What replacement Hard Drive do I need on 27" iMac

What hard drive do I need to replace a seagate ST31000322CS that is failing in my late 2009 27" iMac, I would like to replace like for like.


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If you decide to replace the drive, I would go with a Seagate SSHD 1 or 2 TB. This will give you a dramatic perceived speed increase.

You may have temperature sensor visor and run away fan if your original drive is other than a seagate. You will need (at minimum) Apple part # 922-9216 to prevent it. At most the OWC OWC In-line Digital Thermal Sensor for iMac 2009-2010 Hard Drive Upgrade https://eshop.macsales.com/item/OWC/DIDI...

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