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cmdk(7D)Name | Synopsis | Description | Files | Attributes | See Also Name
Synopsiscmdk@target, lun : [ partition | slice ] DescriptionThe 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. FilesAttributesSee attributes(5) for descriptions of the following attributes:
See Alsofdisk(1M), mount(1M), lseek(2), read(2), write(2), readdir(3C), scsi(4), vfstab(4), attributes(5), dkio(7I) Name | Synopsis | Description | Files | Attributes | See Also |
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