SATA speed from 3.0 to 1.5?


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Anyone see this after 10.6.3 update?

sata.png

See the Negotiated Link Speed? I bet this was not in 10.6.2, but appeared on 10.6.3. Somehow i feel after the update response seems to be slow on my mini.

Care to comment on this.

Thanks

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In 10.6.3, this piece of information was added to System Profiler. Note that this is new information - if your hard drive negotiated 1.5GBit in 10.6.3, it negotiated 1.5GBit in earlier versions of the OS as well - earlier versions just didn't tell you.

As for the computer feeling slower, that's probably either psychological or something else - unless you're using a kickass SSD, your drive won't be saturating 1.5GBit, never mind 3.0.

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yup its the stock hard drive which is a fujitsu. Ok since thats the case then be it. Didn't know that previously also like that and the information was newly added.

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yup its the stock hard drive which is a fujitsu. Ok since thats the case then be it. Didn't know that previously also like that and the information was newly added.

Are you sure it is the hard disk that it is referring to or the cd/dvd drive? I have a MacBook Pro and the DVD/CD is negotiated at 1.5Gbps.

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Are you sure it is the hard disk that it is referring to or the cd/dvd drive? I have a MacBook Pro and the DVD/CD is negotiated at 1.5Gbps.

Its for both the hard drive and superdrive.

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Its for both the hard drive and superdrive.

Is it a stock standard drive that came with the Mac or did you upgrade it? I know for some drives they default to 1.5Gbps as standard for the sake of compatibility thus requiring you to manually set it to 3Gbps. Here are the details from my hard disk, its Fujitsu and I am very happy with it:

NVidia MCP79 AHCI:

Vendor: NVidia

Product: MCP79 AHCI

Link Speed: 3 Gigabit

Negotiated Link Speed: 3 Gigabit

Description: AHCI Version 1.20 Supported

SAMSUNG HM641JI:

Capacity: 640.14 GB (640,135,028,736 bytes)

Model: SAMSUNG HM641JI

Revision: 2AJ10001

Serial Number: Removed for privacy reasons lol

Native Command Queuing: Yes

Queue Depth: 32

Removable Media: No

Detachable Drive: No

BSD Name: disk0

Rotational Rate: 5400

Partition Map Type: GPT (GUID Partition Table)

S.M.A.R.T. status: Verified

Volumes:

Macintosh HD:

Capacity: 639.79 GB (639,791,054,848 bytes)

Available: 611.94 GB (611,942,465,536 bytes)

Writable: Yes

File System: Journaled HFS+

BSD Name: disk0s2

Mount Point: /

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Only my superdrive runs at 1.5 Gb:

NVidia MCP79 AHCI:

  Vendor:	NVidia
  Product:	MCP79 AHCI
  Link Speed:	3 Gigabit
  Negotiated Link Speed:	3 Gigabit
  Description:	AHCI Version 1.20 Supported

KINGSTON SNV425S264GB:

  Capacity:	64.02 GB (64,023,257,088 bytes)
  Model:	KINGSTON SNV425S264GB                   
  Revision:	C091126a
  Serial Number:	07MA20037697        
  Native Command Queuing:	No
  Removable Media:	No
  Detachable Drive:	No
  BSD Name:	disk0
  Partition Map Type:	GPT (GUID Partition Table)
  S.M.A.R.T. status:	Verified
  Volumes:
Macintosh HD:
  Capacity:	63.68 GB (63,679,283,200 bytes)
  Available:	12.1 GB (12,102,959,104 bytes)
  Writable:	Yes
  File System:	Journaled HFS+
  BSD Name:	disk0s2
  Mount Point:	/

NVidia MCP79 AHCI:

  Vendor:	NVidia
  Product:	MCP79 AHCI
  Link Speed:	3 Gigabit
  Negotiated Link Speed:	1.5 Gigabit
  Description:	AHCI Version 1.20 Supported

HL-DT-ST DVDRW  GS21N:

  Model:	HL-DT-ST DVDRW  GS21N                   
  Revision:	SA18    
  Serial Number:	KZ189B91432         
  Native Command Queuing:	No
  Detachable Drive:	No
  Power Off:	Yes
  Async Notification:	No

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how do you set the speed manually?

its more to do with the HDD or the jumpers on the HDD. It's rather the HDD only support 1.5 or theres a jumper setting it to 1.5 (usually becuase the chipset only supports 1.5, which in this case that's obviously not the problem)

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how do you set the speed manually?

What model is your hard disk? have you gone to the hard disk manufacturers support page to download the enabling/disabling features software?

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Again, are there any benefits of having a laptop HDD that connects through SATA 3 Gigabit?

Not really - I'd love to see a hard disk reach 3 Gigabits per second - it would pretty much invalidate the need for flash drives lol

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