Tape Storage

Hi Experts,

I am looking for your help to understand my query I am not able to co-releate the background function.

here is the snapshot of one of my storage pool.

tsm: ITSM01>q v stg=sqldbpool

Volume Name               Storage      Device      Estimated    Pct   Volume
                          Pool Name    Class Name   Capacity   Util   Status
------------------------  -----------  ----------  ---------  -----  --------
CI2982L4                  SQLDBPOOL    LTO_CLASS       3.2 T    0.1    Full
CI2998L4                  SQLDBPOOL    LTO_CLASS     843.2 G   36.5    Full
KG1647L4                  SQLDBPOOL    LTO_CLASS       1.6 T    5.4  Filling
KG3852L4                  SQLDBPOOL    LTO_CLASS       4.3 T    1.7    Full
KG5063L4                  SQLDBPOOL    LTO_CLASS       1.6 T    0.5  Filling
KG5064L4                  SQLDBPOOL    LTO_CLASS       3.6 T   12.6    Full
KG5065L4                  SQLDBPOOL    LTO_CLASS       1.6 T   35.1  Filling
MY5194L4                  SQLDBPOOL    LTO_CLASS       0.0 M    0.0   Empty
MY5198L4                  SQLDBPOOL    LTO_CLASS       2.6 T    9.9    Full
MY5200L4                  SQLDBPOOL    LTO_CLASS     816.9 G    2.3    Full

I wanted to know why old tapes which is not in Library or moved out from library still shows here.(that's a default function or did I do something wrong)

any way out i can get only those tape details which is in use in specific storage pool. due to this lods of confusion is creating few tapes showing filling which is a big problem in reality only one tape will fill in one time. pls do let me know if any clarification is required.

I run the audit many times but no luck.

 

Regards

Prem

Hi,

 

is this a primary pool or a copy pool? You should not remove tapes from the library which still contains data in a primary pool. If you check in all the tapes in the pool with status filling or full, you can reclaim the space or move data to another volume.

 

Rgd.
Espen

Hi Espen,

Can you pls help me to provide the syntax for reclaim on a specific volume/stgpool.

This is my storage pool details.

tsm: ITSM01>q stgpool

Storage      Device       Estimated    Pct    Pct  High  Low  Next Stora-
Pool Name    Class Name    Capacity   Util   Migr   Mig  Mig  ge Pool
                                                    Pct  Pct
-----------  ----------  ----------  -----  -----  ----  ---  -----------
DISKPOOL_VM  DISK             512 G    0.0    0.0    70   50  VMPOOL
LOTUSDOMINO  LTO_CLASS-    12,800 G    8.4   50.0    90   70
              _1
MAILPOOL     LTO_CLASS-   196,439 G   52.0   70.2    90   70
              _1
SQLDBPOOL    LTO_CLASS   22,400,816    0.0    0.1    90   70
                                  G
VMDOMINOFI-  LTO_CLASS-     8,000 G    1.4   20.0    90   70
 NAL          _1
VMPOOL       LTO_CLASS-    40,745 G   16.7   57.6    90   70
              _1

I didn't understand this "You should not remove tapes from the library which still contains data in a primary pool".

Regards

Prem

 

reclaim

where with duration you specify how long to run the process of reclamation

reclaim stg sqldbpool th=90

Then monitor the process with:
q pr
q ac

Rgd.
Espen

Hi Espen,

Pls find the output i checked and verified no tape was mounted.

tsm: ITSM01>reclaim stg sqldbpool th=90
ANR3512E RECLAIM STGPOOL: Error encountered in accessing data storage -
insufficient number of mount points available for removable media.
ANS8001I Return code 14.

Regards

Prem

Hi,

 

this means the system is unable to mount the tapes in a tape drive. You can check the status with these commands:

 

q lib
q dr
q path
q mount

Rgd.
Espen

Espen,

I am sharing the output on these commands I didn't find any clue.

tsm: ITSM01>q path

Source Name     Source Type     Destination     Destination     On-Line
                                Name            Type
-----------     -----------     -----------     -----------     -------
ITSM01          SERVER          3573LIB         LIBRARY         Yes
ITSM01          SERVER          DRIVE1          DRIVE           Yes

tsm: ITSM01>q dr

Library Name     Drive Name       Device Type     On-Line
------------     ------------     -----------     -------------------
3573LIB          DRIVE1           LTO             Yes

tsm: ITSM01>q libr

         Library Name: 3573LIB
         Library Type: SCSI
               ACS Id:
     Private Category:
     Scratch Category:
WORM Scratch Category:
     External Manager:
       RSM Media Type:
               Shared: Yes
              LanFree:
   ObeyMountRetention:

as of now no tape is mounted here is the output.

tsm: ITSM01>q mo
ANR2034E QUERY MOUNT: No match found using this criteria.

Regards

Prem

 

 

 

 

what tape library do you use and what is the number of drives whitin your
library?

On Monday, June 20, 2016, Espen Wallin

Hi Chavdar,

I am using IBM TS 3100 library within that one drive is there.

Regards

Prem

Hi Prem,
with single drive library is hard to perform reclamation, so to preform
reclamation you need at least two drives.
You still can reclamation, but procedure is ... see below...
You to reclaim primary storage pool you will need:
1. addition disk space (I strongly recommend to use separate LUN) with size
at lease size of single tape for example if you tape device is LTO5 you
will need LUN with ~ 3 TB
2. you need to create new device class and additional storage pool for
reclamation
- def devc recl_devc devt=file maxcap=40G (could be different)
3. define stg recl_stg recl_devc maxscr=74 (74 is calculated as 3TB/40G ->
from maxcap when you defined device class)
4. update stg sqldbpool reclaimstg=recl_stg
5. start reclamation as recl stg sqldbpool th=90 (start from 90% and
continue to 85%, 80% and so on)
6. Monitor recl_stg pool utilization if it hits 90% stop reclamation
7. update storage pool as update stg recl_stg next=sqldbpoo
8. migrate stg recl_stg low=0, it will move reclaimed data to tape pool.
9. update storage pool as update stg recl_stg next=""
10. repeat steps from 5 to 9. to free tapes.

I know it is ugly procedure ... but IBM strongly recommends to have min two
tape drives. As far as I know TS3100 supports two half-high drives and it
is good if you can have one more drive
Have a good day
Chavdar


On Mon, Jun 20, 2016 at 11:45 AM, Prem Singh

Hi Chavdar,

Thanks for your detail information IBM solution architect has recomended this kind of architecture even I am not sure why he has recomended in that way. I don't have much space assign to LUN as of now. thank you very much for your response. yes you are right process is very lengthy.

Regards

Prem