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idata
Community Manager
2,649 Views

New X25-M G2 only reading at 123 MB/s

Just got my second X25-M and am surprised to see this sample only reads at 123 MB/s (model SSDSA2M080G2GN, firmware 2CV102G9). Writes are normal at ~ 70 MB/s. System is 2008 Mac Pro, 10.6.2. My first sample reads at >250 MB/s in the same system so I'm assuming the issue is with the X25-M, not the system.

Any advice?

Thanks!

8 Replies
idata
Community Manager
133 Views

Apple limits the SATA to 1.5GHz in the MacBook Pro instead of 3.0GHz, which would limit you to about that 123MB/s. (Not sure about 2008 Mac Pro), see here: http://www.anandtech.com/mac/showdoc.aspx?i=3672&p=5 http://www.anandtech.com/mac/showdoc.aspx?i=3672&p=5

Are your 2 drives on SATA ports connected to the same controller, or is one on an NVidia controller and one on a Marvell or something? Maybe Apple limited some controllers and not others?

idata
Community Manager
133 Views

Thanks for your reply. My system is a Mac Pro tower with 4 x 3.0 GB/s internal SATA II ports.

I did swap the two X25-Ms into the drive bay and tested read speeds to get the 123 MB/s and >250 MB/s results.

idata
Community Manager
133 Views

Just got off the phone with Intel SSD Tech support. They agree it must be the drive, not my system and agree I should just replace it via RAM from the reseller (mwave.com) who are sending me a replacement as a cross shipment.

idata
Community Manager
133 Views

OHH Damn!! - I ordered a X25-M G2 from mwave just last night for my brand new iMac 27" which is definitely SATA II and running at 3Gb/s as compared to any other macs. It'll totally suck if there's a problem with the drive an running at half the speeds after it's installed. We all know that the installation of a HDD/SSD in an iMac is quite cumbersome.

idata
Community Manager
133 Views

This is after a month of use.

Results 243.04 System Info Xbench Version 1.3 System Version 10.6.2 (10C540) Physical RAM 6144 MB Model MacPro3,1 Drive Type INTEL SSDSA2M080G2GC Disk Test 243.04 Sequential 152.50 Uncached Write 139.77 85.82 MB/sec [4K blocks] Uncached Write 83.81 47.42 MB/sec [256K blocks] Uncached Read 198.11 57.98 MB/sec [4K blocks] Uncached Read 477.31 239.89 MB/sec [256K blocks] Random 598.11 Uncached Write 683.33 72.34 MB/sec [4K blocks] Uncached Write 253.51 81.16 MB/sec [256K blocks] Uncached Read 2658.48 18.84 MB/sec [4K blocks] Uncached Read 1106.81 205.38 MB/sec [256K blocks]
idata
Community Manager
133 Views

Here are my stats, 17 inch unibody 2009 Macbook Pro running OSx and Ubuntu. 80 GB split between the two and running for 2 months. 68GB available on OSx Drive.

Results 306.80

 

System Info

 

Xbench Version 1.3

 

System Version 10.6.2 (10C540)

 

Physical RAM 6144 MB

 

Model MacBookPro5,2

 

Drive Type INTEL SSDSA2M160G2GC

 

Disk Test 306.80

 

Sequential 197.15

 

Uncached Write 175.07 107.49 MB/sec [4K blocks]

 

Uncached Write 161.69 91.48 MB/sec [256K blocks]

 

Uncached Read 162.45 47.54 MB/sec [4K blocks]

 

Uncached Read 447.07 224.69 MB/sec [256K blocks]

 

Random 691.29

 

Uncached Write 781.78 82.76 MB/sec [4K blocks]

 

Uncached Write 324.28 103.81 MB/sec [256K blocks]

 

Uncached Read 2138.16 15.15 MB/sec [4K blocks]

 

Uncached Read 1046.44 194.17 MB/sec [256K blocks]
idata
Community Manager
133 Views

I have an old MacBookPro 2,2 (late 2006). I've installed my new G2 160GB. Here is my xbench result. Is the 1.5GHz limit affecting me or there is a problem with the drive?

System Info

Xbench Version 1.3

System Version 10.6.2 (10C540)

Physical RAM 3072 MB

Model MacBookPro2,2

Drive Type INTEL SSDSA2M160G2GC

Disk Test 221.34

Sequential 138.38

Uncached Write 145.26 89.19 MB/sec [4K blocks]

Uncached Write 147.58 83.50 MB/sec [256K blocks]

Uncached Read 89.43 26.17 MB/sec [4K blocks]

Uncached Read 246.10 123.69 MB/sec [256K blocks]

Random 552.70

Uncached Write 673.78 71.33 MB/sec [4K blocks]

Uncached Write 275.01 88.04 MB/sec [256K blocks]

Uncached Read 1922.58 13.62 MB/sec [4K blocks]

Uncached Read 626.27 116.21 MB/sec [256K blocks]

idata
Community Manager
133 Views

2006 model is 1.5, not 3.0, so the numbers you are getting look right.

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