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 expert 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 repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (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:

1 Answer

Transfer rate is too slow 1 - 2 MBPS write speed read speed is ok in USB 2.0. I formatted the drive using storejet and then the wite speed moved up to 15 - 20 MBPS. after copying 2 folders it again dropped...

I got exactly the same problem with my Transcend Storejet 25M2 500GB hard disk. Formatting didn't helpw much and specifically the write speed is very slow, formatting improved the read speed though.

May 16, 2011 | Transcend 640GB Transcend StoreJet 25D3...

1 Answer

I have a autorun.inf virus in my cimputer that disable my task manager and regedit. please help me!!

Remove the disk-drive from your computer.
Attach it as a "slave" disk-drive in a different computer that has up-to-date anti-virus software installed.
Run the anti-virus software, targeting "all" the files on that "slave" disk-drive,
if you believe that it is possible for any anti-virus software to remove 100% of any computer-virus.

Or, read:

which describes "best practises", namely to copy all your data files, "flatten" the disk-drive,
reinstall Windows, and reload your data.

Or, take this incident as an "opportunity" to install a new (larger? faster?) disk-drive into your computer, disconnecting the old disk-drive, and to reinstall Windows,
and to install an anti-virus software package.
Then, temporarily attach the old disk-drive as a "slave" drive, and copy all your files.
When the copy completes, FORMAT the "slave" disk-drive, to wipe-out ALL the files on that disk.

Nov 02, 2010 | Computers & Internet

2 Answers


There are a number of issues might be affecting your PC's performance, some are dangerous while others not that serious.

Learn why is your PC running slow and how to speed it up easily from:

Good luck to your PC!

Jul 04, 2010 | Computers & Internet

1 Answer

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

Chances are your disk is partitioned. If it's your Operating System drive, you should reformat with your OS disc. If it's just a secondary drive, check in Disk Management (Windows) or Disk Utility (Mac/Linux) and you can re-partition the drive as you desire.
For windows, do search in the start menu search bat to find disk management, and in mac use spotlight to find disk utility.

Mar 10, 2010 | Western Digital Caviar WD2500JB Special...

1 Answer

Platters spinning. drive not accessible. Shows up in Device manager but not Disk ManagerBefore it failed there was a whir-click for a minute. Let it sit for a week. Now nothing. Will not even work as a...

your drive is completely shot. their is one trick that you can try, but if it dont work you will need to buy a new hardrive. take your hard drive out of your computer, wrap it up in a plastic bag, as tight as you can, tie it off. put it in your freezer over night, take it out, first thing next morning.. Unwrap it, and let it set at room temp for about 6 hours.. then try it again.. the reason this might work is because inside your hard drive the reader pin is on a very thin piece of metal. Sometimes during the use of your computer this gets really hot and can bend some. causing hard drive issues. Cooling, and re heating the metal inside your HD can sometimes bend it back out where it should be.

good luck

Dec 22, 2009 | Western Digital Caviar WD2500JB Special...

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...

1 Answer

XP sees and names added slave HD but won't show files

What kind of Windows do you have on the 4300 most likely the reason is file systems. The XP has NTFS file system and is not readable under Windows 98 SE if that is what you have on your 4300 computer. An option that you have is to update the 4300 to an XP to read the data on the drive.

Jan 05, 2009 | Seagate Barracuda 7200.7 ST380011A 80 GB...

1 Answer

Slow write hdd

well..sounds a lot like it's just really unhappy. data recovery is recommended, and then try a low level reformat of the drive.

Apr 03, 2008 | Western Digital My Book Essential Edition...

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

Related Topics:

701 people viewed this question

Ask a Question

Usually answered in minutes!

Top Western Digital Computers & Internet Experts

Brian Sullivan
Brian Sullivan

Level 3 Expert

27725 Answers

Mark Taylor
Mark Taylor

Level 3 Expert

728 Answers


Level 3 Expert

5660 Answers

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

Answer questions

Manuals & User Guides