Guardian Procedure Calls Reference Manual

Table 44 SETMODE Functions (continued)
Parameters and EffectFunction
By default, checksums are validated from disk I/O operations. SETMODE function 158 request is ignored
for outstanding read operations. The file must be opened with unstrusctured-access option specified, even
if the file is unstructured. Function 158 does not support alternate-key files or partitions.
Override System Compression Default on 5190 Cartridge Tape162
no data compression= 1param1
data compression (IDRC)= 2
param2 is not used with function 162.
Users of unlabeled tapes who do not want to use the default compression setting can use SETMODE
function 162 to override the default setting. BACKUP and FUP do not support this operation. This operation
is allowed only at the beginning of tape (BOT). For more information about the 5190 Cartridge Tape
Subsystem, see the 5190 Cartridge Tape Subsystem Manual
SNAX:Enhanced CDI mode163
enables normal mode (disables all enhanced CDI support).= 0param1
enables enhanced CDI mode.= 1
enables special WRITEREAD mode (allows applications to determine
the setting of CDI by using the WRITEREAD procedure; using
= 2
WRITEREAD causes the outbound data buffer to be sent with CDI
enabled).
enables normal mode (disables all enhanced CDI support).= 0param1
enables enhanced CDI mode.= 1
enables special WRITEREAD mode (allows applications to determine
the setting of CDI by using the WRITEREAD procedure; using
= 2
WRITEREAD causes the outbound data buffer to be sent with CDI
enabled).
param2 is not used with function 163.
A SETMODE function 163 call applies only to the opener, not to the device that is opened; another
SETMODE function 163 call must be made if the file is closed.
Enhanced CDI mode is supported only by the SNAX/XF and SNAX/CDF products. For more information
about enhanced CDI mode, see the SNAX/XF Application Programming Manual and the SNAX/CDF
Application Programming Manual.
SNAX:Exception response (ER) mode165
disables ER mode. The LU sends outbound LU-LU FMD requests in
definite response (DR) mode. This is the default value if SCF or SPI
= 0param1
has not been used previously to configure ER mode; otherwise, the
SCF or SPI configuration value is used.
enables ER mode for applications existing before the introduction of
ER mode. The LU sends outbound LU-LU FMD requests in ER mode.
= 1
However, error 122 is sent on a negative response instead of error
951.
enables ER mode for applications using the ER mode features. The
LU sends outbound LU-LU FMD requests in ER mode. Error 951 is sent
on a negative response.
= 2
param2 is not used with function 165.
contains the previous value of param1.last-params[0]
contains the number of outbound requests required per device before
an ER mode sync point is automatically generated on behalf of the
user.
last-params[1]
1340 Guardian Procedure Calls (S)