Regarding the Caviar Black & Caviar Green series of Western Digital HDDs , can anyone provide me with reviews or comparisons between these two series ?
What are the advantages or disadvantages for each of them ? Is there a significant difference in the performance , reading time , writing time , transfer rate .... etc ? Is it worth paying more money to get the BLACK or is it ok with the GREEN ? Which is good value for money ?
Any additional information would be very appreciated ?
The Green drives are optimized for low power usage and as a result they're noticeably poorer performers. In particular, they spin down after several seconds of inactivity so the first access to them after an idle period can take a few seconds.
The Black drives are geared more toward performance and they don't have any power-saving features to slow them down.
Choose a Green drive if you want bulk storage and performance isn't a concern. Green drives are especially good in external enclosures because they run a lot cooler than the Black drives.
If you want a drive that performs well, particularly if you plan to install the OS on it, choose a Black drive.
Specific models of blacks and greens vary a bit, but this probably reasonably representative for drives using the same platter density. Basically the black drive looks to have an access time and transfer rate that's about 20% faster than a green drive. It's really up to you to decide whether that's significant for your purposes.
For practical purposes I don't think there's any way to know if Green or Black drives in general will last longer - and individual drives vary even more. Lifespan is not something I'd really worry about in terms of choosing a drive. Simply be aware that ANY drive can fail and have a sound backup strategy in place.