Black Magic Disk Speed Test

Yes, but do note that Black Magic Disk Speed Test has been giving incorrect results based on its feedback and my own general use of it.

 

You can also use the following applications to benchmark the speed of your HDD / SSD:

• AJA System Test
  
• Xbench

Normally modern 2.5" HDDs get 70 to 100 MB/s read and write speed.

 

Age, limits of technology at the time, damaged cable, failing hard drive, heat damaged hard drive (130F+), bad controller, poorly written controller drivers, bad drive firmware

 

As already noted, BMST sometimes reports inaccurate numbers.
To confirm, that you have a slow HDD, first use the two other applications linked to in post #2 to verify the numbers BMST gave you and then open System Report > Hardware > Serial ATA > to find out your HDD model.

​

 

haha, just remembering the pains i went through with my micropolis scsi UW... had a muffin fan on top of it so it would not set fire to itself. all for.. i think, 23meg/s max. ahhh, memories.

 

Post #3 and #6. And as mentioned, modern HDDs offer 70 to 100 MB/s, depending on model (post #6). Most of my 500 GB HDDs are 5,400 RPM models and get 75 MB/s via a direct S-ATA connection, my Momentus 7200.4 has 7,200 RPM and gets 95 to 105 MB/s.

 

Why doesnt AJA let me benchmark my native rMBP SSD or any installed HDD/SSD on my 13" MBP, only external drives?

 

Which will probably be a 5,400 RPM drive, thus a speed of 70 MB/s should be alright. Maybe those other two applications I linked to can verify that. Or the exact model number and a quick www search for benchmarks of that drive can do that too. Or not.

That seems to be a bug, as I sometimes have the same problem, though restarts seem to fix that, sometimes. Btw, I am using 10.6.8 on both my Macs with both having an SSD and one having an additional HDD.

 

Do a "Get Info" on your installed drive, then, at the bottom, unlock and add yourself to the list, making yourself read/write capable. Then try the test again and it should work.



-howard

 

just did, even rebooted and it didnt work

 

Different parts of your HD are going to be faster or slower than others.



80-40MB/s depending on whether you are using the inside or outside of the drive.

 

Works for me. No reboot needed. You can also open app as root:
Navigate to directory of Aja app and:

sudo AJA\ System\ Test.app/Contents/MacOS/AJA\ System\ Test &

 

Same thing, doesnt let me run the native SSD

 

Hmmmm ... that is very strange. This has worked for every system that I have wanted to run the AJA disk test on the built-in system drive.

If, after setting your permissions for the drive, you again select to view the drive info on that drive ... do you still see your login name with read & write permissions in the sharing/Permissions table at the bottom. It may also say "you have custom access" just above the table.


-howard

 

My 2009 MB has a 500GB 5400RPM drive and yes it does achieve around 75 MB/s, my problem is that my 2011 27" iMac 1TB@ 7200RPM is getting between 65-80 MB/s I can't find any helpful information on the topic so far. any thoughts?

 

Move the app

AJA must be run from a drive other than the one being measured. Does that help?

 

Buy an SSD to speed it up.

Problem solved.