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FAST CACHE, EFD and FAST VP EFD
Hi,
when I look at the options for SSD drives in the VNXe3200 I have three options:
1:VNXe 3200 100GB FAST CACHE 25X2.5
2:VNXe 3200 100GB EFD 25X2.5
3:VNXe 3200 100GB FAST VP EFD 25X2.5
Well FAST Cache is a FAST Cache drive but why choose EFD or FAST VP EFD.
Can I use the EFD type in a FAST VP pool? or should I use EFD for some extra performance as I guess the FAST VP EFD is a eMLC and EFD is a SLC?
Regards,
John Grinwis
The FAST VP version is the only one with FX in it's SKU(V6-2S6FX-100), the FAST CACHE and EFD only have the F.
So FAST CACHE and EFD's are SLC's and FAST VP an eMLC as expected.
So maybe for some dedicated set of spindles you could use the EFD SLC version, I would't use them in a FAST VP pool.
brettesinclair
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Posted March 5th, 2015 14:00
I was only aware of the 2 x types; FAST VP (eMLC) and FAST CACHE (SLC).
Going by part numbers, the eMLC will have "FX" included. Does the "2." option have a SKU/Part# ?
FAST CACHE efd's can be used as FAST VP drives also, but being more expensive than the FX/eMLC drives, not sure why anyone would, unless cache hits were that low that an Extreme Perf tier in a pool was expected to be better.
Also remember they will not spare for each other.