[clug] Intel 82801 SATA RAID controller opinions?

[Stephen Granger]

Hi
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 
performance.

Steve

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
> 
> ---------------------------------------------------------------------- 
> IMPORTANT - This message has been issued by The Department of Agriculture, Fisheries and Forestry (DAFF).  The information transmitted is for the use of the intended recipient only and may contain confidential and/or legally privileged material.  It is your responsibility to check any attachments for viruses and defects before opening or sending them on.  
> Any reproduction, publication, communication, re-transmission, disclosure, dissemination or other use of the information contained in this e-mail by persons or entities other than the intended recipient is prohibited.  The taking of any action in reliance upon this information by persons or entities other than the intended recipient is prohibited.  If you have received this e-mail in error please notify the sender and delete all copies of this transmission together with any attachments.  If you have received this e-mail as part of a valid mailing list and no longer want to receive a message such as this one advise the sender by return e-mail accordingly.  Only e-mail correspondence which includes this footer, has been authorised by DAFF 
> ----------------------------------------------------------------------