diff options
Diffstat (limited to 'share/man')
| -rw-r--r-- | share/man/man4/softraid.4 | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/share/man/man4/softraid.4 b/share/man/man4/softraid.4 index bf569612e82..e31f20a5277 100644 --- a/share/man/man4/softraid.4 +++ b/share/man/man4/softraid.4 @@ -1,4 +1,4 @@ -.\" $OpenBSD: softraid.4,v 1.21 2009/05/01 19:00:40 jmc Exp $ +.\" $OpenBSD: softraid.4,v 1.22 2009/06/17 23:11:38 marco Exp $ .\" .\" Copyright (c) 2007 Todd T. Fries <todd@OpenBSD.org> .\" Copyright (c) 2007 Marco Peereboom <marco@OpenBSD.org> @@ -15,7 +15,7 @@ .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. .\" -.Dd $Mdocdate: May 1 2009 $ +.Dd $Mdocdate: June 17 2009 $ .Dt SOFTRAID 4 .Os .Sh NAME @@ -79,6 +79,22 @@ though at the cost of write speed. Unlike traditional RAID 1, .Nm supports the use of more than two chunks in a RAID 1 setup. +.It RAID 4 +A +.Em striping +discipline with a fixed parity chunk. +It stripes data accross chunks and provides parity to prevent data loss of +a single chunk failure. +Read performance is increased however write performance is limited by the +parity chunk. +.It RAID 5 +A +.Em striping +discipline with floating parity accross all chunks. +It stripes data accross chunks and provides parity to prevent data loss of +a single chunk failure. +Read performance is increased however write performance should be faster than +RAID 4. .It CRYPTO An .Em encrypting @@ -153,6 +169,9 @@ The RAID 1 discipline does not initialize the mirror upon creation. This is by design because all sectors that are read are written first. There is no point in wasting a lot of time syncing random data. .Pp +The RAID 4 & 5 disciplines do not initialize the parity upon creation. +This is due to the scrub functionality not being currently implemented. +.Pp Currently there is no automated mechanism to recover from failed disks. .Pp There is no boot support at this time for any disciplines. |