st(7)                            DG/UX 5.4.2                           st(7)


NAME
       st - access a SCSI tape drive

SYNOPSIS
       /dev/rmt/st (adapname@devicecode (adapaddr[,adapid]),deviceid,d)
                   [compression] [density] [norewind]

DESCRIPTION
       The st device driver accesses a Small Computer Systems Interface
       (SCSI) tape drive.  The currently supported models on your AViiON
       system are:

       Model #        Description
       6577           QIC-150 150MB 1/4" cartridge
       6677           QIC-320 320MB/525MB 1/4" cartridge
       6691           QIC-320 320MP/525MB 1/4" stand-alone
       6590           8mm 2GB helical scan
       6586, 6587     1600 bpi 1/2" autoload streaming reel-to-reel
       6588, 6589     6250/1600/800(optional) bpi 1/2" autoload streaming
                      reel-to-reel
       6760           8mm 5GB 5 1/4" helical scan
       6762           4mm 2GB 3 1/2" DAT

       The st device driver accesses these tape units via special file nodes
       in /dev/rmt:

       adapname      The name of the SCSI adapter; currently supported
                      adapters are cisc, dgsc, insc, ncsc, and hada.

       @devicecode   The adapter's hexadecimal device code, preceded by the
                      @ character

       adapaddr      The adapter's hexidecimal address

       adapid        The adapter's SCSI ID (range 0-7, recommended 7 or 6).
                      Omit to accept the default ID 7.

       deviceid      The tape drive's SCSI ID (range 0-7)

       d              The tape drive's unit number (range 0-7)

       compression    For models that support data compression, c enables
                      and u disables compression. On the model 6762 drive,
                      data compression is enabled by default.

       density        For models that support different densities, h selects
                      high, m selects medium, and l selects low density

       norewind       n prevents the tape unit from rewinding to beginning
                      of tape (BOT) when closed.

       See rmt(7) for a description of the character special device access
       method provided by st.




Licensed material--property of copyright holder(s)                         1

st(7)                            DG/UX 5.4.2                           st(7)


       Model 6577 supports only fixed-length records of 512 bytes.
       Attempted I/O to this model using a record size that is not a
       multiple of 512 bytes will fail with an errno of EINVAL.

       The other models support variable-length records up to 65,536 bytes.

EXAMPLES
       The following statement accesses any of the supported tape drives
       listed above:

            st(cisc@28(FFFFF300,6),4,0)

       The tape drive uses SCSI adapter cisc; the adapter's device code is
       28; the adapter's address is FFFFF300; the adapter's ID is 6; the
       tape drive's SCSI ID is 4; and the tape unit number is 0.

       The following statement accepts the default adapter ID of 7, disables
       data compression (u), and specifies no-rewind (n):

            st(cisc@28(FFFFF300),4,0)un

FILES
       /dev/rmt/*

SEE ALSO
       rmt(7), cisc(7), dgsc(7), hada(7), insc(7), ncsc(7).































Licensed material--property of copyright holder(s)                         2