mpi/mpii cards that do IR/IS or IM should do RAID 1 just fine and are supported by bioctl. You just have to purchase the card carefully and make sure it has one of those acronyms.
A bit more expensive would be mfi but those are well supported. What I don't know much about but is cheap are the areca cards. Some people swear by them; I simply haven't used them so I have no opinion. On Mon, Nov 15, 2010 at 06:30:18PM +0100, m...@mdaniel.de wrote: > I have a hard time finding a RAID1 capable controller that is well > supported via bioctl, available, and not too expensive. > Is there e.g. a nice mpi or mpii card that can be controlled via bioctl? > The man page only mentions that some mpi cards offer Raid1. Of course > it doesn't have to be a mpi card. > This PCI-e card would be used with Sata disks on the i386 architecture > (OpenBSD 4.8). > > Thanks. > > Background: > ----------- > I could do /var on softraid together with altroot but I seek the > convenience of RAID1 to be able to select when to reboot in case > of disk failure. > I am fully aware that RAID is no backup concept and that now the > controller becomes a single point of failure. > Maybe the controller that you recommend will have the additional > benefit of allowing me to attach a disk to a standard Sata controller > in case of RAID controller failure? Otherwise I am prepared to order > two identical controllers to mitigate this problem. > > Please feel free to point out any error in my thinking and don't hesitate > to mention if I should implement a different set up. > It is probably unavoidable that my desire for cheap raid hardware will > not be met with unconditional approval ;-) > > Cheers, > > Marcus
