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Newbie
Posts: 2
Registered: ‎06-07-2012

Macbook Pro Link Speed 1.5G instead 3G

I recently install a Sandisk 480 R201 in my Macbook Pro 17 2009, It is not able to get 3 Gigabit speed, and the reading and writing speeds are the same , about 100kb, than my old 7200 rpm disk, becaus the old one use to work at 3Gb.

 

Can you help me to get up 3 Gb?

 

NVidia MCP79 AHCI:

 

  Vendor:NVidia

  Product:MCP79 AHCI

  Link Speed:3 Gigabit

  Negotiated Link Speed:1.5 Gigabit

  Description:AHCI Version 1.20 Supported

 

SanDisk SDSSDX480GG25:

 

  Capacity:480.1 GB (480,103,981,056 bytes)

  ModelSmiley FrustratedanDisk SDSSDX480GG25                   

  Revision:R201    

  Serial Number:121677400618

  Native Command Queuing:Yes

  Queue Depth:32

  Removable Media:No

  Detachable Drive:No

  BSD Name:disk0

  Medium TypeSmiley Frustratedolid State

  TRIM Support:Yes

  Partition Map Type:GPT (GUID Partition Table)

  S.M.A.R.T. status:Verified

 

 

SanDisk Guru
Posts: 4,548
Registered: ‎07-18-2007

Re: Macbook Pro Link Speed 1.5G instead 3G

this is a documented issue all over the MAC forums as well as a post on this forum as well. It seems this is a compatibility issue with the Nvidia MCP79 chipset and sanforce controllers. Currently there is no work around for sandisk drives. The issue has been reported and sandisk engineering is working with LSI Sandforce on a possible fix. We do not know if or when a fix would be released. 

Newbie
Posts: 2
Registered: ‎06-07-2012

Re: Macbook Pro Link Speed 1.5G instead 3G

Seems than other brands like OZC got a solution for this issue. Do you think that is better to return the disk and get a working properly oneform another manufactur?

SanDisk Guru
Posts: 4,548
Registered: ‎07-18-2007

Re: Macbook Pro Link Speed 1.5G instead 3G

currently the only manufacturer that has this working is OCZ and it is a work around that pins the drive to SATA 3Gb. 

Newbie
Posts: 4
Registered: ‎06-22-2012

Re: Macbook Pro Link Speed 1.5G instead 3G

Hi,

 

I had been in contact directly with SanDisk Support (Lance Carpenter) regarding this issue as well, since May.  He mentioned that it has been brought to the attention of the SanDisk Engineers and were in the process of discussing possible solutions.  He also told me to continue to check the forums.  Is there any progress to report?

 

Thanks,

~Casey

Newbie
Posts: 12
Registered: ‎06-23-2012

Re: Macbook Pro Link Speed 1.5G instead 3G

I've the same problem here, in my macbook pro late 2008 Smiley Sad

Just installed the 240Gb extreme... Really hope that you will solve this asap.

I chose sandisk insted of samsumg fot the good review i've read...I hope to not have to regret the choice...

SanDisk Guru
Posts: 4,548
Registered: ‎07-18-2007

Re: Macbook Pro Link Speed 1.5G instead 3G

No new information to report as of yet. 

Newbie
Posts: 12
Registered: ‎06-23-2012

Re: Macbook Pro Link Speed 1.5G instead 3G

I hope to have some news asap, couse i have 5 more days to get back my sandisk and buy somithing else....

Newbie
Posts: 3
Registered: ‎07-02-2012

Re: Macbook Pro Link Speed 1.5G instead 3G

[ Edited ]

Dear All,

I wonder if there is any solution to this problem. I have exactly this problem it says Speed Link is 3.0G but negotiated one is 1.5G. I have extreme 120GB disk and Lion 10.7.4 installed. If I knew this problem I would reconsider my purchase of this disk. I hope Sandisk engineers find a get around solution of this problem. Therefore I have Macbook pro 5,3 which is a mid 2009 unibody macbook pro.

Newbie
Posts: 12
Registered: ‎06-23-2012

Re: Macbook Pro Link Speed 1.5G instead 3G

OCZ and Samsung ssd work with Mac and Nvidia chips... OCZ have found a solutions weeks ago.

I really hope that Sandisk does the same quickly.

To be onest i'm a little disappointed that they did not say anything about this till now.

Italian customer care in first said that the problem is coused by Apple... after my replay they said that they was working to find a solution but they was not able to say how long it will take.

Maybe next time i'll buy a ssd i'll read more about it... or simply try another manufacter.