new LTO8 tapes underutilised

[rstephrf]

Hi, we have just installed a new TS4500 with 2 x LTO8 drives and media.
We've just noticed its marking tapes full well below their capacity:
EG: 015770M8 GPFS_LTO LTO 121.7 G 100.0 Full
015771M8 GPFS_LTO LTO 149.6 G 100.0 Full
015772M8 GPFS_LTO LTO 156.9 G 100.0 Full

DEVCLASS
Device Class Name: LTO
Device Access Strategy: Sequential
Storage Pool Count: 1
Device Type: LTO
Format: ULTRIUM8C

STGPOOL:
Storage Pool Name: GPFS_LTO
Storage Pool Type: Primary
Device Class Name: LTO
Storage Type: DEVCLASS

OS is Linuc RHEL 7.7. "Lin_tape" was updated.

So far no joy from IBM. If anyone has any adviced greatly appreciated.


thanks rob

 

[Trident]

Hi,
I have lto8 drives, and I have no issues. I am missing your est/max cap settings.

My devcla looks like this:

Protect: TSM>q devcl LTO8C f=D

Device Class Name: LTO8C
Device Access Strategy: Sequential
Storage Pool Count: 2
Device Type: LTO
Format: ULTRIUM8C
Est/Max Capacity (MB): 12,582,912.0
Mount Limit: DRIVES
Mount Wait (min): 20
Mount Retention (min): 2
Label Prefix: ADSM
Library: LIB-LTO8
Directory:
Server Name:
Retry Period:
Retry Interval:
Shared:
High-level Address:
Minimum Capacity:
WORM: No
Drive Encryption: Allow
Scaled Capacity:
Primary Allocation (MB):
Secondary Allocation (MB):
Compression:
Retention:
Protection:
Expiration Date:
Unit:
Logical Block Protection: Read/Write
Connection Name:
Cloud Storage Class:
Last Update by (administrator): USER
Last Update Date/Time: 04/12/2023 10:13:52