Its an eide western digital wd2500jb, it writes at only 0,47Mb/s when it is supposed to write at 57Mb/s. it has gotten worst now windows will not recognize it and WDDIAG can not complete the tests and it used to complete them before. what can i do? going nuts. thanks for your help
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What do you mean by slow? Compared to an SSD the HDD would obviously be slower. If you're running your OS and everything off that HDD, try defragmenting it. Please run benchmark tests (e.g. Crystal Mark) and tell me the results you get! Typically you should get 120MB/s for your type of hard drive.
If it is an "external" drive, you can open the casing, remove the disk-drive, and "transplant" the disk-drive into a new, "empty", enclosure (about $30 at any computer-store).
If it is an "internal" drive, you'll have to find an identical disk-drive, split the "electronic" circuit-board from the "spinning" part, on both drives, and then connect the "good" circuit-board to your disk-drive.
To be sure your hard disk is ded or just have probs in the casing just try to remove the hd from the casing and connect it directly to the system if its 2.5 tb u would have 2 hard drive orthree please connect all of them to gether to your system other wile it could become unalocated
if it works u have prob in the casing so just change the case .
but before going through all this just connect the hdd and go to disk management by right clicking on the my computer icon go to manage and then diskmanagement if itshown there as forgen or unalocated just let me know i will tell you what to do
thanks and regards
Had the same problem with my WD2500KS-00MJB0. It also has the (widely reported) defect where the thermal sensor is not reporting correctly (ie 40C when it's just been powered on, and should be reading approx 20C!).
My suspicion is that this line of WD2500KS models has a defective thermal sensor, and after a period of time the thermal sensor fails. When this happens, I suspect that the drive firmware tries to lower the temperature by reducing write speed.
My drive was out of warranty, so I used the 'Customer Loyalty Upgrade' discount on the WD Warranty Check site to get a new 500G drive. I still have the old drive, and some technical knowledge, so I'll see if there's a hardware hack to disable the thermal sensor.
Otherwise, go to the WD site's Warranty Check page, and get yourself a (heavily discounted) Customer Loyalty replacement.