Hard drive mounting brackets

[Qyöt27]

So as part of what will probably be a recycling of the iMac my parents no longer have use for (mainly because its screen died), there's a spectacularly high chance of me taking the HDD out of it, wiping it, and using it for secondary storage. It'd effectively double the hard drive space inside my computer, since it's a 160GB drive, and I already have a 160GB main drive. Either Ubuntu will get its own hard drive, or I'll have a larger storage area for media.

The problem, is that the existing HDD is not in a dedicated drive bay - it's mounted directly to the case with a bracket (and one that only looks to support one drive). If I want to mount a second drive in there, I'm obviously going to need to buy another bracket, made more complicated by the fact that the drives are different sizes: the main drive is 3.5", and as usual for iMacs, its drive is 2.5". I also know I'll have to get a PATA<->SATA adapter since my computer is too old to support SATA, and the iMac was from 2006 so SATA is practically a certainty for it.

Any suggestions on what route I should take on this? A second bracket that I can affix to the first (is that possible?), or an entirely new bracket that supports two drives of different sizes?

The case is microATX, if this matters any.

 

[EphesiaNZ]

Well if you have enough space, you could mount the 2.5" drive directly to the case by drilling 4 small holes in the case and mounting the drive directly to the case - maybe use a couple of washer at each screw hole to leave a small ventilation gap to keep the drive cool.

 

[Qyöt27]

Turns out the iMac drive is actually probably 3.5" (only recent - late 2012 models - started using 2.5" drives, apparently), but the question of what sort of bracket is needed still applies. I don't really want to attempt drilling holes in the case, especially since the only free area to do so would be the case's floor (and chances would be that the ribbon cable wouldn't reach down to it if I put it there).

In extreme circumstances I could just go with removing the floppy drive and putting the drive in its bay, but there are a couple things (backups of firmware, IIRC) that need a floppy.