Which internal hard drive do I need?
I would like to purchase a new 1TB internal hard drive for a Late 2009 3.06 GHz 27 iMac.
I noticed here on ifixit in the parts store section that "[i]f you have a 21.5" or 27" iMac, you must replace your hard drive with a drive made by the same manufacturer as your current hard drive. These iMacs utilize the hard drive's internal temperature sensor to control fan speeds. In all other machines you can install a hard drive produced by any manufacturer."
OK. So I looked at my system profiler and it says the following under Serial-ATA:
''NVidia MCP79 AHCI:
Product: MCP79 AHCI
Speed: 3 Gigabit
Description: AHCI Version 1.20 Supported
Capacity: 1 TB (1,000,204,886,
Serial Number: 5VP3M70J
Native Command Queuing: Yes
Queue Depth: 32
Removable Media: No
Detachable Drive: No
BSD Name: disk0
Rotational Rate: 7200
Partition Map Type: GPT (GUID Partition Table)
S.M.A.R.T. status: Verified
Capacity: 999.86 GB (999,860,912,12
Available: 660.35 GB (660,350,308,35
File System: Journaled HFS+
BSD Name: disk0s2
Mount Point: /''
The available brands listed for a 1TB SATA internal drive here on ifixit are Hitachi, Western Digital, and Seagate. Are any of these compatible? Or do I need to find a vendor that sells NVidia drives?
The "NVidia MCP79 AHCI" is actually the SATA controller chip on the motherboard.
Your hard drive is a "ST31000528ASQ" which means that you have a Seagate 3.5" drive. If you Google "ST31000528ASQ" you'll find that some iMac owners are hearing abnormal noises from this Seagate drive.
You need a compatible Seagate backup/replacem
For more details on this issue and a list of hard drives which are known to be compatible with this new method of sensing hard drive temperature, see this page:
The other factory-installed hard drive commonly seen in these late 2009 iMacs is the "WDC WD1001FALS" which is a Western Digital Caviar Black 1TB drive.
I bought the matching drive (Western Digital Caviar Black 1TB) for my Late 2009 iMac and still messed up the little wiring that keeps the fan from spinning out of control.
Fortunately, Someone pointed me to software fan controls:
- This one is free: https://www.macupdate.com/app/mac/47386/...
- and this one (which I bought and use) is $30: http://hddfancontrol.com/
If I could go back in time I would definitely have spent the money on an SSD and let software sort it out.