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Problem with 750 GB HDD

I install new HDD 750 GB WESTERN DIGITAL but when bootup or run a application is go very slow. With the old one HDD the system run ok and the new 750 GB disk is ok

The installation of the Leopard OS took about 5 hours. Do you know why is doing that ?

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You may have some bad bad blocks on the new drive. Use Disk Utilities on your system installation disk and reformat the drive and use the "write zeros" option. Then give the drive at least one partition. Let us know your results.

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I test the disk and is not have any problem or bad blocks, i will test tomorow with a new 500 GB hybrid HDD (Seagate Momentus XT ST95005620AS)

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How quickly will a system load now?

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The same problem with Seagate Momentus XT ST95005620AS. I put the old factory HDD and plays just fine!!!

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You may have gotten a bad drive, I'd ship it back

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All new drives have bad blocks. I would "zero-out" the drive to re-allocate those bad blocks and re-install the OS. I would also boot from the installation CD and install the OS with the drive inside of the machine. Installing to an external USB or Firewire enclosure is not as fast as as SATA2 data transfer speeds. Also when a drive is new and has a fresh install of OS you must let Spotlight completely index the drive before using it or trying to open applications. If you try to access the drive while spotlight is indexing the drive you will get this type of performance hit. Also, remember that the drive will get faster and faster as you use it. After you install the OS and boot up, notice the little dot in your Spotlight Icon...this is telling you that Spotlight is indexing the drive. You must NOT use the machine while this is in motion. Let Spotlight do it's thing and then use the machine as you normally would. You will see how the boot-up times decrease and performance increases as you use the machine more. I doubt very much you got two bad drives in a row. Try my recommendations and be patient.

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+ I had forgotten about the spotlight. Thanks for the reminder.

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Have the same problem with WD 7500BPVT.

after complete format I started with the Installation Disk.

the Installation was fine, it took about 1 hour, but the system was very slow.

I started the upgrade from leopard to snow leopard and the installation takes more than 10 hours, so I quit it.

Is this normal?? I replace the old drive and I have no problems!!

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If you having problems after upgrading your HDD, like freezes and the spinnig ball try downgrading your EFI to 1.6.

I upgraded my MacBook Pro with a Seagate Momentus XT, with EFI 1.7 is had a lot of problems but after downgrading to EFI 1.6 everything works perfect.

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