Manual Pages for UNIX Operating System command usage for man dad

Devices                                                   dad(7D)



NAME
     dad - driver for IDE disk devices

SYNOPSIS
     dad@ target,lun:partition


DESCRIPTION
     This driver handles the ide disk drives on SPARC  platforms.
     The type of disk drive is determined using the ATA IDE iden-
     tify device command and by reading the volume  label  stored
     on  the  drive.  The  dad device driver supports the Solaris
     SPARC VTOC and the EFI/GPT disk volume labels.


     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 there-
     fore  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 raw device must be aligned on a 512-byte
     (DEV_BSIZE) boundary and must have a length that is a multi-
     ple of 512 bytes. Requests that do not meet the restrictions
     cause  the driver to return an EINVAL error. I/O requests to
     the block device have no alignment or length restrictions.

  Device Statistics Support
     Each device maintains I/O statistics both for the device and
     for  each  partition  allocated  on  that  device.  For each
     device/partition,  the  driver  accumulates  reads,  writes,
     bytes  read,  and  bytes written. The driver also takes  hi-
     resolution time stamps at queue entry and exit points, which
     facilitates  monitoring  the  residence  time and cumulative
     residence-length product for each queue.


     Each device also has error statistics  associated  with  it.
     These must include counters for hard errors, soft errors and
     transport errors. Other data may be implemented as required.

FILES
     /dev/dsk/cntndnsn      block files


     /dev/rdsk/cntndnsn     raw files




SunOS 5.11          Last change: 24 Oct 2005                    1






Devices                                                   dad(7D)



     where:

     cn     controller  n


     tn     IDE target id  n (0-3)


     dn     Always 0.


     sn     partition  n (0-7)



     The target ide numbers are assigned as:

     0    Master disk on Primary channel.


     1    Slave disk on Primary channel.


     2    Master disk on Secondary channel


     3    Slave disk on Secondary channel.


IOCTLS
     Refer to dkio(7I).

ERRORS
     EACCES     Permission denied.


     EBUSY      The partition was opened exclusively  by  another
                thread.


     EFAULT     Argument was a bad address.


     EINVAL     Invalid argument.


     EIO         I/O error occurred.


     ENOTTY     The device does not  support the requested  ioctl
                function.




SunOS 5.11          Last change: 24 Oct 2005                    2






Devices                                                   dad(7D)



     ENXIO      The device did not exist during opening.


     EROFS      The device is a read-only device.


SEE ALSO
     format(1M),   mount(1M),   lseek(2),   read(2),    write(2),
     driver.conf(4), vfstab(4), dkio(7I)


     X3T10 ATA-4 specifications.

DIAGNOSTICS
     Command:, Error:, Status:

         Indicates that the command failed with an error and pro-
         vides status register contents. Where  is a hex-
         adecimal value.


     offline

         The driver has decided that the target disk is no longer
         there.


     disk ok

         The target disk is now responding again.


     disk not responding to selection

         The target disk is not responding.


     i/o to invalid geometry

         The geometry of the drive could not be established.


     incomplete read/write - retrying/giving up

         There was a residue after  the  command  completed  nor-
         mally.


     no bp for disk label

         A bp with consistent memory could not be allocated.




SunOS 5.11          Last change: 24 Oct 2005                    3






Devices                                                   dad(7D)



     no memory for disk label

         Free memory pool exhausted.


     ATA transport failed: reason 'nnnn': {retrying|giving}

         The host adapter has failed to transport  a  command  to
         the target for the reason stated. The driver will either
         retry the command or, ultimately, give up.


     no mem for property

         Free memory pool exhausted.


     transport rejected ()

         Host adapter driver was unable to accept a command.


     Device Fault

         Device fault - reason for such error is vendor specific.






























SunOS 5.11          Last change: 24 Oct 2005                    4