Drive status : Polling

[pictux]

Hi all.
Today TSM server was freezed.
Opened Sessions were "blocked" (no data transfer) and a migration process was waiting for a tape mount.

Library is a 3582 with 2 drive.
Server is TSM 5.3.0 on Linux SLES 9.

So i look at the drive and i see that both were in status "Polling".

Library Name Drive Name Device Type On-Line
------------ ------------ ----------- -------------------
ULTRIUM ULTRIUM_DRI- LTO Polling
VE1
ULTRIUM ULTRIUM_DRI- LTO Polling
VE2

I try to update the drive status to online=y, but with no success.
After about 5 hours drive became On-Line Yes again and all restart to work properly.

What happens? Why?
What can do to prevent this situation again?
Thanks

King Regards
M

 

[moon-buddy]

When the migration process was waiting for a tape, what did q mount said?

 

[markul]

Perhaps SAN connectivity problems? I would check SAN switch logs, and /var/log/messages for problems reported by FC driver.

Kind regards,
M

 

[pictux]

Hi all and thanks for replies.
@moon-buddy: q mount said no volume mounted.
Anyway today i've checked physically the library and i find out that a drive was in error.

@markul: SAN/FC not present (for now :-D).

 

[pictux]

Here the Drive Error from TSM server actlog:

I/O error on library ULTRIUM (OP=C0106C03, CC=0, KEY=06, ASC=28, ASCQ=00, SENSE=70.00.06.00.00.00.00.0A.00.00.00.00.28.00.00.00.10.21., Description=An undetermined error has occurred)

 

[djchopps0013]

1) Is the cleaning light blinking. I have had many error when I had a drity drive in the library. Just clean and carry on.
2) Check to make sure your are using proper TSM drivers. Try updating if your daring, oh yes you will have to update TSM as well. Not best course of action, especially if you are many versions behind.
3) If drives are still under warranty/maintenance then call to just have drive replaced. I have found that most occasions you will waste hours upon hours trying to trouble shoot. I found it much easier taking the drive offline and having it replace and updating it to TSM, then I am done.

 

[pictux]

Hi all, and sorry for the delay.
Cleaning light was not blinking; i try anyway to clean drives.
I put library in offline mode, clean drives, and put in online mode again.
Now drives seems to be ok (both on-line):

Library Name Drive Name Device Type On-Line
------------ ------------ ----------- -------------------
ULTRIUM ULTRIUM_DRI- LTO Yes
VE1
ULTRIUM ULTRIUM_DRI- LTO Yes
VE2

but auditing library i have that error:
No drives are currently available in library ULTRIUM

[actlog output:
03/12/08 23:35:27 ANR8447E No drives are currently available in library
ULTRIUM. (PROCESS: 5)
03/12/08 23:35:27 ANR0985I Process 5 for AUDIT LIBRARY running in the
BACKGROUND completed with completion state FAILURE at
11:35:27 PM. (PROCESS: 5)
]

Later will start a migration process; then i'll see if drives will be used.
Any suggest?

Regards
M

 

[kfiresmith]

What does q path f=d return now that you've restarted TSM and cannot use your drives? I've seen SCSI errors screw up the paths a couple times. After the first time I created diagrams of what drive maps to what in /dev/ and taped it to the library so that I could re-define them quickly.

EDIT: I see that you posted the output of q drive f=d, I just wanted to make sure that you knew that that could return 'on-line', while q path f=d returns 'offline'

 

[pictux]

Hi and thanks for reply.
Thanks for the suggest; looking at the paths, that is the situation:
[select source_name, library_name, destination_name, device, online from paths]
SOURCE_NAME LIBRARY_NAME DESTINATION_NAME DEVICE ONLINE
-------------- ------------- ----------------- --------- --------
SERVER1 ULTRIUM /dev/IBMchanger0 YES
SERVER1 ULTRIUM ULTRIUM_DRIVE1 /dev/IBMtape0 NO
SERVER1 ULTRIUM ULTRIUM_DRIVE2 /dev/IBMtape1 NO

Anyway yesterday was done a restart of the server, and was reconfigured the scsi tape devices with the IBMtapeconfig.
Second drive does not work, with this error:

ANR8300E I/O error on library ULTRIUM (OP=C0106C03, CC=0, KEY=05, ASC=3B,ASCQ=0E,
SENSE=70.00.05.00.00.00.00.0A.00.00.00.00.3B.0E.00.00.00.00.,
Descrip-
tion=An undetermined error has occurred). Refer to Appendix D in the
'Messages' manual for recommended action.

while first drive work good.

I search for understand that error, looking also at the TSM : Messages reedbook, but sincerely i'm not able.

I read somewhere that after a device reconfiguration is better to recreate drive and path on TSM server, so i do that:
delete path and drive (for both drives):
update drive ULTRIUM ULTRIUM_DRIVE1 online=no
delete path SERVER1 ULTRIUM_DRIVE1 srct=server destt=drive libr=ULTRIUM
delete drive ULTRIUM ULTRIUM_DRIVE1

and recreate (both):
define drive ULTRIUM ULTRIUM_DRIVE1
define path SERVER1 ULTRIUM_DRIVE1 srctype=server desttype=drive libr=ULTRIUM device=/dev/IBMtape0 online=yes
update drive ULTRIUM ULTRIUM_DRIVE1 online=yes

After that all seems to work good again.
So, i think i've solved that problem.
At least for now.