![]() The problem that occurs with SSD is that each block on the drive has a limited number of write cycles it can withstand before failing so the SSD firmware tries to spread out the usage of blocks on the drive by a process called wear-levelling. Unfortunately, the SSD does not know the difference between erasing a block and writing over it with new data, so they are treated the same. On a mechanical hard drive this works fine and the space will get written over as needed. ![]() When you delete a file from a drive, the operating system marks the space used by the file as free so it can be used again. If the drive firmware supports TRIM (as all newer drives do) and the operating system supports the TRIM command, you will benefit from this feature. You do not need to run any UNIX (or any other) programs to 'TRIM' the drive. Anyone else have more knowledge about the state of the current SSD drives? Sorry, I've answered your question with more questions. Plus, are third-party SSDs covered under AppleCare? Probably not, so.there's no clear answer as I can see. Some have suggested buying it with the standard hard drive and putting in a third-party SSD on your own after LION is released, but even that's not ideal because we don't know whether TRIM support will be extended to third-party SSDs. Are these SSDs equipped to support the TRIM command should LION be installed? Is there some utility or other form of "garbage collection" in place RIGHT NOW? There seems to be a lot of disagreement as to how much degradation one might expect using an SSD without TRIM support, so I'm wary of purchasing it now. Since TRIM isn't supported by Snow Leopard, we know the SSDs wouldn't be getting "clean up" commands from the OS. I'm in your shoes (although looking for a replacement, not first purchase) and have similar questions. DISCLAIMER: Allyn is a good friend of mine and we have been collaborating on a piece about SSD performance in BootCamp on the MacBook Pro. If you want to read up on SSD technology, check out the articles by Allyn Malventano on PC Perspective (It's mainly a PC site, but the information is very good. I think we will know more once we figure out what drives Apple is shipping with the new MBP models. The Sandforce based SSD (like OWC) don't really need TRIM, but can use it where the Intel X25-M G2 drives benefit quite a bit from TRIM when it's supported by the operating system. I assume that OS X will eventually support TRIM (judging from articles I've read) and compatible drives will use it. Some of the drives (Intel X25-E) don't support TRIM at all, and the newer ones (OWC) support TRIM at the drive level but haven't ever used it since OS X doesn't currently support it. I've been using SSD in my macs for a few years now and had no issues. TRIM has definitely proven to be beneficial with certain drives, but many of the newer ones work fine without it. You could also open up the case and see what type of SSD is in there and then check the manufacturer specs for it.Īt any rate, I wouldn't worry too much about TRIM support at this time. This could be done with Windows 7, but might not be something you are willing or able to do. I think the only way to tell right now is to install a TRIM enabled operating system on your new SSD.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |