In general you can use any 2.5" hard drive that has the same interface 
(there are only two, IDE and SATA), and that will physically fit (e.g. 
not too thick ... all other dimensions are standardized, but there are 
several thicknesses).

Theoretically, the laptop might support a maximum size (gigabytes), but 
this model is new enough that I don't think drive capacity will be an 
issue.  Also, most laptops will take a 12.5mm drive, even if they come 
with thinner drives (and 12.5mm (1/2") is the thickest size in current 
or recent past production).  So the biggest issue is to make sure that 
you have the right interface, and I'm pretty sure that the A15 was IDE. 
  You don't have to stick with the same brand, and in fact if the drives 
that you mentioned are 4200rpm, I'd definitely take the chance to 
upgrade to a 5400rpm drive.



ramachandran.balu@gmail.com wrote:

> I have a Toshiba A15 S1292 laptop. Its hard disk is 30 GB and model
> MK3021GAS. I would like to replace the 30GB hard disk with new 60 GB
> hard disk, as the 30GB hard disk crashed.
> 
> I am planning to go for Toshiba hard drive model MK6021GAS( 60GB). I am
> 
> not sure whether this hard drive is compatible for A15 s1292 laptop. I
> am not able to find any document or web site where the compatibility
> details are given. I am not able to find that info on
> "www.toshiba.com". 
> 
> 
> Help  needed.
>