Second hard drive very slow


I have just built a new computer, specs as follow:

OS: Win 7 Pro 64bit
CPU: i7-2600
GPU: Gainward GT 520
Mem: 8GB DDR3 1333
HDD: 2TB WD20EARX (x2)
MBo: Asus P8H67-V

It's all working fine except for the second hard drive which is extremely slow (~2-4MB/s) when reading / writing /deleting large numbers of files at once.

Both hard drives are SATA 3, and connected to the two SATA 3 connectors on the motherboard.

The primary (boot) hard drive with Windows on is working fine - rapid read / write of files as expected.

On the second drive, the speed drops to ~4 MB/s or less when working with multiple files. For example, a 2GB folder containing ~20,000 files takes over 40 minutes to copy on the second drive compared to under 2 minutes on the primary drive. For single large fies it generally starts fairly fast (~30MB/s) then drops to around 10MB/s or less. General use read-write on the drive is also very slow - I've been trying to run an XAMPP server on the drive and it's reguarly breaking PHP's 30 second timeout when loading very basic web pages.

I've tried a few things already:

1) Killed anti-virus
2) Removed drive volume and re-created
3) Turned off Windows file contents indexing on the drive
4) Drivers on the system are all the latest versions

Any thoughts would be appreciated ...

Thanks in advance
10 answers Last reply Best Answer
More about second hard drive slow
  1. Have you enabled Write Caching under Control Panel>Device Manager>Disk Drives>(Right Click on drive)Properties>Policies?
  2. Yes - both drives have write caching enabled (by default).
  3. Hmm actually the drive is now refusing to complete any write operations at all - I'm starting to think it may be faulty ...
  4. Maybe time to RMA the HDD.
  5. You need to verify you have the REV 3.0 - B3.

    If not, you might have the Intel B2 Booger and need to replace the motherboard, OR move to the SATAII connector.

    Asus should give you a free replacement.
  6. It is the Rev 3.0 B3 revision. What is the issue with the earlier version?

    I actually just had windows lose the drive - it dropped out half way through a file transfer and just stopped showing it in Explorer / Computer Management -> Disk Management.

    Came back after a reboot.
  7. The B2 SATAIII controller goes to crap and corrupts the HDD/SSD
  8. Best answer
    Go to drive manuf website and down load there HDD utiliies and check the drive.
    Most Likely a defective drive.

    Side comments.
    For WD I only buy their "Black" models. Looking at the "Green" model it has a very High dissatisfaction rating @ Newegg, Like 33% 1 gg - ouch.
    Compared too:
    PS often onsale for around $60
    Currently my drive of choice is the Samsung F3, but max size for it is 1 TB.
    Use to buy the WB Blacks, but switche to Samsung's F3 for the last 3 that I've bought.
  9. Good call on the diagnostics tools - the drive failed within seconds.

    Problem down to a bad disk then - thanks everyone for your suggestions.
  10. Best answer selected by sobaros.
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