[clug] Intel 82801 SATA RAID controller opinions?

Stephen Granger sgranger at stepsoft.com.au
Tue Mar 1 01:01:55 GMT 2005

Just remember most SATA RAID controllers aren't actually real hardware 
raid controllers. The hardware raid is done through the bios the 
controller, which in most cases doesn't do a really good job, i.e. linux 
doesn't see it as a mirrored device and you can have all sorts of troubles.
Google-ing around brought me to this conclusion after trying to get two 
160GB drives setup as one mirrored device. I just setup it up with lvm 
and now have a 300GB (sweet!) partition, not a redundant service though 
it's only for play.
I think (from memory) that only one SATA RAID card works under linux, I 
don't remember which one, could be yours ! :). It also suggested that 
linux software raid is greatly advanced and gives excellect/comparable 


Antti.Roppola at brs.gov.au wrote:
> So,
> Does anybody have an opinion on the Intel 82801ER (ICH5R) SATA RAID controller?
>>From what I can see, it involves patching kernel source and you get a software
> RAID controller that doesn't appear to be much different to using md.
> Viz, is there any advantage in using this instead of software RAID?
> Antti
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