Tape Storage

Help! My backup set is continually getting larger and we are quickly burning through scratch tapes. I am using IMB3573. 

Tom Lansing

Hi,

In short terms, you need to make sure the get filled up to 100%.  One classical reason is that collocation is turned on.  This is good for restore speed and minimizing tape mounts, but will, as you say, eat all your scratch tapes.  For the tape stg pool, look for the setting 'collocation', and reclaim settings.

Upd stg tapepool recla=50 collocate=no

A low reclaim valyou will eat tapedrives.  You may want to start of higher, and work downwards.

Håkon

Thanks!

I'll make that setting change and give it another go! I hadn't considered working downwards. Good call. 

-Tom

Hi Hakon,

As you said to setup for utilization the whole tape we have to run the command which you suggested any syntax for which i  can check right now what is the settings exist the same issue is with me also 1.2 TB tape we have sometimes it consume hardly .02% and says tape is full.

Regards

Prem Singh

Hi,

Check tape status for tape in question:  q vol TAPELABEL f=d

The access and status is what you should look at.

You can try a manual reclaim to see what actlog shows.

reclamin stg stgpoolname th=98

Look for the process number in actlog.

q actlog begint=-1 se='s: PROCCESS'

Or you can try to move the data manually with the move command

move data command

Håkon Ph. Tønder-Keul

TSM Manager @ Basefarm

Hi Hakon,

This is what i have after executing the command.

tsm: ITSM01>q vol kg1649l4 f=d

                   Volume Name: KG1649L4
             Storage Pool Name: VMPOOL
             Device Class Name: LTO_CLASS_1
            Estimated Capacity: 1.6 T
       Scaled Capacity Applied:
                      Pct Util: 31.3
                 Volume Status: Filling
                        Access: Read/Write
        Pct. Reclaimable Space: 4.7
               Scratch Volume?: No
               In Error State?: No
      Number of Writable Sides: 1
       Number of Times Mounted: 350
             Write Pass Number: 32
     Approx. Date Last Written: 12/19/2015 10:15:45
        Approx. Date Last Read: 12/15/2015 10:11:04
           Date Became Pending:
        Number of Write Errors: 0
         Number of Read Errors: 0
               Volume Location:
Volume is MVS Lanfree Capable : No
Last Update by (administrator): HARIOM
more...   (<ENTER> to continue, 'C' to cancel)

         Last Update Date/Time: 05/05/2015 12:00:40
          Begin Reclaim Period:
            End Reclaim Period:
  Drive Encryption Key Manager: None

Regards

Prem Singh

As lon as these settings are like this:

                 Volume Status: Filling
                        Access: Read/Write

The tape will not be reclaimed before status= Full

Just let it sit there. TSM will add data to it in due time.

Håkon Ph. Tønder-Keul

TSM Manager @ Basefarm