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WD15EARS vs WD15EVDS

G

glc650

Senior member
Hi,

Anyone know how these two WDC drives compare performance wise? Warranties are the same. Cost is about the same. I think the EVDS is a newer drive? The EARS drives have a 64 MB cache (EVDS = 32 MB cache) and the EVDS is supposedly designed for mild 24/7 environments (whatever that means) but how does this equate to actual performance when compared head to head? Any particular reason I should buy one over the other?

Thanks,

->g.
 
One thing that is very different about the two drives is that the EARS drives are advanced format and the EVDS drives are not. That means that the internal construction/implementation is rather different. I've never seen any of the AV drives (EVDS, etc.) up close, but in general they should be rather like the EADS drives in the Green line. If you could find a some reviews comparing an EARS drive with an equivalent EADS drive that might give you some info. The WD website has some links to reviews of the EVDS drives, but you know they are only going to link to favorable reviews ...

The EVDS drives are in the WD AV-GP line and are intended for the DVR/security camera market. They have a feature called "SilkStream." I interpret that to mean that they support the ATA-7 streaming commands.

To quote from CNET ...
"SilkStream: This is the main feature that separates the WD AV-GP from others ...

Preemptive Wear Leveling: The drive arm frequently sweeps across the disk ...

WD AV-GP ... would work [on a] a desktop computer"

As it is an AV drive the controlling software (in your case the OS) can almost surely put the drive into a TLER mode where errors reading sectors are pretty much ignored. If you do get an AV-GP drive make sure that that is not set. Further research on your part is required. That research could be frustrated by the fact that "old style" product manuals for new drives are difficult if not impossible to find on the Western Digital website these days.

Anybody Care To Comment On That? WHY CAN I NO LONGER FIND PRODUCT MANUALS FOR NEW DRIVES ON WDC.COM? Is it me or is it the website? All I see are product overviews and spec sheets.
 
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