Fusion Drive Longevity?

An SSD naturally will lose its performance over time, so I don't see why this would be any different. I don't think it has been on the market long enough for anyone to draw any conclusions. But I would guess that over a few years that its performance would degrade like any SSD, and with heavy usage, much sooner.

 

Well, SSDs haven't been around as long as hard drives, so there's no "real world" data of constant use for years.
Having said that, modern SSDs are a lot more robust than their earlier counterparts, so the days of counting every precious write are over.

Most importantly: you should expect any storage device -- mechanical hard drive, solid state disk, tape drive -- to fail, and be prepared to migrate to new hardware at some point in the future.

Backup early, and backup often.

 

i dont know enough about this asuume a mechanical spinning disc will suffer before the ssd?

 

I totally agree with this statement. I have owned my iMac since January, and it's the quietest computer I've ever owned. As far as the longevity of the Fusion drive, only time will tell...but you should have a good backup plan no matter what. I use CrashPlan.

 

No matter the manufacturer, there is one type of hard drive made, the one that will fail.

Here is what Google LLC has to say regarding hard disk drive longevity. You may also readily find data regarding life expectancy on SSD product.

Failure Trends in a Large Disk Drive Population

The long and short of it is this, backup your data as all drives fail. It is hardware. It fails. You replace it and move on with life; then you fail.

Another way to look at it, the Fusion is basically a RAID 0 drive. I tell individuals considering RAID 0 that they are out of their minds; yet, here I am using a computer, loving the experience, of what is basically a RAID 0 system.

. . . . that is backing itself up on an hourly basis (TimeMachine) and having full clone imaging done on a somewhat regular manual basis via CCC.

This Apple environment, it is a Zebra of a different stripe than Microsoft.

 

I agree Backup no mater what you choose...

Fusion is untested but not more likely to fail than SSD or HDD. As for performance I guess in a couple of years if it does drop off noticeably then it might be advisable to replace the SSD and maybe upgrade the HDD while the screen is off. I do wonder about resale value though, with SSDs loosing performance over time would you get a used 2012 iMac in 3 years when the Applecare has ended?

 

Like SSD, they are too new for real world results.

 

If you can point me to where I can download some empirical data about HDD failures (or to a probabilistic model of the disk life expectancy) I can run some naive simulations on life expectancy of a system that consists of two disks

 

I trust that Apple is convinced of Fusion durability & MTBF.

 

There's also a saying that you should not waste your time worrying about things that might or might not happen. Like all things in life, prepare for outcomes (in this case - backup and purchase apple care), and then deal with it when if something happens.

 

If it fails after 10 minutes of use.. Call a Genius!
If you're afraid of long term risks. Get the AppleCare, it will make sure your Mac taken care of any manufacturing defects for 3 years.

Beyond that, a 4 or 5 years old computer is pretty much on its last legs. You wouldn't bother if it failed or degraded. Before that happens, back up! Yes I'm saying it again. Back up.

It's that simple, or you're the kind of guy of keeping the same computer hardware for 10 years?
Well it's a computer, not a housewife.

 

I wouldn't say a 4 year old computer is on its last legs, depending on use, it may very well be fine. You can easily buy a 2009 iMac and use it for everyday email, web, photo management and office tasks without any issue what so ever.

So long as you keep a good combination back up, such as time machine, cloned drive (weekly or monthly) and an online back up, you have little worry of lost data in the case of a failure.

Most SSD's are predicted to last heavy writes for more than 10 years, much heavier than the average user. Honestly I think people are needlessly worrying about these things.

 

What happens if one drive fails?

 

The same thing as happens when your single hard disk fails.

You replace the faulty hardware, and restore from your backup.

You do keep a backup, don't you?

 

Comments about backup are always good to repeat.
I agree. Fusion is yet another in the world of compromise, young and not proven. It should be obvious that 128gb for 3 times the market price is another way to profit.

A few friends joked that Apple was Fusing our wallets to their profit margins with a little software trick. I agree, but some would argue it's helping people along who don't want to be bothered with the details. Apple is counting on that little point.

The so called "Longevity" is still down to one or the other drive failures. So what's changed? Software?

The OP's question can only answered by Apple. Good Luck with that.