MFC: graid(8) (RAID GEOM) support

Jeremy Chadwick freebsd at
Tue Jun 21 19:16:35 UTC 2011

On Fri, Jun 17, 2011 at 05:51:24PM -0700, Jeremy Chadwick wrote:
> Sorry for the cross-post, but I thought both lists would want to know
> about this.
> Looks like mav@ just committed this ~17 hours ago:
> Those who have historically wanted to use Intel MatrixRAID (now called
> Intel RST (Rapid Storage Technology)), but haven't due to the severe
> issues/risks with ataraid(4), will probably be very interested in
> this commit.  I know I am!
> I plan on stress-testing the Intel support on a 2-disk system with
> RAID-1 enabled, and will document my experiences, procedures, etc...
> Thanks, mav@ and imp@ !
> I'll be sending another mail momentarily asking about USB memory stick
> image building, since to accomplish the above, I want to do a
> "bare-bones" install on our test system (e.g. enable Intel RAID, set up
> 2 disks in a RAID-1 mirror, boot a USB memory stick that contains this
> latest RELENG_8 build, and do sysinstall, etc.. the normal way).
> =====================================================================
> MFC r219974, r220209, r220210, r220790:
> Add new RAID GEOM class, that is going to replace ataraid(4) in supporting
> various BIOS-based software RAIDs. Unlike ataraid(4) this implementation
> does not depend on legacy ata(4) subsystem and can be used with any disk
> drivers, including new CAM-based ones (ahci(4), siis(4), mvs(4), ata(4)
> with `options ATA_CAM`). To make code more readable and extensible, this
> implementation follows modular design, including core part and two sets
> of modules, implementing support for different metadata formats and RAID
> levels.
> Support for such popular metadata formats is now implemented:
> Intel, JMicron, NVIDIA, Promise (also used by AMD/ATI) and SiliconImage.
> Such RAID levels are now supported:
> For all of these RAID levels and metadata formats this class supports
> full cycle of volume operations: reading, writing, creation, deletion,
> disk removal and insertion, rebuilding, dirty shutdown detection
> and resynchronization, bad sector recovery, faulty disks tracking,
> hot-spare disks. For Intel and Promise formats there is support multiple
> volumes per disk set.
> Look graid(8) manual page for additional details.
> Co-authored by: imp
> Sponsored by:   Cisco Systems, Inc. and iXsystems, Inc.
> =====================================================================

By the way, it doesn't look like the graid(8) man page is being brought
in to the base system on either of the two RELENG_8 systems I've rebuilt
in the past few days.

I'm thinking /usr/src/sbin/geom/class/raid/graid.8 isn't being noticed
as a man page.

/usr/src/sbin/geom/class/raid/Makefile doesn't have MAN8=graid.8 in it,
is that the problem?

| Jeremy Chadwick                                jdc at |
| Parodius Networking              |
| UNIX Systems Administrator                   Mountain View, CA, US |
| Making life hard for others since 1977.               PGP 4BD6C0CB |

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