Western Digital WD740ADFD: Bottled Lightning
by Gary Key on February 7, 2007 3:30 AM EST- Posted in
- Storage
Theoretical Performance: HDTune
The Western Digital WD740ADFD has the highest overall sustained transfer rates of the three Raptor drives tested. The end test results are very similar to the WD1500ADFD and we attribute this to the single platter design, although we expected additional decay in the sustained transfer rates near the end of the test that did not occur. The WD740ADFD also bettered the WD1500ADFD in the random access, burst rate, and CPU utilization numbers.
The WD740GD actually had the best random access rates and CPU utilization numbers even with its limited buffer cache. However, this drive was not able to sustain the same average and maximum transfer rates due to the smaller cache, firmware, and older two platter design. Although the WD740ADFD drive has excellent sustained transfer and random access rates we will soon see this does not always translate into class leading performance.
The Western Digital WD740ADFD has the highest overall sustained transfer rates of the three Raptor drives tested. The end test results are very similar to the WD1500ADFD and we attribute this to the single platter design, although we expected additional decay in the sustained transfer rates near the end of the test that did not occur. The WD740ADFD also bettered the WD1500ADFD in the random access, burst rate, and CPU utilization numbers.
The WD740GD actually had the best random access rates and CPU utilization numbers even with its limited buffer cache. However, this drive was not able to sustain the same average and maximum transfer rates due to the smaller cache, firmware, and older two platter design. Although the WD740ADFD drive has excellent sustained transfer and random access rates we will soon see this does not always translate into class leading performance.
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AnnonymousCoward - Tuesday, February 13, 2007 - link
Good review. I don't think I'll ever buy one of these. For as expensive as they are, the storage size is small and the performance diff is minuscule. Sims2 loading: 30s vs 31s! MP4 conversion: 3:04 vs 3:14! Amazing!Then the thermals and acoustics are really bad.
Lakeshow - Friday, February 9, 2007 - link
I think 74GB is plenty for an OS drive (hell even 36GB should suffice). Sure a 500 gig is cheaper, but I would never use that as my OS drive: simply too much stuff to back up when doing a reformat. Yeah I can do partitions, but then file transfer between partitions is much slower than between two drives, which is why I have my 74GB Raptor as OS drive, 500 giger as D:/storage drive, and then a 36GB Raptor as E: drive for torrent downloads.JonathanYoung - Thursday, February 8, 2007 - link
I think the graphs look great, but in the ones with minutes and seconds, I would suggest using a colon (e.g. 3:05) to denote minutes:seconds instead of a decimal, which makes me think 3.05 minutes (3 minutes 3 seconds). Thanks.Gary Key - Thursday, February 8, 2007 - link
We have an updated graphing engine coming on-line in the next few weeks that hopefully will fix that issue. It bugs me to no end to use the decimal point in that way. ;)TheBeagle - Wednesday, February 7, 2007 - link
Gary, as usual, you did a helluva job on a first-class review on these new generation Raptor drives. However, you especially captured my attention when you wrote "Although TLER is disabled by default, a utility is available from Western Digital to enable TLER." The existence of such a "utility" was a revelation to me. I have a couple of these same 74 GB and 150GB drives, each running in pairs in a RAID 1 environment, and I didn't have any knowledge of such an enabling/disabling "utility." Can you share the source for such a little delight and how we mere mortals get our hands in such a thing? Thanks again for a stellar report, and now we can just hope that WD adopts perpendicular recording (ala 7200.10) and SATA II specs for a world-beater drive. TheBeagleTheBeagle - Saturday, February 17, 2007 - link
I got WD to send me a copy of the TLER "utility." To my surprise, when you run it on new generation Raptor or "YS" series drives, it shows you some very interesting information. First of all there are two (2) separate TLER setting for these drives, namely a read setting and a write setting. On Raptor drives, BOTH ARE DISABLED from the factory! That's right, even though WD advertises this feature as being built into the Raptor drives, it's NOT OPERATIONAL unless you get your hands on the "secret" utility and activate it. On the YS drives, ONLY THE READ feature is activated, and the write feature is disabled. BTW, although WD says that the TLER feature on YS series drives cannot be disabled, the utility has a command that will do just that, disable both the read and write (if you have activated it) feature on those drives. I think WD has some serious explaining to do about all of this, since they (WD) have been creating a false impression to the buying public about these TLER features in these drives!Makaveli - Wednesday, February 7, 2007 - link
he is right it all comes down to your usages pattern, in general home users don't need Raid O. However, if u happen to say be running a webserver from home, or doing alot of Disk intensive stuff its a good investment, but the original Comment still stands.I would never go raid 0 in a gaming rig, a 75/150 Raptor + Storage drive is a far more optimal solution.
Makaveli - Wednesday, February 7, 2007 - link
hey is right it all comes down to your usages pattern, in general home users don't need Raid O. However, if u happen to say be running a webserver from home, or doing alot of Disk intensive stuff its a good investment, but the original Comment still stands.I would never go raid 0 in a gaming rig, a 75/150 Raptor + Storage drive is a far more optimal solution.
Brassbullet - Wednesday, February 7, 2007 - link
So does the fact that I have a WD740ADFD-00NLR as my Windows XP boot drive and a Seagate 7200.10 750 GB as my "My Documents" location mean I'm living the I/O dream? I've had this setup for months and didn't really think much of it, man was this article a PC ego booster!!littlebitstrouds - Wednesday, February 7, 2007 - link
This makes me feel good about the $109 I just paid for my new 150gig at BB because I Vista too.