Magnetic Tape Drivers

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HP OpenVMS I/O User's Reference Manual

I/O Function Codes

Disk Drivers

Mailbox Driver

Magnetic Tape Drivers

This section lists the function codes and function modifiersfor the magnetic tape drivers.

Functions Arguments Modifiers

IO$_READVBLK IO$_READLBLK IO$_READPBLK
P1 -- bufferaddress P2 -- byte count
IO$M_DATACHECK¹

IO$M_INHRETRY

IO$M_REVERSE²

IO$_WRITEVBLK IO$_WRITELBLK IO$_WRITEPBLK
P1 -- bufferaddress

P2 -- byte count
IO$M_DATACHECK

IO$M_INHRETRY

IO$M_INHEXTGAP³

IO$M_NOWAIT⁴

IO$M_ERASE⁵

IO$_SETMODE IO$_SETCHAR
P1 -- characteristicsbuffer address

P2 -- characteristics buffer length⁶

IO$_CREATE IO$_ACCESS IO$_DEACCESS IO$_MODIFY IO$_ACPCONTROL
P1 -- FIBdescriptor address

P2 -- file name string address

P3 -- resultstring length address

P4 -- result string descriptoraddress

P5 -- attribute list address
IO$M_CREATE⁷

IO$M_ACCESS

IO$M_DMOUNT⁸

IO$_SKIPFILE
P1 -- skipn tape marks
IO$M_ALLOWFAST⁹

IO$M_INHRETRY

IO$M_NOWAIT

IO$_SKIPRECORD
P1 -- skipn blocks
IO$M_INHRETRY

IO$M_NOWAIT

IO$_REWIND IO$_REWINDOFF IO$_UNLOAD
None
IO$M_INHRETRY

IO$M_NOWAIT

IO$M_RETENSION

IO$_WRITEOF
None
IO$M_INHEXTGAP

IO$M_INHRETRY

IO$M_NOWAIT

IO$_SENSEMODE IO$_SENSECHAR
P1 -- characteristics buffer address

P2 -- characteristics buffer length
IO$M_INHRETRY

IO$_DSE¹⁰

IO$_PACKACK IO$_AVAILABLE
None
None

Functions	Arguments	Modifiers
IO$_READVBLK IO$_READLBLK IO$_READPBLK	P1 -- bufferaddress P2 -- byte count	IO$M_DATACHECK¹ IO$M_INHRETRY IO$M_REVERSE²
IO$_WRITEVBLK IO$_WRITELBLK IO$_WRITEPBLK	P1 -- bufferaddress P2 -- byte count	IO$M_DATACHECK IO$M_INHRETRY IO$M_INHEXTGAP³ IO$M_NOWAIT⁴ IO$M_ERASE⁵
IO$_SETMODE IO$_SETCHAR	P1 -- characteristicsbuffer address P2 -- characteristics buffer length⁶
IO$_CREATE IO$_ACCESS IO$_DEACCESS IO$_MODIFY IO$_ACPCONTROL	P1 -- FIBdescriptor address P2 -- file name string address P3 -- resultstring length address P4 -- result string descriptoraddress P5 -- attribute list address	IO$M_CREATE⁷ IO$M_ACCESS IO$M_DMOUNT⁸
IO$_SKIPFILE	P1 -- skipn tape marks	IO$M_ALLOWFAST⁹ IO$M_INHRETRY IO$M_NOWAIT
IO$_SKIPRECORD	P1 -- skipn blocks	IO$M_INHRETRY IO$M_NOWAIT
IO$_REWIND IO$_REWINDOFF IO$_UNLOAD	None	IO$M_INHRETRY IO$M_NOWAIT IO$M_RETENSION
IO$_WRITEOF	None	IO$M_INHEXTGAP IO$M_INHRETRY IO$M_NOWAIT
IO$_SENSEMODE IO$_SENSECHAR	P1 -- characteristics buffer address P2 -- characteristics buffer length	IO$M_INHRETRY
IO$_DSE¹⁰ IO$_PACKACK IO$_AVAILABLE	None	None

QIO Status Returns

SS$_ABORT
SS$_CANCEL
SS$_CTRLERR

SS$_DATACHECK
SS$_DATAOVERUN
SS$_DEVOFFLINE

SS$_DRVERR
SS$_ENDOFFILE
SS$_ENDOFTAPE

SS$_ENDOFVOLUME
SS$_FORMAT
SS$_ILLIOFUNC

SS$_MEDOFL
SS$_NONEXDRV
SS$_NORMAL

SS$_OPINCOMPL
SS$_PARITY
SS$_SERIOUSEXCP

SS$_TIMEOUT
SS$_UNSAFE
SS$_VOLINV

SS$_WRITLCK

QIO Status Returns
SS$_ABORT	SS$_CANCEL	SS$_CTRLERR
SS$_DATACHECK	SS$_DATAOVERUN	SS$_DEVOFFLINE
SS$_DRVERR	SS$_ENDOFFILE	SS$_ENDOFTAPE
SS$_ENDOFVOLUME	SS$_FORMAT	SS$_ILLIOFUNC
SS$_MEDOFL	SS$_NONEXDRV	SS$_NORMAL
SS$_OPINCOMPL	SS$_PARITY	SS$_SERIOUSEXCP
SS$_TIMEOUT	SS$_UNSAFE	SS$_VOLINV
SS$_WRITLCK

Footnotes

1 Not for TS04 and TU80
2 Not for TK50
3 Only for TE16, TU45, and TU77
4 Only for TU81-Plus drives
5 IO$M_REASE takes no arguments; only for IO$_WRITEBLK and IO$_WRITEPBLKon TMSCP drives.
6 Only for TMSCP drives
7 Only for IO$_CREATE and IO$_ACCESS
8 Only for IO$_ACPCONTROL
9 Onlyfor local SCSI drives
10 Onlyfor TU78, TU81, TA81, and TA78

( Number takes you back )

Disk Drivers

Mailbox Driver