SLC vs MLC SSDs

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apisorder

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Jun 19, 2012
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I used to think high-end, enterprise-level SSDs are made from SLC instead of MLC, because SLC offers greater endurance.

Why then does Intel 750 use MLC? Is my understanding that SLC offers greater endurance wrong?

Thanks.
 
Solution
kanewolf
Cost. SLC is limited in capacity. 60GB SSDs have no market. 1TB (MLC, or eMLC) SSDs do. Vendors have started advertising the write endurance of SSDs as DWD (disk writes / day). The advertised values are 1 to 3 DWD. So a 1TB disk is guaranteed by the vendor to meet the life expectancy (usually 5 years) with 1 to 3 TB / day written to that disk. Actual endurance is usually better than advertised.
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kanewolf

kanewolf

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May 29, 2013
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Cost. SLC is limited in capacity. 60GB SSDs have no market. 1TB (MLC, or eMLC) SSDs do. Vendors have started advertising the write endurance of SSDs as DWD (disk writes / day). The advertised values are 1 to 3 DWD. So a 1TB disk is guaranteed by the vendor to meet the life expectancy (usually 5 years) with 1 to 3 TB / day written to that disk. Actual endurance is usually better than advertised.
 
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