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Prevent SSD wear by using a RAM disk for cache
Authored by: stottm on Jan 04, '11 09:06:07AM

Modern SSD drives from Intel and anything with a SandForce controller (OCZ / OWC) no longer have the performance penalty over time. TRIM support is no longer required in the OS.

That being said, yes, you have fewer writes than you might with a traditional hard disk but the SSD should last 3-4 years for 90% of the folks out there. Some of these newer SSD's have a model meant for RAID which will stress the writes further. The SSD's for RAID are more expensive.

http://www.anandtech.com/show/2899/8 -> Lot's of detail in this review.

That being said, on a Mac, I moved my user folder to a traditional disk and keep the boot volume and applications plus my VM images on the SSD drive. I also clone the SSD weekly as I had one fail suddenly and without warning. It was warranty replaced, but all data was lost instantly!



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Prevent SSD wear by using a RAM disk for cache
Authored by: S Barman on Jan 04, '11 11:28:13AM

The problem is not that SSDs have a performance penalty. SSDs will FAIL after a number of I/O operations. SSDs, along with all non-volitile RAM have a limited number of reads and writes before the gates within the chip lose their capacitance and stop holding the charge. The key is to limit the number of reads and writes to any NV-type RAM to extend its life.



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Prevent SSD wear by using a RAM disk for cache
Authored by: klklkl on Jan 04, '11 06:07:53PM

In case of flash, number of reads/writes is practically infinite, only number of erase cycles is limited. You erase a cell, then write data to it until it's full. Reading doesn't wear it.



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