ADSM-L

Re: tsm tape path problems

2005-07-07 10:48:49
Subject: Re: tsm tape path problems
From: Alexander Lazarevich <alazarev AT ITG.UIUC DOT EDU>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Thu, 7 Jul 2005 09:48:35 -0500
William, et all,

Thanks for your great responses, I think I'm closer to getting it working,
but I still need a little more help.

I understand what you are saying about updating the paths, but the problem
is I already removed the old paths and devices (xxx.0.0.3), and created
the new devices and paths (xxx.0.0.5). So I think doing an update path is
out of the question. I'm stuck trying to associate the new devices with
the old server, which should be possible right?

So, I've removed all devices and paths, rebooted, then added all devices
and paths (for the xxx.0.0.5 devices), rebooted again, and now TSM seems
to think the devies and paths are correct:

tsm: ITG-TSM>q library
      Library Name: LB6.0.0.5
      Library Type: SCSI
            ACS Id:
  Private Category:
  Scratch Category:
  External Manager:
    RSM Media Type:
            Shared: No
           LanFree:
ObeyMountRetention:

tsm: ITG-TSM>q drive
Library Name     Drive Name       Device Type     On-Line
------------     ------------     -----------     -------------------
LB6.0.0.5        MT1.0.0.5        LTO             Yes
LB6.0.0.5        MT2.0.0.5        LTO             Yes

tsm: ITG-TSM>q path
Source Name     Source Type     Destination     Destination     On-Line
                                Name            Type
-----------     -----------     -----------     -----------     -------
ITG-TSM         SERVER          LB6.0.0.5       LIBRARY         Yes
ITG-TSM         SERVER          MT1.0.0.5       DRIVE           Yes
ITG-TSM         SERVER          MT2.0.0.5       DRIVE           Yes

But something is still not right, because when I run an audit of the "new"
library, the process completes, but it does nothing to the library, the
library doesn't move in inch, it is not talking to the library correctly:

ANR2017I Administrator DUDE issued command: AUDIT LIBRARY lb6.0.0.5
checklabel=yes
ANR0984I Process 5 for AUDIT LIBRARY started in the BACKGROUND at
09:41:03.
ANR8457I AUDIT LIBRARY: Operation for library LB6.0.0.5 started as process
5.
ANR8461I AUDIT LIBRARY process for library LB6.0.0.5 completed
successfully.
ANR0985I Process 5 for AUDIT LIBRARY running in the BACKGROUND completed
with completion state SUCCESS at 09:41:03.

I'm wondering if my device class is not correct in some way?:

tsm: ITG-TSM>q dev

Device       Device        Storage    Device       Format     Est/MaxMount
Class        Access           Pool    Type                   CapacityLimit
Name         Strategy        Count                               (MB)
---------    ----------    -------    ---------    ------    --------------
DISK         Random              3
LTOCLASS1    Sequential          1    LTO          DRIVE            DRIVES


Any other ideas?

Thanks!

Alex



On Thu, 7 Jul 2005, William Boyer wrote:

One thing I have found with Windows is after any type of hardware change, 
whether it is a replacement or just firmware updates,
Windows seems to not recognize it as the same device, and creates new ones for 
this same (upgraded) hardware. If you just give the
TSM server a few minutes to time out on trying to initialize the library, then 
you can update the library path to the new device=
and then update the drive paths to the new device=.

I've started stopping TSM, removing the library/drives from Device manager in 
Windows, doing the upgrade/replace and rebooting. I've
found that Windows assigns the same devices. Then I just restart TSM and verify 
that all is well.

I don't know if persistent mappings with the fibre adapter (if you are running 
fibre drives) would resolve this issue...


Bill Boyer
"Some days you're the bug, some days you're the windshield" - ??

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of 
Alexander Lazarevich
Sent: Wednesday, July 06, 2005 11:21 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: tsm tape path problems

TSM 5.1.9.0 on win2K server. Overland Neo 4100 with 2 LTO-2 drives.

I've got a bad problem, and I'm stuck trying to read the manual for clues but 
I'm having trouble finding what I need to know and I
could really use a point in the right direction.

TSM has been running just fine since I set it up more than two years ago.
I used the TSM wizard to set everything up, and it was quite easy. Last week we 
had an LTO-2 drive failure, some bad cables, and an
intermittent library controller card. All those hardware issues have been fixed.

But somewhere in the mess of fixing all the hardware issues, the TSM /windows 
drivers for the devices got confused, and TSM is now
recognizing the library and the drives as different device names. Whereas TSM 
used to call the devices: lb6.0.0.3 (library),
mt1.0.0.3 (drive 1), and mt2.0.0.3 (drive 2); TSM is now calling those devices 
lb6.0.0.5, mt1.0.0.5, and mt2.0.0.5.

I've tried everything I know of to fix the path between the server and the 
"old" devices (lb6.0.0.3), but nothing I tried worked.
So, I then set out to try and define new path's for the "new" devices 
(lb6.0.0.5). I've done the following:

- Define the new library and drives, giving them the proper names
  and element ID's.
- Update the server's LTO Device Class, giving it the new library name
  lb6.0.0.5.
- Add the new path's for the drives and the library:
tsm: ITG-TSM>q path

Source Name     Source Type     Destination     Destination     On-Line
                                Name            Type
-----------     -----------     -----------     -----------     -------
ITG-TSM         SERVER          LB6.0.0.5       LIBRARY         Yes
ITG-TSM         SERVER          MT1.0.0.5       DRIVE           Yes
ITG-TSM         SERVER          MT2.0.0.5       DRIVE           Yes

But then I try to run an audit of the new library, and I get nothing:

ANR2017I Administrator ALAZAREV issued command: AUDIT LIBRARY lb6.0.0.5 
ANR0984I Process 5 for AUDIT LIBRARY started in the
BACKGROUND at 21:42:02.
ANR8457I AUDIT LIBRARY: Operation for library LB6.0.0.5 started as process 5.
ANR8461I AUDIT LIBRARY process for library LB6.0.0.5 completed successfully.
ANR0985I Process 5 for AUDIT LIBRARY running in the BACKGROUND completed with 
completion state SUCCESS at 21:42:02.

The audit did nothing, as it starts and completes within a second. The library 
didn't move an inch.

Obviously, I'm not setting up the paths properly, or the devices classes, or 
something. What I find odd is that when I run the
Device Configuration Wizard, TSM does not find any devices. That is different 
from when I first installed TSM, when it found all
devices automatically for me.

I'm going to read Chapter 4 of the admin guide tonight when I go home, but I've 
already looked at it, and I can't find the
information I need described in a clear manner. Any help anyone could provide, 
even just pointing me to some good documentation, I
would appreciate it.

Sorry to be a pest, but I'm in trouble, as our backups are down and I need a 
little help getting it back up.

Thanks in advance,

Alex


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