Ubuntu Feisty 7.04 manual page repository

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NAME

      ataraid - ATA software RAID support
 

SYNOPSIS

      device ata
      device ataraid
 

DESCRIPTION

      The ataraid driver provides support for so-called software RAID (some‐
      times referred to as fake RAID or pseudo RAID).
 
      When a controller that supports software RAID is instructed to create a
      RAID array, its BIOS writes data structures in a specific metadata format
      to the disks.  These data structures are picked up by the ataraid driver,
      so that FreeBSD can work with the array.  The ataraid driver has to
      understand the specific metadata format of a controller BIOS in order to
      support its RAID capabilities.
 
      Read-only support for a metadata format means that FreeBSD can use the
      given RAID array for normal read/write operations.  Creation and rebuild
      of such arrays has to be done from the controller BIOS.
 
      Read and write support for a metadata format means that FreeBSD can use
      the given RAID array for normal read/write operations.  Additionally, the
atacontrol(8) utility can be used to create, rebuild, update and fail
      such RAID arrays.
 
      The ataraid driver can read the following metadata formats:
 
            Adaptec HostRAID
            Highpoint V2 RocketRAID
            Highpoint V3 RocketRAID
            Intel MatrixRAID
            Integrated Technology Express (ITE)
            LSI Logic V2 MegaRAID
            LSI Logic V3 MegaRAID
            NVIDIA MediaShield
            Promise FastTrak
            Silicon Image Medley
            VIA Tech V-RAID
            FreeBSD PseudoRAID
 
      The ataraid driver can write the following metadata formats:
 
            Highpoint V2 RocketRAID
            Promise FastTrak
            FreeBSD PseudoRAID
 
      It is also possible to use software RAID on controllers that do not have
atacontrol(8) for details.
 

FILES

      /dev/ar*  ATA RAID device nodes
atacontrol(8)
 

AUTHORS

      The ataraid driver was written by Søren Schmidt 〈sos@FreeBSD.org〉.  This
      manual page was written by Christian Brueffer 〈brueffer@FreeBSD.org〉.
 

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