Console Commands › Console Commands › DISPLAY BACKSTORE

DISPLAY BACKSTORE

This command displays details about active Backstore tasks. The information includes work in progress, status, work queued for a task, and tape devices in use.

Syntax

SVTn Display Backstore

Example of information displayed by the DISPLAY BACKSTORE command

SVT2 D B                                                  
SVT2X0100I Command Complete
SVT2A1600I 331
Task Module TCB LDS Description
01 SVTSPTU 007F9110 01 Writing   100001
                       Status:  Opening Tape
                       Queued:  Writing   - Group=62 Subgroup=S
                       Dataset  DDname   Devn Volser Seq  SIOs  %
                    (E)PRIMARY  SYS00001 3725 540572 0001 00050 000
                       DUPLEX   SYS00002 3706        0000 00013 000
SVT2A1603I Tasks(01) Drives Inuse(02) Max Drives(12) 332
           Bypass Offline(Y) FullMaxdrivesEnforcement(N)
           RecallServer(Client)
 
SVTn D B
SVTnX0101I Command Scheduled in SVTS
SVTnX0100I Command Complete
SVTnA1600I 219
Task Module TCB LDS Description
01 SVTSPTU 006E5878 01 Writing 104918
                       Status: Export IO
                       Queued: Writing - Group=12 Subgroup=S
                       Dataset DDname Devn Volser Seq SIOs %
                    (E)PRIMARY SYS00021 074B 509521 0009 00166 100
                    (E)DUPLEX  SYS00022 0750 502920 0010 00166 100
                       EXPORT  SYS00023 0748 505157 0001 01635 087
SVT2A1603I Tasks(01) Drives Inuse(02) Max Drives(12) 332
           Bypass Offline(Y) FullMaxdrivesEnforcement(N)
           RecallServer(Client)

Notable facts about the sample output:

• Only one task, task 01, is currently active. Up to 99 tasks can be active and displayed. Once assigned a task number the task number is kept through the life of the task. If task 01 is for Externalization, task 02 is for Recall, and task 03 is for Externalization, when the Recall task completes, the command will display tasks 01 and 03.
• The purpose of the displayed task is to Externalize Virtual Volume 100001 which is assigned to Group 62, Subgroup Short.
• Duplexing is active for this group since PRIMARY and DUPLEX tape lines are being displayed.
• The tape line display includes the DD name, device number, tape VOLSER, tape file sequence number, number of Start I/O's, and percent of the Virtual Volume that has been externalized. If half of the Virtual Volume had been externalized when the Display Backstore command was issued, the percent displayed would be 50.
• The tape currently being opened by the task is for the DUPLEX since the DUPLEX VOLSER is not filled in, yet.
• The (E) at the start of the PRIMARY and DUPLEX lines indicates that these tapes will be encrypted.
• The display is completed with an environmental summary of the total active tasks, the number of tape drives in use, and various parmlib attribute settings that directly relate to the Backstore Engine.
• Since the Backstore Engine being displayed has RecallServer=Client set, it will normally not display a Recall task since Recalls will be performed by the Backstore Engine running with RecallServer=Server.