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SSD Problems
- Thread starter BradHatter
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As an FYI you could probably order a new controller card for the hybrid because that would have a new SSD on it. For most drives replacing them is about a 3-5 minute job once the drive is out of the computer.
I'm replying to myself because I just found this out: the PCI connectors on the new MacBook Pro's is Apple unique, which means that other stuff, unless someone else starts making it for them, won't work. Apparently it's a common interface, just an odd connector.
I doubt it. It's strictly for laptops and the space in a MacBook Pro, at least a 13" unit, is tight already. Who would be interested in making such a thing anyway?
It seems to be kind of difficult getting any detailed answers about the PCI interface on the Macs. Maybe I'm just looking in the wrong places, but seems it's either something people don't know about or they're just not interested in pursuing the topic.
Out of curiosity I did a web search for adapters. There are surprisingly (at least to me) quite a few sources:
http://www.microsatacables.com/drive-adapters-and-drive-converters/apple-ssd-adapter
http://www.pc-adapter.net/categories/0/0/57/1.html
There are others. Search term was "PCI to SATA adapter MacBook Pro" so I'm guessing if they aren't available they soon will be.
http://www.microsatacables.com/drive-adapters-and-drive-converters/apple-ssd-adapter
http://www.pc-adapter.net/categories/0/0/57/1.html
There are others. Search term was "PCI to SATA adapter MacBook Pro" so I'm guessing if they aren't available they soon will be.
Be careful when reading that stuff to make sure you have the exact model numbers. Most of those are for MacBook Air's or older MacBook Pro's. I checked with OWC because I thought that if anyone had something like that, they would, but I couldn't find it.
Availability of some type of adapter will probably depend on whether or not the PCI based SSD is a a "one-off" unique to that model or whether it becomes a new Apple standard for all units. If it's a one-off don't hold your breath waiting for anyone to develop anything for it.
A bad sector on any hd wether its an ssd or a mechanical driven hd can be caused by bad software most often corrupted data from such bad software, its kinda hard or easy to pinpoint the problem, and sometimes several format passes are required for the controller to reallocate all the bad sector and whatever is severely damaged goes to what I like to call the RIP section lol its a part of the hard drive thats kinda like a cemetery where the dead sectors reside something that most programs wont show unless you are the manufacturer or an IT PRO and your company owns the costly program you will see it.
Thats the best laugh I've had in ages. If you don't know how something works please don't make stuff like that up, hilarious though it is.
What you dont believe me I can assure you that if you get the software and you look very closely like over to the right you will see a little church and next to it a little mortuary and if somehow you can take a peek behind them two you can spot the little graveyard where all the dead sectors lay to rest (SARCASM) works in many ways sometimes my friend glad you got to laugh and of course that is the way this works and Im gonna write it in whatever forums I go to, spread the word bird. Thanks and geek on.
It's normal for a fair number of blocks on an SSD to be mapped out over time. It's not unusual for an HDD in good working order to normally lose a few during it's life and have them get re-mapped. It's not normal for an HDD to suddenly lose hundreds or thousands of blocks in an instant - usually a head crash.
If an SSD starts losing blocks rapidly it means its on its last legs. The SSD endurance test, which I'm sure is referenced in one of these posts always started losing blocks rapidly before death.
Here's the link to the SSD test summary:
http://techreport.com/review/27909/the-ssd-endurance-experiment-theyre-all-dead/4
Symptoms of death:
1. Data corruption starts occurring.
2. Blocks start getting rampantly re-allocated/replaced
3. At time of death, some will become read-only, others won't function at all
4. Sudden power loss to the drive can definitely cause problems.
Previously this link talked about SSDs having problems with power outages:
https://www.usenix.org/system/files/conference/fast13/fast13-final80.pdf
If you read the summary in the first link, one of their SSDs had a sudden power loss as described in the link above, and it developed problems. It's two different sets of data and tests performed independently of one another with similar results, so apparently that is a real potential problem.
That's a really good observation. Fortunately most laptops won't suffer that problems because the power shouldn't drop like that but desktop users need to be cautionary with SSDs it seems.
Some SSD makers are supposedly putting super capacitors on them so they won't lose data like described in the sudden power loss article.
Micron and Crucial are doing that. As far as I'm concerned it's proof that the sudden power loss problem is real, otherwise they wouldn't do it.
I've also noticed that data corruption seems to become a problem on cells/blocks that are either going bad or are bad. I've seen that mentioned twice.
