@ all:
For those of you, who do not know what "Hot Spare" is, here is the explanation done by Wikipedia:

Zitat von Wikipedia

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A hot spare or hot standby is used as a failover mechanism to provide reliability in system configurations. The hot spare is active and connected as part of a working system. When a key component fails, the hot spare is switched into operation. More generally, a hot standby can be used to refer to any device or system that is held in readiness to overcome an otherwise significant start-up delay.

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@ jonnyz2:
Welcome at Win-RAID Forum!

Zitat von jonnyz2 im Beitrag #1

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I'm trying to figure out whether I can have a hot spare with RST. I cannot find "hot spare" in Intel's official documentation

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Zitat

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Does anyone know whether RSTe can be used with a z87 chipset (Asrock z87 extreme6 mobo).

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AFAIK all actual Intel chipsets are compatible with Intel's RSTe drivers v3.x.x.xxxx, if the related HadwareIDs have been added to the INF file, but I doubt, that the use of an Intel RSTe driver will give you the special "Enterprise" features like "Hot Spare".

Zitat

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Are there any advantages to using RST instead of RSTe?

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Usually the RST drivers will give your RAID system a better performance.

Regards
Fernando

@ jonnyz2:
The functionality of the RST drivers from v11.5.x.xxxx up is rather similar to the functionality of the RST drivers v3.x.x.xxxx, because both driver series are able to address the HDDs/SSDs as SCSI devices by using an additional SCSI filter driver.
So it was not a big surprise for me, that I was able to successfully replace the RST driver of my Z68 and Z77 Chipset systems by an RSTe driver version.
By the way: Many Intel X79 Chipset RAID users prefer to use a modded RST(e) driver v12.x.x.xxxx instead of the original RSTe v3.x.x.xxxx one, because they get better benchmark results.

Zitat von jonnyz2 im Beitrag #3

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Zitat von Fernando

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AFAIK all actual Intel chipsets are compatible with Intel's RSTe drivers v3.x.x.xxxx, if the related HadwareIDs have been added to the INF file, but I doubt, that the use of an Intel RSTe driver will give you the special "Enterprise" features like "Hot Spare".

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Is your point that the driver might work but that the full software capability may not actually be available?

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Yes, that is what I wanted to say. It seems rather unlikely for me, that the use of an RSTe driver instead of an RST one will give an Intel 8-Series Chipset SATA RAID Controller the capability to support all RST "Enterprise Edition" features.