but I removed it to keep the board short enough to not overlap the Zorro connector. Being able to mount the hard drive on both sides isn't an issue, it's merely a side-effect of the symmetry of the mounting points. If the power connector was put on the opposite side to the drive (regardless of which side it's mounted on), there's a risk of the rear of the pads shorting against the underside of the drive.

I could put the pads along the top edge - there's not really enough space to fit a proper connector, but the wires could be soldered directly to them in that case, as is done on the GVP HC+8. Maybe for a future revision if I end up making more...
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Old 01 February 2019, 15:32   #19
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I could put the pads along the top edge - there's not really enough space to fit a proper connector, but the wires could be soldered directly to them in that case, as is done on the GVP HC+8. Maybe for a future revision if I end up making more...
It's a pretty narrow row of 4 through-pins that would clear most drives on plenty of spots around the perimeter, but for added safety you could epoxy the joints/pads to prevent shorts.
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