I bought an SSD, and it doesn't fit as my computer has a 3.5-inch hard disk drive. Can I use superglue to attach it to the metal hard disk drive holder or should I buy and adapter and wait?
I would use something semi-permanent. Double sided tape, Velcro or even some zip ties (tie wraps). Even if it is secured with one screw it is better than it hanging loose - it doesn't matter if it's hanging at an angle, upside down or back to front so long as the connectors and leads are 'comfortable'. The drive may be fine loose, but one thing to consider is the connector can actually wear if the drive is not secured.
Personally, I'd suggest that you buy the adapter and wait!
If you really HAVE to get the thing in and working - just install and use it wihtout glueing it - an SSD doesn't have moving parts, so its perfectly safe to install and run without needing to fix it in place and then when the proper chassis converter arrives, you can attach it to the case - just remember to not move or kick your base unit in the mean time!
While super glue will work and do what you need it to and will not damage the drive, you will be unable to remove the drive without damaging both the drive and drive bay/case when it comes to swapout time.
Just think - what if you find you need a bigger drive? What if the drive fails? what if you change case? Its really not woreth it for the sake of waiting a day. If its that vital - pay for quick shipping!
Bought a £5 CD drive adapter (shaped like CD drive with the right connectors) which was about 1mm too large - and 1mm too large doesn't fit. Took the original CD drive, threw out the insides, used the electronics from the cheap adapter, and fit the SSD drive with strong double sided tape. Works perfect.
Without any case, I'd probably use double sided tape instead of superglue; I just would trust it more to last for a few years and be resistant to shock.
SSDs are usually very light and they never exert dynamic forces on their mounts (as HDDs do), so almost any method of fixing them in place will work. But as others suggested, a permanent method, such as glue seems bit overkill, simply let it lie on the bottom of the case and order a proper bracket in the meantime.
As a side note, look on the back of your case motherboard mounting plate. Many cases have a "hidden" SSD mounting point there. Maybe you don't need any brackets after all. https://www.google.com/search?q=backside+ssd+mount&tbm=isch
The reason is that super glue is extremely brittle and has no tolerance for lateral force. The thermal expansion of the case vs the SSD as it heats up and expands at a different rate than the case will make short work of any super glue bond.
Double sided foam tape is your best bet other than a proper adapter as it can bend as the metal expands/contracts without hurting its bond, don't use too much as you want airflow around it, a square in each corner should do it.
Do not rely on super glue because :
- it gets "old" and fragile and if you try to move the chassis after an year it is possible that the SSD will bounce around and brake something else.
- you will have problems moving the ssd if you want after.
- the traces from the glue will void warranty.
If you are in extreme emergency try attaching it with plastic or other insulating cord-like material until you get it done properly. Otherwise do not do such a thing to your computer :)
Take care about fixing it in place though. Since the connector does not have any locker nothing blocks it from just going out. The SATA connector is not tight itself, it easily disconnect with slight movement. In order to avoid data corruption and/or SSD drive failure it is highly recommended to fix it in place.
Even if you freely put on the surface it can creep out after some time because of the vibration.
Fix it anyway until holder arrives.
Does the SSD expect the metal case of the drive to be electrically coupled to the grounded metal of the computer case? If so, superglue wouldn't provide that ground and may cause problems down the line.
I don't know enough about the electrical works inside a PC to be able to say if this is actually a problem.
Don't use superglue because it will become fragile and eventually crack as the case vibrates.
Try rubber bands, instead: http://lifehacker.com/378786/silence-your-hard-drive-with-elastic-suspenders
EDIT: I know that SSDs don't make noise. I suggested this simply as a mounting method, regardless of the "silent" effects.