What is the speciality of slice 2? Post: 302533559

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cmdk

cmdk(7D)							      Devices								  cmdk(7D)

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 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 sin-
       gle read or write call usually results in one I/O operation; raw I/O is therefore considerably more efficient when many bytes are transmit-
       ted. The names of the block files are found in /dev/dsk; the names of the raw files 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.

       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 (0-7)

			       sn	UNIX system slice n (0-15)

			       pn	fdisk partition(0)

       /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 TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Architecture		     |x86			   |
       +-----------------------------+-----------------------------+

SEE ALSO

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

SunOS 5.10							    9 Oct 2004								  cmdk(7D)

10 More Discussions You Might Find Interesting

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Discussion started by: guillaume35

2. UNIX for Advanced & Expert Users

artichture of Slice

Discussion started by: smdakram

3. AIX

4 procs, can I slice ?

Discussion started by: A Stewart

4. Solaris

mirroring the boot slice (slice 8) on x86

Discussion started by: hcclnoodles