Advice on 3tb HDD

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planning to buy another 3 tb hdd.

already have own WD Caviar Green 3 TB Desktop Internal Hard Drive (WD30EZRX)

now I have a choice b/t WD Caviar Green 3 TB Desktop Internal Hard Drive (WD30EZRX) and WD AV-GP 3 TB Desktop Internal Hard Drive (WD30EURS), they will cost $146.85 and $141.28 respectively in my country.

which one should I go for and why please tell.


thanx for your help in advance

 

[Cerb]

Once you're past the marketing speak, it pretty much goes like this:
Desktop/notebook drive: if it has trouble reading something, it will reasonably exhaust all hope of extracting said data, with some drives taking up to 2 minutes (gddrescue and Spinrite can often go beyond what the drive may consider, "reasonable" ).
RAID drive: if it has trouble reading something, it will spend about 7 seconds trying to extract it, then fail, if it can't, and mvoe on to whatever else needs doing.
AV drive: if it has trouble reading something, you'd better have a backup.

AV drives are primarily for light duty DVR use, where you don't want the drive to stop recording, except if it is dying, but also don't have performance requirements that can't be easily handled by a single HDD. A marginal write being read back, or a weak sector, could mean data loss, that might not have happened on a regular desktop drive.

So, don't get anybody's AV drive, basically, unless you are replacing an AV drive in an embedded appliance.