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How do MBAs SSD sustain itself with no TRIM?
- Thread starter kkel19
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Man your an idiot. I saw your post on the Apple forums too. Saying the same things. You have no idea how an SSD works do you? Go to Anandtech.com and do some research. TRIM is needed for every system. That's why its coming to Macs. You need a way to handle garbage collection and fragmented files and thats what trim does.
Though this is useless on this forum since most of you guys will say Mac's don't need Defrag on Mechanical drives, it's the same point.
Thats what happens at first but of course data is deleted at some point when its space is needed.
It's interesting that you feel free to call people someone you don't know an idiot when you are so obviously wrong.
Here is what Anand says about TRIM and MBA
"As I mentioned earlier, resilience is very important as OS X still doesn’t support TRIM. I filled the drive with garbage and then tortured it for 20 minutes with random writes. The resulting performance drop was noticeable, but not unbearable. A single pass of sequential writes restores performance to normal. This tells us two things. First, through normal use the drive should be able to recover its performance over time (assuming you give it enough spare area). And second, if there’s any idle garbage collection in Apple’s custom firmware for the Toshiba controller it should be able to keep the drive running at peak performance even without TRIM supported in the OS. I don’t have a good way of measuring whether or not there’s GC enabled on the drive in OS X, but I suspect Apple is (at least it appears to be doing so on the Mac Pro’s SSDs). Overall I’m pleased with Apple’s SSD selection. It could’ve been a lot better but it could’ve been a lot worse. The MacBook Airs in their default configuration have better IO performance than any other standard config Mac sold on the market today, including the Mac Pro."
You are also wrong about defragging.
Here is what Anand says about TRIM and MBA
"As I mentioned earlier, resilience is very important as OS X still doesn’t support TRIM. I filled the drive with garbage and then tortured it for 20 minutes with random writes. The resulting performance drop was noticeable, but not unbearable. A single pass of sequential writes restores performance to normal. This tells us two things. First, through normal use the drive should be able to recover its performance over time (assuming you give it enough spare area). And second, if there’s any idle garbage collection in Apple’s custom firmware for the Toshiba controller it should be able to keep the drive running at peak performance even without TRIM supported in the OS. I don’t have a good way of measuring whether or not there’s GC enabled on the drive in OS X, but I suspect Apple is (at least it appears to be doing so on the Mac Pro’s SSDs). Overall I’m pleased with Apple’s SSD selection. It could’ve been a lot better but it could’ve been a lot worse. The MacBook Airs in their default configuration have better IO performance than any other standard config Mac sold on the market today, including the Mac Pro."
You are also wrong about defragging.
Trim is here now ...
I just installed the TRIM utility noted above on my MBAir 11". Easy and no worries. In the system info under the SATA area, it shows that TRIM is now turned on. Just follow the instructions, erase the free space, and perform the cleanup.
I just installed the TRIM utility noted above on my MBAir 11". Easy and no worries. In the system info under the SATA area, it shows that TRIM is now turned on. Just follow the instructions, erase the free space, and perform the cleanup.
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The 2010 MBA has trim support. OSX had trim support, but only for the current "apple" SSDs for various reasons. The utility in the mac pro forum allows one to use Trim for other SSDs before it's officially supported in MacOS (lion).
RDRoe said:
The 2010 MBA has trim support. OSX had trim support, but only for the current "apple" SSDs for various reasons. The utility in the mac pro forum allows one to use Trim for other SSDs before it's officially supported in MacOS (lion).
That's not entirely true. Apple activated TRIM in the 2011 MacBook Pros. However, older Macs, even those with SSDs that supported TRIM, did not get TRIM activated, even in 10.6.7. The utility in the Mac Pro forum activates TRIM for either Apple or non-Apple SSDs.
Yep in my 2010 MBA it still say "No" to TRIM in the system info. I'm not exactly eager to use the TRIM Enabler since it is only a beta and I don't know what possibly could go wrong.
And after what I read here, it's not really needed anyway so no worries. I only hope, Apple is activating TRIM in Lion for alle Apple SSDs. Just to give me a good feeling because I know that TRIM works now, I probably wouldn't notice any improvement anyway.
And after what I read here, it's not really needed anyway so no worries. I only hope, Apple is activating TRIM in Lion for alle Apple SSDs. Just to give me a good feeling because I know that TRIM works now, I probably wouldn't notice any improvement anyway.
Typical comment from a Mac Noob who thinks Unix based OSx is the perfect of all perfect operation systems
Your comment is total bull and rubbish and you just have to be naive Mac noob to say stuff like this
SSD - no matter what OS you use, will degrade speed wise over time because of how its made if you don't use TRIM or the drive has a proper garbage collection.
Once you format the SSD drive, it will revert back to the old speed it used to have. This is not something a unique special Unix based Mac OS can do anything about
Fragmentation is an entirely different thing - you're talking about apples and oranges
Rubbish - the Flash drive on the MacBook Air has an excellent garbage collection, and supports TRIM, which is why the drive does not degrade speed wise over time.
THIS HAS NOTHING TO DO WITH THE UNIX BASED MAC OSX - NOTHING !!
So on my 2010 MBA that doesn't have TRIM enabled atm, should I just leave it on and "idling" to allow this garbage collection process to occur? I normally just close the lid when I'm done using it. Is there a way to force the GC? Thanks.
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Macbook Airs were originally released in January 2008. They have had SSD in them the entire time.
Where were all the people complaining about TRIM back then?
Where were all the people complaining about TRIM back then?
The three people who could afford the $1200 64gb SSD option had no idea what TRIM was.
Need to? No. But theres really no reason not to (assuming it is actively working, I don't know if anyone ever confirmed it is actively working by enabling it with the change or not)
I cant address the question, but Id thought Id share a free PDF guide I just downloaded, titled Your Guide to Solid State Drives. Hope its okay to post links to resources like this on MacRumors.
You're one of the lucky ones who got an Ultimate with the superior Samsung drive. The first run all came with the 10-15% slower Toshiba drive. Yours also supports NCQ, which is helpful when the drive is peppered with multiple requests (although the benefit should be smaller in SSD vs HD.)