HP OpenVMS System Services Reference Manual
The device drivers for the following adapters do not maintain the link
status: DEMNA, any TURBOchannel adapter, any PCMCIA adapter, any Token
Ring adapter, Galaxy shared memory, TGEC, DE205, DE422, DE425, DE434,
DE435, DE500-XA. (The -AA and -BA variants are supported.)
DVI$_LAN_LINK_UP
On Alpha and I64 systems, returns an unsigned longword, which is
interpreted as Boolean. A value of 1 indicates that the link is up.
This item code is valid only for the template device (that is, unit
number 0); this item returns 0 if used against a nontemplate LAN device.
This item is supported only on newer adapters. To determine whether or
not a particular LAN device supports DVI$_LAN_LINK_UP, you must first
call $GETDVI using the item code DVI$_LAN_LINK_STATE_VALID. For more
information, see that item code.
If DVI$_LAN_LINK_UP is used on an adapter that does not maintain the
link status, the returned status from $GETDVI will be SS$_UNSUPPORTED.
For more information, see DVI$_LAN_LINK_VALID.
DVI$_LAN_MAC_ADDRESS
On Alpha and I64 systems, returns the current MAC address of the device
as a string. Note that certain protocols, such as DECnet Phase IV,
change the default MAC address to one based on the DECnet address. For
DECnet Phase IV, the MAC address is in the form AA-00-04-00-nn-mm,
where nn-mm is calculated by multiplying the the DECnet Phase IV area
number by 1024, adding the node number (that is, the number following
the dot), taking the hexadecimal representation of that sum, and
swapping the two bytes.
For example, a node with a DECnet Phase IV address of 3.31 gives a
decimal representation of 3103 (the value corresponding to the system
parameter SCSSYSTEMID) and a hexadecimal representation of 0C1F. If
DECnet Phase IV is started on this system, the MAC address of any LAN
adapter on this system running DECnet is AA-00-04-00-1F-0C. <
PARAMITEM>(DVI$_LAN_PROMISCUOUS_MODE) On Alpha and I64 systems,
returns an unsigned longword, which is interpreted as Boolean. A value
of 1 indicates that the device is enabled to receive all packets, not
just packets addressed to the MAC address and enabled multicast
addresses.
DVI$_LAN_PROTOCOL_NAME
On Alpha and I64 systems, returns the name of the LAN protocol running
on the device as a string.
DVI$_LAN_PROTOCOL_TYPE
On Alpha and I64 systems, returns the LAN protocol type running on the
device as a string.
DVI$_LAN_SPEED
On Alpha and I64 systems, returns the speed of the LAN device (in Mb/s)
as an unsigned longword. Valid values are 4, 10, 16, 100, 1000, and
10000.
DVI$_LOCKID
Returns the lock ID of the lock on a disk as an unsigned longword. The
lock manager locks a disk if it is available to all nodes in an OpenVMS
Cluster system and it is either allocated or mounted. A disk is
available to all nodes in an OpenVMS Cluster system if, for example, it
is served by an HSC controller or MSCP server or if it is a dual-ported
MASSBUS disk.
DVI$_LOGVOLNAM
Returns the logical name of the volume or volume set as a string.
DVI$_MAILBOX_BUFFER_QUOTA
On Alpha and I64 systems, returns the current mailbox quota as an
unsigned integer longword.
DVI$_MAILBOX_INITIAL_QUOTA
On Alpha and I64 systems, returns the initial mailbox quota as an
unsigned integer longword.
DVI$_MAXBLOCK
Returns the maximum number of blocks on the volume as an unsigned
integer longword. This item code is applicable only to disks.
DVI$_MAXFILES
Returns the maximum number of files on the volume as an unsigned
integer longword. This item code is applicable only to disks.
DVI$_MEDIA_ID
Returns the nondecoded media ID as a longword. This item code is
applicable only to disks and tapes.
DVI$_MEDIA_NAME
Returns the name of the volume type (for example, RK07 or TA78) as a
string. This item code is applicable only to disks and tapes.
DVI$_MEDIA_TYPE
Returns the device name prefix of the volume (for example, DM for an
RK07 device or MU for a TA78 device) as a string. This item code is
applicable only to disks and tapes.
DVI$_MOUNT_TIME
On Alpha and I64 systems, returns the time at which the volume was
mounted. Because the returned time is in the standard 64-bit absolute
time format, specify 8 (bytes) for the buffer length field in the item
descriptor.
Note that for volumes mounted in a cluster, only the time of the
initial mount is recorded; the time of any subsequent mount is not
recorded.
DVI$_MOUNTCNT
Returns the mount count for the volume as an unsigned integer longword
and displays the number of times the volume has been mounted on the
local system.
The value of MOUNTCNT displayed by the SHOW DEVICE command is the total
of all mounts of the volume across all members of the cluster.
DVI$_MOUNTVER_ELIGIBLE
On Alpha and I64 systems, returns an unsigned longword, which is
interpreted as Boolean. A value of 1 indicates the volume is eligible
to undergo mount verification. A volume mounted with either the
/FOREIGN or /NOMOUNT_VERIFICATION qualifier is not subject to mount
verification.
DVI$_MPDEV_AUTO_PATH_SW_CNT
On Alpha and I64 systems, returns as an unsigned longword the number of
times a multipath device has automatically switched paths due to an I/O
error, or as the result of automatically "failing back" to a
local path from a remote path after the local path became available.
DVI$_MPDEV_CURRENT_PATH
On Alpha and I64 systems, returns the current path name for multipath
devices as a string.
If the device is not part of a multipath set, $GETDVI will return the
name of the device path if the class driver for this device supports
path names. SYS$DKDRIVER, SYS$DUDRIVER, SYS$MKDRIVER, and SYS$GKDRIVER
support path names.
If the class driver for the device does not support path names, $GETDVI
returns a null string.
DVI$_MPDEV_MAN_PATH_SW_CNT
On Alpha and I64 systems, returns as an unsigned longword the number of
times a multipath device has manually switched paths due to a $SET
DEVICE /PATH /SWITCH command or the use of the $SET_DEVICE system
service.
DVI$_MSCP_UNIT_NUMBER
Returns the internal coded value for MSCP unit numbers as a longword
integer. This item code is reserved to HP.
DVI$_MT3_DENSITY
Returns the density of the device. Valid for tapes only. This code is
an unsigned longword integer.
DVI$_MT3_SUPPORTED
The return value of 1 indicates that the device supports tape density
codes defined by MT3DEF. Valid for tapes only. This code is an unsigned
longword integer.
DVI$_MULTIPATH
On Alpha and I64 systems, returns a longword, interpreted as Boolean. A
value of 1 indicates the device is a member of a multipath set.
DVI$_MVSUPMSG
On Alpha and I64 systems, returns an unsigned longword, interpreted as
Boolean. A value of 1 indicates that mount verification OPCOM messages
are currently being suppressed on this device. See the MVSUPMSG_INTVL
AND MVSUPMSG_NUM system parameters for more information on the
suppression of mount verification messages.
DVI$_NEXTDEVNAM
Returns the device name of the next volume in the volume set as a
string. The node name is also returned. This item code is applicable
only to disks.
DVI$_NOCACHE_ON_VOLUME
On Alpha and I64 systems, returns an unsigned longword, which is
interpreted as Boolean. A value of 1 indicates the volume is mounted
with all caching disabled
DVI$_NOHIGHWATER
On Alpha and I64 systems, returns an unsigned longword, which is
interpreted as Boolean. A value of 1 indicates that high-water marking
is disabled on the volume.
DVI$_NOSHARE_MOUNTED
On Alpha and I64 systems, returns an unsigned longword, which is
interpreted as Boolean. A value of 1 indicates the volume is mounted
/NOSHARE.
DVI$_ODS2_SUBSET0
On Alpha and I64 systems, returns an unsigned longword, which is
interpreted as Boolean. A value of 1 indicates the volume supports only
a subset of the ODS-2 file structure.
DVI$_ODS5
On Alpha and I64 systems, returns an unsigned longword, which is
interpreted as Boolean. A value of 1 indicates the volume is mounted
ODS-5.
DVI$_OPCNT
Returns the operation count of the device as an unsigned longword. Note
that the operation count might have been reset with the SET
DEVICE/RESET=OPCNT command.
On Alpha and I64 systems, this item code can be used with the PATHNAME
parameter. If the PATHNAME parameter is omitted, the summation of the
operation counts for all paths in a multipath device is returned (which
was the behavior prior to the introduction of the PATHNAME parameter).
If the PATHNAME parameter is specified, only the operation count for
that path is returned.
DVI$_OWNUIC
Returns the user identification code (UIC) of the owner of the device
as a standard 4-byte UIC.
DVI$_PATH_AVAILABLE
On Alpha and I64 systems, returns an unsigned longword, interpreted as
Boolean. A value of 1 indicates the specified path is available.
This item code is usually used with the PATHNAME parameter. If the
PATHNAME parameter is omitted, information about the current path of
the multipath device is returned.
DVI$_PATH_NOT_RESPONDING
On Alpha and I64 systems, returns an unsigned longword, interpreted as
Boolean. A value of 1 indicates the specified path is marked as not
responding.
This item code is usually used with the PATHNAME parameter. If the
PATHNAME parameter is omitted, information about the current path of
the multipath device is returned.
DVI$_PATH_POLL_ENABLED
On Alpha and I64 systems, returns an unsigned longword, interpreted as
Boolean. A value of 1 indicates that the specified path is enabled for
multipath polling.
This item code is usually used with the PATHNAME parameter. If the
PATHNAME parameter is omitted, information about the current path of
the multipath device is returned.
DVI$_PATH_SWITCH_FROM_TIME
On Alpha and I64 systems, returns the time from which this path was
switched, either manually or automatically. Because the returned time
is in the standard 64-bit absolute time format, specify 8 (bytes) for
the buffer length field in the item descriptor.
This item code is usually used with the PATHNAME parameter. If the
PATHNAME parameter is omitted, information about the current path of
the multipath device is returned.
DVI$_PATH_SWITCH_TO_TIME
On Alpha and I64 systems, returns the time to which this path was
switched, either manually or automatically. Because the returned time
is in the standard 64-bit absolute time format, specify 8 (bytes) for
the buffer length field in the item descriptor.
This item code is usually used with the PATHNAME parameter. If the
PATHNAME parameter is omitted, information about the current path of
the multipath device is returned.
DVI$_PATH_USER_DISABLED
On Alpha and I64 systems, returns an unsigned longword, interpreted as
Boolean. A value of 1 indicates the specified path has been disabled
using the $SET DEVICE /PATH /NOENABLE command.
This item code is usually used with the PATHNAME parameter. If the
PATHNAME parameter is omitted, information about the current path of
the multipath device is returned.
DVI$_PID
Returns the process identification (PID) of the owner of the device as
an unsigned integer longword.
DVI$_PREFERRED_CPU
Do not use this item code. The service continues to return the correct
data for systems with up to 64 CPUs but fails for systems with more
than 64 CPUs. Use item code DVI$_PREFERRED_CPU_BITMAP instead.
DVI$_PREFERRED_CPU_BITMAP
On Alpha and I64 systems, the return argument is a bitmap with a bit
indicating the preferred CPU. A return argument containing a bit mask
of zero indicates that no preferred CPU exists, either because Fast
Path is disabled or the device is not a Fast Path capable device. The
return argument serves as a CPU bitmap input argument to the
$PROCESS_AFFINITY system service. The argument can be used to assign an
application process to the optimal preferred CPU.
The size of the returned bitmap is determined by the number of
supported CPUs on the system. You can compute the number of bytes
needed for the bitmap as follows: Use the $GETSYI system service with
an item code of SYI$_MAX_CPUS to find the minimum number of bits
needed, round this number up to a multiple of 64, and divide the result
by 8.
DVI$_PROT_SUBSYSTEM_ENABLED
On Alpha and I64 systems, returns an unsigned longword, which is
interpreted as Boolean. A value of 1 indicates the volume is mounted
with protected subsystems enabled.
DVI$_RECSIZ
Returns the blocked record size as an unsigned integer longword.
DVI$_REFCNT
Returns the number of channels assigned to the device as an unsigned
integer longword.
DVI$_REMOTE_DEVICE
Returns a longword, which is interpreted as Boolean. A value of 1
indicates that the device is a remote device; a value of 0 indicates
that it is not a remote device. A remote device is a device that is not
directly connected to the local node, but instead is visible through
the OpenVMS Cluster system.
DVI$_ROOTDEVNAM
Returns the device name of the root volume in the volume set as a
string. This item code is applicable only to disks.
DVI$_SCSI_DEVICE_FIRMWARE_REV
On Alpha and I64 systems, returns the firmware revision of a SCSI disk
or SCSI tape as a four-character string. This item code is valid only
for SCSI disks and SCSI tapes; a null string is returned for any other
device.
DVI$_SECTORS
Returns the number of sectors per track as an unsigned integer
longword. This item code is applicable only to disks.
DVI$_SERIALNUM
Returns the serial number of the volume as an unsigned integer
longword. This item code is applicable only to disks.
DVI$_SERVED_DEVICE
Returns a longword, which is interpreted as Boolean. A value of 1
indicates that the device is a served device; a value of 0 indicates
that it is not a served device. A served device is one whose local node
makes it available to other nodes in the OpenVMS Cluster system.
DVI$_SHDW_CATCHUP_COPYING
Returns a longword, which is interpreted as Boolean. The value 1
indicates that the device is the target of a full copy operation.
DVI$_SHDW_COPIER_NODE
On Alpha and I64 systems, returns the name of the node that is actively
performing either the copy or the merge operation, as a string.
DVI$_SHDW_DEVICE_COUNT
On Alpha and I64 systems, returns the total number of devices in the
virtual unit, including devices being added as copy targets, as a
longword.
DVI$_SHDW_GENERATION
On Alpha and I64 systems, returns the current, internal revision number
of the virtual unit, as a quadword.
DVI$_SHDW_MASTER
Returns a longword, which is interpreted as Boolean. The value 1
indicates that the device is a virtual unit named DSAnnnn:.
DVI$_SHDW_MASTER_MBR
On Alpha and I64 systems, returns the name of the master member device
(as a string) that is used for merge and copy repair operations and for
shadow set recovery operations.
DVI$_SHDW_MASTER_NAME
When the specified device is a shadow set member, $GETDVI returns the
device name of the virtual unit (DSAnnnn:) that represents the shadow
set of which the specified device is a member. $GETDVI returns a null
string if the specified device is not a member or is itself a virtual
unit (DSAnnnn:).
Note
Shadow set members must have a nonzero allocation class to operate in
an OpenVMS Cluster system. For more information, see HP Volume Shadowing for OpenVMS.
|
DVI$_SHDW_MBR_COPY_DONE
On Alpha and I64 systems, returns the percentage of the copy operation
that is complete on the current member unit, as a longword.
DVI$_SHDW_MBR_COUNT
On Alpha and I64 systems, returns the number of full source members in
the virtual unit, as a longword. Devices added as copy targets are not
full source members.
DVI$_SHDW_MBR_MERGE_DONE
On Alpha and I64 systems, returns the percentage of the merge operation
that has been completed on the member, as a longword.
DVI$_SHDW_MBR_READ_COST
On Alpha and I64 systems, returns the current value set for the member
unit, as a longword. This value can be modified to use a
customer-specified value.
DVI$_SHDW_MEMBER
Returns a longword, which is interpreted as Boolean. The value 1
indicates that the device is a shadow set member.
DVI$_SHDW_MERGE_COPYING
On Alpha and I64 systems, returns a longword, which is interpreted as
Boolean. The value 1 indicates that the device is a merge member of the
shadow set.
DVI$_SHDW_MINIMERGE_ENABLE
On Alpha and I64 systems, returns a longword, which is interpreted as
Boolean. The value 1 indicates that, if a system in the cluster that
has this device mounted crashes, the virtual unit will undergo a
minimerge and not a full merge.
DVI$_SHDW_NEXT_MBR_NAME
Returns the device name of the next member in the shadow set. If you
specify a virtual unit with the chan or
devnam argument, DVI$_SHDW_NEXT_MBR_NAME returns the
device name of a member of a shadow set. If you specify the name of a
shadow set member unit with the chan or
devnam argument, DVI$_SHDW_NEXT_MBR_NAME returns the
name of the next member unit or a null string if there are no more
members.
To determine all the members of a shadow set, first specify the virtual
unit (DSAnnnn:) to $GETDVI. Then, on subsequent calls, specify the
member name returned by the previous $GETDVI call until it returns a
null member name.
When the shadow set members have a nonzero allocation class, the device
name returned by $GETDVI contains the allocation class; the name has
the form $allocation-class$device. For example, if a shadow
set has an allocation class of 255 and the device name is DUA42,
$GETDVI returns the string $255$DUA42.
Note
Shadow set members must have a nonzero allocation class to operate in
an OpenVMS Cluster system. For more information, see HP Volume Shadowing for OpenVMS.
|
DVI$_SHDW_READ_SOURCE
On Alpha and I64 systems, returns the name of the member device that is
used for reads, at this point in time, as a string.
DVI$_SHDW_READ_SOURCE uses the unit that has the lowest value of the
sum of its queue length and read cost for reads. This is a dynamic
value.
DVI$_SHDW_TIMEOUT
On Alpha and I64 systems, returns the customer-specified timeout value
set for the device, as a longword.
If you do not set a value using the SETSHOWSHADOW utility, the SYSGEN
parameter SHADOW_MBR_TWO is used for member units and MVTIMEOUT is used
for virtual units.
DVI$_STS
Returns the device unit status as a 4-byte bit vector. Each bit in the
vector, when set, corresponds to a symbolic name that is defined by the
$UCBDEF macro. The following table describes each name:
| Symbol |
Description |
|
UCB$V_ALTBSY
|
Unit is busy via alternate startio path.
|
|
UCB$V_BSY
|
Unit is busy.
|
|
UCB$V_CANCEL
|
I/O on unit is canceled.
|
|
UCB$V_CLUTRAN
|
OpenVMS Cluster state transition in progress.
|
|
UCB$V_DEADMO
|
Deallocate at dismount.
|
|
UCB$V_DELETEUCB
|
Delete this UCB when reference count equals 0.
|
|
UCB$V_DISMOUNT
|
Dismount in progress.
|
|
UCB$V_ERLOGIP
|
Error log is in progress on unit.
|
|
UCB$V_EXFUNC_SUPP
|
Unit supports the EXFUNC bit.
|
|
UCB$V_FAST_PATH
|
Unit supports FAST PATH Affinity.
|
|
UCB$V_FP_HWINT
|
Unit supports FAST PATH hardware interrupt CPU Affinity.
|
|
UCB$V_INT
|
Interrupt is expected.
|
|
UCB$V_INTTYPE
|
Receiver interrupt.
|
|
UCB$V_IOPOST_LOCAL
|
Unit supports I/O post processing on the current CPU.
|
|
UCB$V_LCL_VALID
|
Volume is valid on the local node.
|
|
UCB$V_MNTVERIP
|
Mount verification is in progress.
|
|
UCB$V_MOUNTING
|
Device is being mounted.
|
|
UCB$V_MNTVERPND
|
Mount verification is pending on busy device.
|
|
UCB$V_NO_ASSIGN
|
Unit cannot have channels assigned to it.
|
|
UCB$V_ONLINE
|
Unit is on line.
|
|
UCB$V_PATHVERIP
|
Path verification is in progress for this device.
|
|
UCB$V_POWER
|
Power failed while unit busy.
|
|
UCB$V_SNAPSHOT
|
Restart validation is in progress.
|
|
UCB$V_SUPMVMSG
|
If set, suppress success type mount version messages.
|
|
UCB$V_SVPN_END
|
Last byte used from page mapped by system virtual page number (SVPN).
|
|
UCB$V_TEMPLATE
|
Template UCB from which other UCBs for this device type are made.
|
|
UCB$V_TIM
|
Timeout is enabled.
|
|
UCB$V_TIMOUT
|
Unit timed out.
|
|
UCB$V_UNLOAD
|
Unload volume at dismount.
|
|
UCB$V_VALID
|
Volume is software valid.
|
|
UCB$V_WRONGVOL
|
Wrong volume detected during mount verification.
|
|
UCB$V_WRTLOCKMV
|
Write-locked mount verification in progress.
|
DVI$_TOTAL_PATH_COUNT
On Alpha and I64 systems, the number of paths for a multipath-capable
device returns as an unsigned longword.
DVI$_TRACKS
Returns the number of tracks per cylinder as an unsigned integer
longword. This item code is applicable only to disks.
DVI$_TRANSCNT
Returns the transaction count for the volume as an unsigned integer
longword.
DVI$_QLEN
On Alpha and I64 systems, returns the queue length for the device as an
unsigned integer longword. Note that this value is the number of I/O
requests already in the driver and not the depth of the I/O pending
queue.
DVI$_TT_ACCPORNAM
Returns the name of the remote access port associated with a channel
number or with a physical or virtual terminal device number. If you
specify a device that is not a remote terminal or a remote type that
does not support this feature, $GETDVI returns a null string. The
$GETDVI service returns the access port name as a string. HP recommends
a buffer size of 64 bytes to return the name of the remote access port.
The $GETDVI service returns the name in the format of the remote
system. If the remote system is a LAT terminal server, $GETDVI returns
the name as server_name/port_name. The names are separated by
the slash (/) character. If the remote system is an X.29 terminal, the
name is returned as network.remote_DTE. For devices using
TCP/IP, the name is returned in the format Host: 192.168.1.100
Port: 1.
When writing applications, use the string returned by DVI$_ACCPORNAM
(instead of the physical device name) to identify remote terminals.
DVI$_TT_CHARSET
Returns, as a 4-byte bit vector, the character sets supported by the
terminal. Each bit in the vector, when set, corresponds to the name of
a coded character set. The $TTCDEF macro defines the following coded
character sets:
| Symbol |
Description |
|
TTC$V_HANGUL
|
DEC Korean
|
|
TTC$V_HANYU
|
DEC Hanyu
|
|
TTC$V_HANZI
|
DEC Hanzi
|
|
TTC$V_KANA
|
DEC Kana
|
|
TTC$V_KANJI
|
DEC Kanji
|
|
TTC$V_THAI
|
DEC Thai
|
DVI$_TT_CS_HANGUL
Returns a longword, which is interpreted as Boolean. A value of 1
indicates that the device supports the DEC Korean coded character set;
a value of 0 indicates that the device does not support the DEC Korean
coded character set.
DVI$_TT_CS_HANYU
Returns a longword, which is interpreted as Boolean. A value of 1
indicates that the device supports the DEC Hanyu coded character set; a
value of 0 indicates that the device does not support the DEC Hanyu
coded character set.
DVI$_TT_CS_HANZI
Returns a longword, which is interpreted as Boolean. A value of 1
indicates that the device supports the DEC Hanzi coded character set; a
value of 0 indicates that the device does not support the DEC Hanzi
coded character set.
DVI$_TT_CS_KANA
Returns a longword, which is interpreted as Boolean. A value of 1
indicates that the device supports the DEC Kana coded character set; a
value of 0 indicates that the device does not support the DEC Kana
coded character set.
DVI$_TT_CS_KANJI
Returns a longword, which is interpreted as Boolean. A value of 1
indicates that the device supports the DEC Kanji coded character set; a
value of 0 indicates that the device does not support the DEC Kanji
coded character set.
DVI$_TT_CS_THAI
Returns a longword, which is interpreted as Boolean. A value of 1
indicates that the device supports the DEC Thai coded character set; a
value of 0 indicates that the device does not support the DEC Thai
coded character set.
DVI$_TT_PHYDEVNAM
Returns a string containing the physical device name of a terminal. If
the caller specifies a disconnected virtual terminal or a device that
is not a terminal, $GETDVI returns a null string. $GETDVI returns the
physical device name as a string.
DVI$_UNIT
Returns the unit number as an unsigned longword.
DVI$_VOLCHAR
On Alpha and I64 systems, returns a 128-bit string (16 bytes) that
represents the volume characteristics or capabilities of the mounted
device. If a bit is set, the volume is capable of performing the
function.
DVI$_VOLCOUNT
Returns the number of volumes in the volume set as an unsigned
longword. This item code is applicable only to disks.
DVI$_VOLNAM
Returns the volume name as a string.
DVI$_VOLNUMBER
Returns the volume number of this volume in the volume set as an
unsigned integer longword. This item code is applicable only to disks.
DVI$_VOLSETMEM
Returns a longword, which is interpreted as Boolean. A value of 1
indicates that the device is part of a volume set; a value of 0
indicates that it is not. This item code is applicable only to disks.
DVI$_VOLSIZE
On Alpha and I64 systems, returns the current logical volume size of
the volume as an unsigned integer longword.
DVI$_VOLUME_EXTEND_QUANTITY
On Alpha and I64 systems, returns the number of blocks to be used as
the default extension size for all files on the volume as an unsigned
longword.
DVI$_VOLUME_MOUNT_GROUP
On Alpha and I64 systems, returns an unsigned longword, interpreted as
Boolean. A value of 1 indicates the volume is mounted /GROUP.
DVI$_VOLUME_MOUNT_SYS
On Alpha and I64 systems, returns an unsigned longword, interpreted as
Boolean. A value of 1 indicates the volume is mounted /SYSTEM.
DVI$_VOLUME_PENDING_WRITE_ERR
On Alpha and I64 systems, returns the count of pending write errors on
the volume as an unsigned longword.
DVI$_VOLUME_RETAIN_MAX
On Alpha and I64 systems, returns the maximum retention time for the
volume as specified with the DCL command SET VOLUME/RETENTION. Because
the returned time is in the standard 64-bit absolute time format,
specify 8 bytes for the buffer length field in the item descriptor.
DVI$_VOLUME_RETAIN_MIN
On Alpha and I64 systems, returns the minimum retention time for the
volume, as specified with the DCL command bit SET VOLUME/RETENTION.
Because the returned time is in the standard 64-bit absolute time
format, specify 8 bytes for the buffer length field in the item
descriptor.
DVI$_VOLUME_SPOOLED_DEV_CNT
On Alpha and I64 systems, returns the number of devices spooled to the
volume as an unsigned longword.
DVI$_VOLUME_WINDOW
On Alpha and I64 systems, returns the volume default window size as an
unsigned longword.
DVI$_VPROT
Returns the volume protection mask as a standard 4-byte protection mask.
DVI$_TT_xxxx
DVI$_TT_xxxx is the format for a series of item codes that return
information about terminals. This information consists of terminal
characteristics. The xxxx portion of the item code name
specifies a single terminal characteristic.