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Unread postPosted: Mon Sep 08, 2014 11:49 am 
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So after reading some other threads here about using smaller 2.5" Savvio drives as replacements for 1/3 or 1/2 height 3.5" drives, I decided to give it a whirl. Settled on using 73G drives for my Indy, Challenge S, and Indigo 2.
I ordered up 3 IBM branded Seagate ST973401LC drives from ebay, 3 80-pin SCA to 50-pin Scsi adapters, and 3 2.5 to 3.5 drive mounting kits (just wanted this shape bracket, didn't need the 40 to 44-pin ide adapter)
Was a little paranoid about lack of high byte termination on the 80-to-50pin adapters, but the first one I tried seemed to work.

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File comment: Drive with adapter attached
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File comment: drive mounted on bracket, compated to Indy drive
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Attachment:
File comment: Compared to Indigo2 drive on sled
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Attachment:
File comment: dead 2GB Quanum drive dwarfs the little Seagate
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The adapters were tapped to M3 rather than the 6-32 common to 3.5" drives. I needed to move the mounting points anyway to get the forward side mount holes in the right place to hold the front cover for the Indigo2 sled. So drilled new holes and tapped to 6-32. Didn't get them exactly perfect, but close enough.
Attachment:
File comment: drilled and tapped bracket for Indigo2
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Attachment:
File comment: Bottom of Indigo2 sled. I wanted to keep these nylon sliders on the sled, so tapped new 6-32 theads in the 2.5-to-3.5 bracket.
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Lots of room for cooling. Hooked up the jumper block for ID selection to the 80-to-50 adapter.
Attachment:
File comment: 2.5" drive mounted on Indigo2 sled
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This sled can take a 1/2 height 3.5" drive, so no clearance issues at all.
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IMG_1784.jpg
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Apparently, my external cd drive is having some trouble, and had lots of read errors while I was trying to install 6.5. It worked a little better on its side.
Had to dust off my very rusty Irix admin knowledge, but eventually got a running system. I need to download and install the 6.5.22 overlay.
2.5" drive is very quiet (essentially silent compared to Indigo 2 fans) The drive gets a little warm, but not bad, definitely cooler than the 2GB Quantum was.

Next up will be the Indy. Not sure whether to try to clone the 9GB 6.2 drive to the 73G, and then try to upgrade to 6.5, or just do a fresh install of 6.5, and then copy stuff off the old drives.

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Unread postPosted: Mon Sep 08, 2014 2:09 pm 
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Wow, that Quantum drive survived 'till today? I remember they were dropping like flies in the nineties already. We would get replacements under warranty and they would die *again* before the warranty ran out.

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Unread postPosted: Mon Sep 08, 2014 8:39 pm 
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Nice. Thanks for taking the time to share the pictures and the links.


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Unread postPosted: Mon Sep 08, 2014 9:51 pm 
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Looking forward to seeing this in the Indy.


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Unread postPosted: Tue Sep 09, 2014 8:22 am 
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jan-jaap wrote:
Wow, that Quantum drive survived 'till today? I remember they were dropping like flies in the nineties already. We would get replacements under warranty and they would die *again* before the warranty ran out.


Well, I wouldn't say it survived really... When I brought the machine home in the early 2000's, it would only boot after resetting it several times. I put it away in storage until a couple of weeks ago. When I tried it, I could hear it spin up but couldn't get it to boot at all.

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Unread postPosted: Tue Sep 09, 2014 1:37 pm 
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That's some very nicely done drive transplant surgery, thanks for sharing it!

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Unread postPosted: Tue Sep 09, 2014 3:53 pm 
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josehill wrote:
Nice. Thanks for taking the time to share the pictures and the links.

what he said. very nice work :D

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Unread postPosted: Thu Sep 18, 2014 9:53 pm 
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So I just bought the same drives and same brackets, and have now discovered that Origin/Octane drive sleds pose a different challenge. Hmm, gonna have to think about this...

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Unread postPosted: Thu Sep 18, 2014 10:11 pm 
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Kumba wrote:
... discovered that Origin/Octane drive sleds pose a different challenge. Hmm, gonna have to think about this...

Something I discovered with an Octane DAT drive is, the front plastic piece of the sled comes off or unscrews (been a while) and the side plates will screw directly to a 3.5" drive. Probably any 3.5" drive ... gut an old floppy drive for the steel box and face plate ?

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