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cmdk (7)
  • >> cmdk (7) ( Solaris man: Макропакеты и соглашения )
  •  

    NAME

    cmdk - common disk driver
     
    

    SYNOPSIS

    cmdk@target, lun : [ partition | slice ]
    

     

    DESCRIPTION

    The cmdk device driver is a common interface to various disk devices. The driver supports magnetic fixed disks and magnetic removable disks.

    The cmdk device driver supports three different disk labels: fdisk partition table, Solaris x86 VTOC and EFI/GPT.

    The block-files access the disk using the system's normal buffering mechanism and are read and written without regard to physical disk records. There is also a "raw" interface that provides for direct transmission between the disk and the user's read or write buffer. A single read or write call usually results in one I/O operation; raw I/O is therefore considerably more efficient when many bytes are transmitted. The names of the block files are found in /dev/dsk. Raw file names are found in /dev/rdsk.

    I/O requests to the magnetic disk must have an offset and transfer length that is a multiple of 512 bytes or the driver returns an EINVAL error.

    Slice 0 is normally used for the root file system on a disk, slice 1 as a paging area (for example, swap), and slice 2 for backing up the entire fdisk partition for Solaris software. Other slices may be used for usr file systems or system reserved area.

    The fdisk partition 0 is to access the entire disk and is generally used by the fdisk(1M) program.  

    FILES

    /dev/dsk/cndn[s|p]n

    block device (IDE)

    /dev/rdsk/cndn[s|p]n

    raw device (IDE)

    where:

    cn

    controller n.

    dn

    lun n (0-1).

    sn

    UNIX system slice n (0-15).

    pn

    fdisk partition (0-36).

    /kernel/drv/cmdk

    32-bit kernel module.

    /kernel/drv/amd64/cmdk

    64-bit kernel module.

     

    ATTRIBUTES

    See attributes(5) for descriptions of the following attributes:

    ATTRIBUTE TYPEATTRIBUTE VALUE

    Architecturex86

     

    SEE ALSO

    fdisk(1M), mount(1M), lseek(2), read(2), write(2), readdir(3C), scsi(4), vfstab(4), attributes(5), dkio(7I)


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    FILES
    ATTRIBUTES
    SEE ALSO


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