MFC: graid(8) (RAID GEOM) support

[Alexander Motin]

Jeremy Chadwick wrote:
> 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:
>> http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/geom/raid/g_raid.c
>>
>> 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:
>> RAID0, RAID1, RAID1E, RAID10, SINGLE, CONCAT.
>>
>> 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?

I've just rebuilt my test 8-STABLE system and it installed graid(8).

-- 
Alexander Motin