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Hey guys n gals!
Have a bit of a crazy one today, couldn't believe the answer myself when I saw it. Ok so last year I got a 240GB SSD from crucial. Formatted it to Mac journaled and used Carbon copy clone to clone my hard drive. I started up my macbook pro to test it by holding down the option key and using the new 240GB SSD to log-in to my Macbook pro. I then opened up my Macbook Pro and put it in. Started it up and still, all was well. I then used disk magic after the macbook was fully back together again and it showed read and write speeds of around 200mb/s. Not the fastest SSD but I was more than happy with it as my 5400RPM HDD that was in there before had around 50mb/s read and write.
This year I decided to get a 2nd hand iMac 2012 model. Inside is a 7200RPM hard drive. I bought a 960GB SSD from crucial (Was happy with my last purchase) and did exactly the same thing again. Formatted it to mac journaled and used Carbon Copy Clone to clone the hard drive. Now the manufacture is saying that the 960gb edition has roughly 400 write speeds and 500mb read speeds. So before I was going to open up my iMac with a hairdryer and replace the hard drive with the new SSD drive, I thought to myself "Lets give that disc magic program a quick run and see if it does the read and write speeds the manufactures are saying.
This is where it gets unsettling:
Mac 3,5" 7200RPM read and write speeds = 120MB/s
Crucial 960GB SSD read and write speeds = 20MB/s
Yes 20MB/s!!!!!!!!!!
I had to look twice myself when I saw it and was wondering why?
How? This is crazy!
Anyway, so I was looking online (Google) for some answers and found nothing. It seems no one has had this happen to them before. I was thinking maybe someone in Macforums has had or heard of this problem before.
I am wondering if it is because it is not connected with the main HDD connectors in iMac.
Is it maybe that the cable that is connected to the SSD is maybe USB 2.0?
I don't know if it is 2.0 but I'm just thinking out load here.
Or is it maybe that the SSD is defective? (I hope not)
Does this iMac start up faster than before? a little yes.
Does it copy and paste the same file on the desktop faster? No, it looks like 20mb/s copy & paste.
The shut down is quick also.
Programs start up faster than before? Yes they do.
So I hope this answers a few questions. It seems to behave like an SSD apart from when it comes to testing high read and write speeds
again, I don't know if this has to do with the fact that I used the option key to enter my mac sad rather than connect it to the main hard drive Sata 3 connection pieces inside the mac.
Any help on this situation would be greatly appreciated.
I don't have much time as I will send it back to amazon if I can't sort this out. It was expensive and I am not happy with 20MB/s read and write lol
I've included some disk magic pics below for comparison.
Many thanks in advance!
Have a bit of a crazy one today, couldn't believe the answer myself when I saw it. Ok so last year I got a 240GB SSD from crucial. Formatted it to Mac journaled and used Carbon copy clone to clone my hard drive. I started up my macbook pro to test it by holding down the option key and using the new 240GB SSD to log-in to my Macbook pro. I then opened up my Macbook Pro and put it in. Started it up and still, all was well. I then used disk magic after the macbook was fully back together again and it showed read and write speeds of around 200mb/s. Not the fastest SSD but I was more than happy with it as my 5400RPM HDD that was in there before had around 50mb/s read and write.
This year I decided to get a 2nd hand iMac 2012 model. Inside is a 7200RPM hard drive. I bought a 960GB SSD from crucial (Was happy with my last purchase) and did exactly the same thing again. Formatted it to mac journaled and used Carbon Copy Clone to clone the hard drive. Now the manufacture is saying that the 960gb edition has roughly 400 write speeds and 500mb read speeds. So before I was going to open up my iMac with a hairdryer and replace the hard drive with the new SSD drive, I thought to myself "Lets give that disc magic program a quick run and see if it does the read and write speeds the manufactures are saying.
This is where it gets unsettling:
Mac 3,5" 7200RPM read and write speeds = 120MB/s
Crucial 960GB SSD read and write speeds = 20MB/s
Yes 20MB/s!!!!!!!!!!
I had to look twice myself when I saw it and was wondering why?
How? This is crazy!
Anyway, so I was looking online (Google) for some answers and found nothing. It seems no one has had this happen to them before. I was thinking maybe someone in Macforums has had or heard of this problem before.
I am wondering if it is because it is not connected with the main HDD connectors in iMac.
Is it maybe that the cable that is connected to the SSD is maybe USB 2.0?
I don't know if it is 2.0 but I'm just thinking out load here.
Or is it maybe that the SSD is defective? (I hope not)
Does this iMac start up faster than before? a little yes.
Does it copy and paste the same file on the desktop faster? No, it looks like 20mb/s copy & paste.
The shut down is quick also.
Programs start up faster than before? Yes they do.
So I hope this answers a few questions. It seems to behave like an SSD apart from when it comes to testing high read and write speeds
again, I don't know if this has to do with the fact that I used the option key to enter my mac sad rather than connect it to the main hard drive Sata 3 connection pieces inside the mac.
Any help on this situation would be greatly appreciated.
I don't have much time as I will send it back to amazon if I can't sort this out. It was expensive and I am not happy with 20MB/s read and write lol
I've included some disk magic pics below for comparison.
Many thanks in advance!