SCF Reference Manual for the Storage Subsystem (G06.24+, H06.03+)

Storage Subsystem Commands
SCF Reference Manual for the Storage Subsystem—529937-007
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ALTER TAPE Command
application data buffer (in any processor) and the storage controller under direction
from the controlling IOP that is running in the same or a different processor.
Without direct bulk I/O, application data flows through an intermediate buffer in the
processor of the controlling IOP. This path might take longer to transfer bulk data,
but the advantage in using direct bulk I/O is that the processor of the controlling
IOP is freed to perform other operations.
LABELTAPE { ON | OFF }
specifies whether the system allows labeled-tape processing. The default is OFF.
When you enable or disable labeled-tape processing, you must:
•
Manually manage the tape server process $ZSVR.
•
First stop all tape drives.
See the procedure for Enabling or Disabling Labeled-Tape Processing on
page 13-13.
UPS { ON | OFF }
specifies whether the system performs special disk processing in the event of a
power failure. If ON, all disk devices must be powered by one or more
uninterruptible power supplies. The default of this attribute is determined by the
value of the DP2_UPSOPTION flag from the system globals.
ALTER SUBSYS Examples
•
To set BULKIO on:
-> ALTER $ZZSTO, BULKIO ON
•
To turn on labeled-tape processing:
-> ALTER $ZZSTO, LABELTAPE ON
•
To make internal disks plug and play:
-> ALTER $ZZSTO, AUTOCONFIGURE ON, AUTOSTART ON, &
-> AUTOREVIVE ON
See Automating Disk Configuration on page 6-6.
ALTER TAPE Command
The ALTER TAPE command changes the configured attribute values for a tape device
attached to your system. The syntax is:
Wild-card characters are supported.
ALTER [ / OUT file-spec / ] TAPE $tape
[ , LIKE object ] [ , attribute-spec ]...