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|  | |  | | | Seagate Momentus 7200.4 500 GB 7200RPM SATA 16 MB Cache 2.5-Inch Bare Drive - ST9500420ASG | | | | | | | |
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ST9500420ASG | | In Stock | | Availability:
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| | Features | Ships in Certified Frustration-Free PackagingTwo Year Warranty
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| | Description | Momentus 7200.4 2.5Inch 500Gb 7200Rpm 16Cch Sata | |
| | Product Details | | Product Length: | 12.0 inches | | Product Width: | 6.0 inches | | Product Height: | 6.0 inches | | Product Weight: | 0.24 pounds | | Package Length: | 10.5 inches | | Package Width: | 7.2 inches | | Package Height: | 3.6 inches | | Package Weight: | 0.55 pounds | | Average Customer Rating: |  based on 30 reviews |
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| | Customer Reviews | Average Customer Review: ( 30 customer reviews )
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Most Helpful Customer Reviews
7 of 7 found the following review helpful:
 Big, fast, quiet. Awesome! Nov 28, 2009
By John A. Atilano II
"iHusband"
I purchased this drive to replace the Seagate 7200.3 320GB HD on my MacBook Pro. This drive is just as fast, if not faster. Installation was a snap and it is running like a champ. The drive is very quiet. Highly recommend this drive as an upgrade. With all of the extra room, I installed Ubuntu 9.10. No issues running this drive in a dual-boot, multi-partition configuration. If you want the biggest and fastest (SSD's excluded) hard drive on the market, this is the drive to get.
6 of 6 found the following review helpful:
 WARNING WARNING WARNING!!! DEFECTIVE FIRMWARE and WARRANTY ISSUES Jun 19, 2010
By Matthew Elvey
"tech whiz"
THE ST9500420ASG HAS DEFECTIVE FIRMWARE.
This is well documented online if you search for this model number and clicking noise, e.g. on Seagate's own forums. In some cases, you can update the firmware to ameliorate the problem.
I note a few folks mention constant clicking. That's not something to be ignored. If you've got that clicking, your hard drive's _DETAILED_ SMART stats will probably show that the drive is in very bad shape. Check the Load_Cycle_Count; on my drives, this is approaching half a million cycles.
Also, there is NO WARRANTY if you get the OEM version. Seagate refuses to honor the warranty on these drives, even though their web site says their OEM drives have a 3 year warranty.
(Sorry, Amazon doesn't allow URLs in reviews, so I can't post links.)
16 of 20 found the following review helpful:
I've had two in a row fail... Jan 18, 2010
By Jonathan Birge
I am not going to say there is something wrong with these drives, because at the end of the day I'm only one guy with a bad experience. I'll just offer my review here so that people get a full perspective. I have had two of these fail on me in a row (actually, the non G-sensing version, but they are otherwise exactly the same drive). Both failed offline SMART tests, so they have truly gone bad. When they were working, the drives were very fast and quiet, though, so I can certainly understand the high marks people give these drives when they first get them. However, after a month or so, the drives would start to have problems.
I think it is fair to say that Seagate is really running these at the ragged edge of what is possible. While the transfer rates can approach 90 Mb/s at the edge of the platter--according to a few quick tests I ran--the transfer rate fluctuates greatly, and the SMART data shows a pretty constant stream of software-corrected (ECC) errors. In other words, you're not losing data, but the data coming off the drive is on the border of what is readable, such that the drive needs to rely on error correction and/or rereads (hence the fluctuating speeds) to get the data off. I base these conclusions on the fact that tests of data on the inside of the platter (which has much less speed) are much more reliable (albeit slower).
If you do decide to get one of these, do yourself a favor and backup (which you should do anyways, because all hard drives are subject to fail at any time). Though if you REALLY want to do yourself a favor. Choose another brand.
2 of 2 found the following review helpful:
Not compatible with mid-2009 MacBook Pro Nov 11, 2010
By E. Roberts
Disclaimer: This explains the reason for 3 stars. I bought this for my mid-2009 MacBook Pro and after lots of trial and error, talking with Applecare and Seagate support, I was unable to get the drive to work with that computer. At the same time my buddy who recommended it had no problems with it in his 2008 MacBook (i.e. non-Pro model). My research on the web shows that the firmware in the MacBook Pro is incompatible with the drive. That said, I can't give this drive a fair review.
1 of 1 found the following review helpful:
Just would not stay working Mar 07, 2010
By Wally Hynds
The first of these drives failed to be recognized by the computer on its third day.
Amazon swapped it out quickly (thanx Amazon).
The second started giving me sector failures after two or three days then would not complete a check disk.
Amazon refunded me quickly (thanx, again, Amazon).
Tried a different brand (Hitachi) next and it is working fine.
See all 30 customer reviews on Amazon.com
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