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Barney63

macrumors 6502a
Original poster
Jan 9, 2014
799
1
Bolton, UK.
Does anybody know the expected lifespan of the SM and SD 256GB SSDs?
Say with about 170GB of data and home use.

Barney
 

Bear

macrumors G3
Jul 23, 2002
8,088
4
Sol III - Terra
Does anybody know the expected lifespan of the SM and SD 256GB SSDs?
Say with about 170GB of data and home use.

Barney
What do you mean by 170GB? Is that how full you expect the disk to be? If that's the case, I'd recommend 512GB if you're planning on keeping the system more than a year or 2. Remember you need to keep 10 to 20% of your system disk free for best performance.
 

DeltaMac

macrumors G5
Jul 30, 2003
12,502
3,837
Delaware
Exactly…
In a year or two, you will have more!
The extra space will be nice to have now, and later, you will likely use it.
 

Barney63

macrumors 6502a
Original poster
Jan 9, 2014
799
1
Bolton, UK.
I also have 2TB of external storage so the size of the SSD isn't critical.
The point of the thread was the how long the drive will physically last ie the number of read/write cycles.
I had seen some reports somewhere suggesting that some would only last a couple of years.

Barney
 

alphaod

macrumors Core
Feb 9, 2008
22,182
1,240
NYC
I also have 2TB of external storage so the size of the SSD isn't critical.
The point of the thread was the how long the drive will physically last ie the number of read/write cycles.
I had seen some reports somewhere suggesting that some would only last a couple of years.

Barney

I don't think you should worry. It will last a long time.
 

yjchua95

macrumors 604
Apr 23, 2011
6,725
231
GVA, KUL, MEL (current), ZQN
6 months...just get samsung. evo.

Dumbest statement I've ever seen.

The SM0256F is basically a Samsung XP941, utilizing MLC NAND like the 840 Pro.

So an Evo will not last longer than a Pro/XP941, because the Evo uses the less durable TLC NAND.

http://www.anandtech.com/show/6459/samsung-ssd-840-testing-the-endurance-of-tlc-nand

Scroll down to the SSD Lifespan Estimation table, and you'll see that the Evo (TLC) lasts significantly less than the Pro (MLC).

My iMac, on light usage (web surfing, iTunes, posting in the MR forums and a short 10 minute session on Windows 8.1 in VMware) has written 22GB already (2h 30m since boot).
 

koban4max

macrumors 68000
Aug 23, 2011
1,582
0
Dumbest statement I've ever seen.

The SM0256F is basically a Samsung XP941, utilizing MLC NAND like the 840 Pro.

So an Evo will not last longer than a Pro/XP941, because the Evo uses the less durable TLC NAND.

http://www.anandtech.com/show/6459/samsung-ssd-840-testing-the-endurance-of-tlc-nand

Scroll down to the SSD Lifespan Estimation table, and you'll see that the Evo (TLC) lasts significantly less than the Pro (MLC).

My iMac, on light usage (web surfing, iTunes, posting in the MR forums and a short 10 minute session on Windows 8.1 in VMware) has written 22GB already (2h 30m since boot).

Depending how you use it...sure 6 months could happen.
 

Freyqq

macrumors 601
Dec 13, 2004
4,038
181
It will probably last longer than the life of the other parts of the computer. The read/write cycles for an 840 pro are very high.
 

Fishrrman

macrumors Penryn
Feb 20, 2009
25,277
10,318
ionjohn says it exactly right in the post above.

Just use the SSD and keep it properly backed up.

It will last as long as it lasts.

At some point, it will fail -- as all spinning hard drives eventually fail. When that happens, buy a replacement (they're getting cheaper all the time), restore from your backup, and change drives (assuming the drive can be swapped out).
 

UBS28

macrumors 68030
Oct 2, 2012
2,893
2,330
Dumbest statement I've ever seen.

The SM0256F is basically a Samsung XP941, utilizing MLC NAND like the 840 Pro.

So an Evo will not last longer than a Pro/XP941, because the Evo uses the less durable TLC NAND.
http://www.anandtech.com/show/6459/samsung-ssd-840-testing-the-endurance-of-tlc-nand

Scroll down to the SSD Lifespan Estimation table, and you'll see that the Evo (TLC) lasts significantly less than the Pro (MLC).

My iMac, on light usage (web surfing, iTunes, posting in the MR forums and a short 10 minute session on Windows 8.1 in VMware) has written 22GB already (2h 30m since boot).

I would go for the EVO since you can get a higher capacity SSD which counters the durability of the 840 Pro. If you buy the 1 TB 840 EVO, you get amazing storage with amazing reliability.

A small capacity SSD with TLC is asking for trouble of course. But Samsung got great warranty based on my experience :p
 
Last edited:

imorton

macrumors 6502
Aug 21, 2010
275
22
I see that my "home use" writes about 40Gig a day, so that works out to @ 14 Terrabytes a year.

I don't know how much "write lifespan" a 250Gb 840 EVO has, hopefully someone can reply, and we'll be able to get a reasonable idea how long a 40Gig write a day will last?

Thanks for any replies.
 

Barney63

macrumors 6502a
Original poster
Jan 9, 2014
799
1
Bolton, UK.
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