DS(4)                   COMMAND REFERENCE                   DS(4)



NAME
     ds - SCSI Winchester disk

DESCRIPTION
     The files /dev/dsxyz refer to the SCSI Winchester disk
     interface.  The 61TC01 option 14 disk provides 40 Mb of
     storage in the same cabinet as the 61TC01 tape drive.  The
     partition tables and overall operation of the SCSI disk are
     identical to those for the built-in disk.

     The raw disk (/dev/rdsxyz) is formatted with 512 byte
     blocks.  All reads, writes and seeks should be multiples of
     512 bytes.

DIAGNOSTICS
     dsxyz: no disk
             An attempt was made to access a nonexistant disk
             drive.

     dsxyz: blown format
             The disk must be reformatted.  See format(8).

     dsxyz: hard error, sector nnnnn
             An unrecoverable disk error occurred.  If the error
             is repeatable, the drive should be reformatted and
             the given address added to the defect list.  This
             message is printed on the system console.

RETURN VALUE
     If an error occurs, the call returns -1 and one of the
     following values is left in errno:

     [ENODEV]    You have attempted to open a nonexistant or
                 unformatted drive.

     [ENXIO]     You have attempted to read or write beyond the
                 end of the partition.

     [EIO]       An unrecoverable I/O error has occurred.

CAVEATS
     Turning off the disk drive while it is in use may damage the
     file system or crash the workstation.

SEE ALSO
     dump(8), restore(8), format(8), mkfs(8), fstab(5).









Printed 10/17/86  Engineering Computing Systems                 1

%%index%%
na:72,61;
de:133,651;
di:784,615;
rv:1399,451;
ca:1850,160;
se:2010,171;
%%index%%000000000106