Recommend a vSAN all flash cache drive?

seang86s

Member
Feb 19, 2013
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Hi everyone. I'm looking for four vSAN cache drives for my cluster but I'm having trouble finding something affordable. Optane p4801x is too expensive. I have 4 nodes with 6 SATA SSDs (Samsung 960 Gig) each. I'm looking to run ESXi 7.0u2 or higher. Its doesn't have to certified as this is a homelab setup but I am looking for something reliable. Would like to get several years out of them. Looking for M.2 format. Used on eBay to save a few bucks is acceptable too.
 

i386

Well-Known Member
Mar 18, 2016
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Is m.2 a hard requirement?
What's the budget?

If you don't mind pcie addon cards check the bay for radian rms-200. (I bought 3 pieces for under 100€/120% each :D)
 

Rand__

Well-Known Member
Mar 6, 2014
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900p U2 with adapter?

O/c it depends on how many processes/users you run... for fewer Optane is best, for higher numbers most nvme should scale fine. Dont use consumer drives unless your dataset is limited in size (does fit into cache).

Don't expect wonders with Optane either, when that's full performance will tank (my tests, mabye you have more luck)
 

nev_neo

Active Member
Jul 31, 2013
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Is m.2 a hard requirement?
What's the budget?

If you don't mind pcie addon cards check the bay for radian rms-200. (I bought 3 pieces for under 100€/120% each :D)
RE the radian RMS-200, have you used it as a vsan cache ? I've been looking and could not find any instance of these being used with vmware.
 

DavidRa

Infrastructure Architect
Aug 3, 2015
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Intel P3605 cards are PCIe and would be one I'd consider if m.2 isn't a hard requirement, though at a couple hundred each for 1.6TB they're not cheap. I do think it's a reasonably good value option, though.
 

i386

Well-Known Member
Mar 18, 2016
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RE the radian RMS-200, have you used it as a vsan cache ? I've been looking and could not find any instance of these being used with vmware.
I didn't try them with vsan.They are "vanilla" nvme devices though and should work without problems in esxi/vsan.
 

Propaganda

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Dec 6, 2017
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Are you worried about using sata drives? I heard of issues with using onboard controllers and sata drives so i went full sas on my vsan.