diff options
Diffstat (limited to 'sbin/geom')
| -rw-r--r-- | sbin/geom/class/raid/graid.8 | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/sbin/geom/class/raid/graid.8 b/sbin/geom/class/raid/graid.8 index e9fd5a4..75c0bd9 100644 --- a/sbin/geom/class/raid/graid.8 +++ b/sbin/geom/class/raid/graid.8 @@ -24,7 +24,7 @@ .\" .\" $FreeBSD$ .\" -.Dd April 19, 2012 +.Dd April 30, 2012 .Dt GRAID 8 .Os .Sh NAME @@ -200,6 +200,19 @@ The GEOM RAID class follows a modular design, allowing different metadata formats to be used. Support is currently implemented for the following formats: .Bl -tag -width "Intel" +.It DDF +The format defined by the SNIA Common RAID Disk Data Format v2.0 specification. +Used by some Adaptec RAID BIOSes and some hardware RAID controllers. +Because of high format flexibility different implementations support +different set of features and have different on-disk metadata layouts. +To provide compatibility, the GEOM RAID class mimics capabilities and +metadata layout of the first detected DDF array. +Respecting that, it may support different number of disks per volume, +volumes per array, partitions per disk, etc. +The following configurations are supported: RAID0 (2+ disks), RAID1 (2+ disks), +RAID1E (3+ disks), RAID3 (3+ disks), RAID4 (3+ disks), RAID5 (3+ disks), +RAID5E (4+ disks), RAID5EE (4+ disks), RAID5R (3+ disks), RAID6 (4+ disks), +RAIDMDF (5+ disks), RAID10 (4+ disks), SINGLE (1 disk), CONCAT (2+ disks). .It Intel The format used by Intel RAID BIOS. Supports up to two volumes per array. |
