I noticed this error still exists in TSM 6.3 – when an I/O error occurs that TSM is unable to access the defined drives, TSM updates the drive path offline and starts polling of the drives. Once the drive is accessible again, the drive is put back online but the drive path is left offline. To fix it, you have to manually update the path to online.
Here is a example:
tsm: TSM-SERVER>q drive
Library Name Drive Name Device Type On-Line
———— ———— ———– ——————-
IBMTS3500 DRIVE01 LTO Yes
IBMTS3500 DRIVE02 LTO Yes
IBMTS3500 DRIVE03 LTO Yes
IBMTS3500 DRIVE04 LTO Yes
IBMTS3500 DRIVE05 LTO Yes
IBMTS3500 DRIVE06 LTO Yes
tsm: TSM-SERVER>q path
Session established with server TSM-SERVER: Windows
Server Version 6, Release 3, Level 4.0
Server date/time: 08/22/2013 10:28:44 Last access: 08/22/2013 10:18:28
Source Name Source Type Destination Destination On-Line
Name Type
———– ———– ———– ———– ——-
TSM-SERVER SERVER IBMTS3500 LIBRARY Yes
TSM-SERVER SERVER DRIVE01 DRIVE Yes
TSM-SERVER SERVER DRIVE02 DRIVE No
TSM-SERVER SERVER DRIVE03 DRIVE Yes
TSM-SERVER SERVER DRIVE04 DRIVE Yes
TSM-SERVER SERVER DRIVE05 DRIVE Yes
TSM-SERVER SERVER DRIVE06 DRIVE Yes
tsm: TSM-SERVER>q path TSM-SERVER drive02 f=d
Source Name: TSM-SERVER
Source Type: SERVER
Destination Name: DRIVE02
Destination Type: DRIVE
Library: IBMTS3500
Node Name:
Device: mt5.0.0.6
External Manager:
ZOS Media Server:
Comm. Method:
LUN:
Initiator: 0
Directory:
On-Line: No
Last Update by (administrator): SERVER_CONSOLE
Last Update Date/Time: 12/09/2012 10:58:31
tsm: TSM-SERVER>update path TSM-SERVER drive02 srctype=server desttype=drive library=ibmts3500 device=mt5.0.0.6 online=yes
ANR1722I A path from TSM-SERVER to IBMTS3500 DRIVE02 has been updated.
tsm: TSM-SERVER>q path
Source Name Source Type Destination Destination On-Line
Name Type
———– ———– ———– ———– ——-
TSM-SERVER SERVER IBMTS3500 LIBRARY Yes
TSM-SERVER SERVER DRIVE01 DRIVE Yes
TSM-SERVER SERVER DRIVE02 DRIVE Yes
TSM-SERVER SERVER DRIVE03 DRIVE Yes
TSM-SERVER SERVER DRIVE04 DRIVE Yes
TSM-SERVER SERVER DRIVE05 DRIVE Yes
TSM-SERVER SERVER DRIVE06 DRIVE Yes
Jackie Chen's IT Workshop 
Thanks……Very simple way……..it help more than help in TSM
Thank You! Your’re my TSM hero 😀
tks very much….you must help tsm team to write a “normal” tsm guide
Gracias, funciono bien.
Thank you,
Thank you…
Excelente, gracias.
thanks. its simple to troubleshoot
You are a lifesaver. We just shut down our server (moving) and after that our path stayed in offline. Now restore is working again.
thanks !!!!
What if you Have Multiple drives offline is there one command to bring all drives online at the same time for do i have to do this for each?
Thank you so much!
thankyou so much!
thank u ❤
Thank u ❤