Question about Western Digital Caviar WD2500JB Special Edition 250 GB Hard Drive

2 Answers

Slow write speed

I have a wd2500jb and a great problem for its write speed is only 0.48MB/s
while the read speed is 28.8MB/s, it installed as slave under windows xp pro
please tell me how to fix this problem. best regards

Posted by on

  • siggma Oct 19, 2008

    I have a GA-945-GCMX-S2 motherboard with intel IC7 SATA / PATA mixed controller. It was advertised as a 3GB SATA controller. Now I suspect it's some kind of ATA converter. It shows my SATA drives as UDMA 5 which is clearly incorrect.

    Anyway, I have two WD2500JS (3GB) SATA drives connected. Under windows Vista (original or sp1) I get extremely slow data transfer between the two SATA drives but a third ATA WD200 copies at 35 to 65 mbps to and from either SATA drive. The ATA is an old WD200 that supports UDMA mode 5. In other machines it rarely exceeds 20mbps. I now use it as browser cache and swap since it's faster than the SATA.

    Both SATA drives pass WD diagnostics and a smart full self test passes on both drives. I don't think it's the drives but that's pure speculation.

    The issue is extremely slow transfer between the SATA drives. I've tried swapping cables, moving them to different ports and changing BIOS configuration but no difference. I've tried moving the drives from 0 to 1 and that does make a difference but ONLY AFTER I REFORMAT either drive. This is a real bugger of an issue. Copying files in Vista is sometimes 50mbps and other times it pokes along at 4mbps. If there's a pattern I haven't found it.

    Any ideas?

  • dmitry_bug Apr 13, 2009

    I also have the same problem. I have two wd2500ks and 2500js, their write speed >1MB/S but is shows normal write speed like ~50mb/s



2 Answers

  • Level 1:

    An expert who has achieved level 1.


    An expert whose answer got voted for 2 times.

  • Contributor
  • 1 Answer

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.

Posted on Jul 13, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has answered 1,000 questions.

  • Master
  • 3,587 Answers that 250 Gigglebyte drive, as a slave, on a secondary port, by chance?

Posted on Mar 23, 2008


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Technician can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Technician (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

Wont see slave Hard Drive in a Dell Dimension 2400

Did you set the Master harddrive as master?

Or is your reference that you set the jumper cap, on the jumper pins; of both harddrives to Cable Select?

What are the manufacturer names, and model numbers of the two harddrives?

If you just see something like - WD2500JB, that will work.

How many wire is the Flat IDE ribbon cable?

There are 40 wire versions, and 80 wire versions.

Notice I stated - Wire.
They will both have 39 socket holes that are used.
(40 socket holes, with 1 blocked off)

80 wire IDE ribbon cable has Master harddrive in middle.
Slave harddrive at end of cable.
Little weird, huh?

40 wire IDE ribbon cable, has Master harddrive at end of cable, Slave in middle.

As for, "Computer will not see it."

Not trying to insult your intelligence. Am trying to see if we are both on the same page.............

1) You go to My Computer, and there is no drive letter assigned to that harddrive you just installed?

If it is there, you double-click on it to open that harddrive.

Please post back in a Comment.

Mar 30, 2013 | Dell Dimension 8400 PC Desktop

1 Answer

Update driver for Western Digital WD2500JB-00REA0

Hard drives don't require special drivers. Should work perfect as is.

Jan 11, 2013 | Western Digital WD2500JB-00REA0

1 Answer

I'm trying to increase hard disk space on a Dell


The Dell Inspiron 1100 is a laptop whereas the Dell Dimension 2400 is a desktop pc.

The hard drives are incompatible because they are a different size, plus the Inspiron only supports one hard drive so you can't install a slave device. The only way to increase hard disk space is to buy a large capacity internal IDE laptop drive or an external hard drive.


Jan 01, 2013 | Computers & Internet

1 Answer

WD2500JB HDD FAILED. On board chip U1 burnt out. How can I retrieve data on HDD to another HDD. If card replacement needed, any idea where I can get one from, and how much? Drive details are: MDL:...

You're going to need a professional data recovery service to get your files. Just google data recovery companies and find out what they charge. You may get lucky and have one close by.

Sep 05, 2010 | Western Digital Caviar WD2500JB Special...

1 Answer

I want this one WD2500JB

That is an old drive. No need to buy an exact replacement since that one is so old. Any hard drive will do. If your BIOS supports a larger drive, you can get an even higher capacity drive to replace it.

Apr 15, 2010 | Western Digital Caviar SE WD2500JB 250 GB...

1 Answer

Laptop 2nd HDD(Slave) running max 20mb/s

Why not install a new 2.5" hdd in your laptop caddy.I replaced my 40gb with a 160gb, works fine and the data tranfer speed is better than a slave configuration. The average speed of around 40mb/sec Is because of the smaller platter, the amount of cache, the firmware installed and so on.

Apr 09, 2010 | Fujitsu Computers & Internet

1 Answer

My WD2500JB stopped working. Makes a click-click-click sound.

Your hard drive is bad. If you are hearing clicking reptitiously it is you head not moving. Sorry about the bad news.

Dec 16, 2009 | Western Digital Caviar WD2500JB Special...

2 Answers

My hard drive is a wd2500jb and its only giving me 130 gb of space. How do i get the full 250 gb?

I assume the hard drive is installed inside the desktop computer.
Depending upon the age and make of the motherboard/BIOS, it may not support a hard drive as large as the 250Gb capacity. You maybe able to upgrade the BIOS version to allow it to access the full capacity of this hard drive. Go to the motherboard manufacturer's WEB site to download the latest BIOS firmware.

Sep 03, 2009 | Western Digital Caviar WD2500JB Special...

Not finding what you are looking for?
Western Digital Caviar WD2500JB Special Edition 250 GB Hard Drive Logo

Related Topics:

713 people viewed this question

Ask a Question

Usually answered in minutes!

Top Western Digital Computers & Internet Experts

Arora Singh
Arora Singh

Level 2 Expert

180 Answers

Alun Cox

Level 3 Expert

2678 Answers


Level 2 Expert

191 Answers

Are you a Western Digital Computer and Internet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides