6.0 RELEASE and Volume Managers

Yousef Raffah yraffah at savola.com
Sun May 7 09:57:52 UTC 2006

On Sun, 2006-05-07 at 11:34 +0200, Matthias Andree wrote:
> Yousef Raffah <yraffah at savola.com> writes:
> > I'm trying to install a new server which has a hardware RAID controller.
> Hardware RAID controllers such as amr(4) or twe(4) (I've seen LSI
> MegaRAID SCSI 320-1 and 3Ware Escalade 8006-2 LP, the latter is a 2-port
> SATA controller and can't do RAID5 for lack of ports) stuff usually
> presents a whole logical unit as a single SCSI drive (/dev/da0 for the
> first disk array, /dev/da1 for the second and so on), so you shouldn't
> need vinum, geom or anything like that - just the driver would suffice.
> If you need vinum or geom to implement a RAID then chances are your
> so-called "hardware RAID" is actually fake (fakeraid) and really
> software RAID. Adaptec "HostRAID" and the RAID in intel's ICH x-R
> chipsets falls into this fakeraid category. The vendors don't like to
> present it as software RAID, so that particular bit is extremely hard to
> find :-(
> What is the brand and model of your so-called hardware RAID?
The machine is a compaq server with Smart RAID controller

Yousef Raffah
Senior Systems Administrator

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