Rick,
if the server has not mounted the tape for the session it does not
automatically mean the drive is free. Backup session over SAN means for
me:
- the system with SAN session is backing up big ammounts of data
- tape library is shared
- the SAN backups go direct-to-tape (SANergy shared filepool is stil rare)
- it is possible SAN backups to utilize more than one drive
So the storage agent can use those tape drives during LAN-free backups.
BTW: I cannot believe your "SAN" session is actually going LAN-free - in
LAN-free scenario first session to the TSM server is communicating the
metadata, while the second with the TSM Storage Agent is transmitting the
bulk load. Your 115 GB in "Bytes Recvd" colums are way too high for
LAN-free.
Zlatko Krastev
IT Consultant
Rick Harderwijk <rharderwijk AT FACTOTUMMEDIA DOT NL>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
27.08.2003 13:46
Please respond to "ADSM: Dist Stor Manager"
To: ADSM-L AT VM.MARIST DOT EDU
cc:
Subject: Re: Waiting for media? Why?
Zlatko,
The sessions have ended, but session 3 was a backup session over SAN,
session 41 started as soon as session 3 was finished. It seems to me that
TSM is seeing only one drive for some weird reason.
Regards,
Rick
-----Oorspronkelijk bericht-----
Van: Zlatko Krastev [mailto:acit AT ATTGLOBAL DOT NET]
Verzonden: 27 augustus 2003 9:23
Aan: ADSM-L AT VM.MARIST DOT EDU
Onderwerp: Re: Waiting for media? Why?
Are you sure it is not waiting for the media used by session 3? Also I've
seen mounts postponed during audit library.
What is/was 'q se 3 f=d', 'q se 41 f=d', 'q mo' & 'q pr'?
Zlatko Krastev
IT Consultant
Rick Harderwijk <rharderwijk AT FACTOTUMMEDIA DOT NL>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
27.08.2003 09:18
Please respond to "ADSM: Dist Stor Manager"
To: ADSM-L AT VM.MARIST DOT EDU
cc:
Subject: Waiting for media? Why?
Hi,
I just looked at this output on my TSM 4.2.1.12 (Windows) server:
Output Q Sess
Sess Comm. Sess Wait Bytes Bytes Sess Platform Client Name
Number Method State Time Sent Recvd Type
------ ------ ------ ------ ------- ------- ----- --------
-------------------
1 Tcp/Ip IdleW 6,7 M 8,8 K 2,5 K Serv- Windows Server_1
er NT
2 Tcp/Ip IdleW 6,7 M 8,8 K 2,5 K Serv- Windows Server_2
er NT
3 Tcp/Ip RecvW 0 S 15,3 K 115,0 G Node WinNT Server_1_W2K
7 Tcp/Ip Run 0 S 61,9 K 108 Admin WinNT Admin
41 Tcp/Ip MediaW 1,3 H 352 735 Node WinNT Server_3_W2K
43 Tcp/Ip IdleW 1,5 M 533 410 Node WinNT Server_1_W2K
49 Tcp/Ip Run 0 S 130 124 Admin WinNT Admin
and I find session 41 a bit odd. Why is it waiting for media, when I have
2
LTO drives available in my 3583 library? Server_1 and Server_2 are SAN
clients, Server_3 is a LAN client. This is my PATH config, and this has
worked before:
Source Name Source Type Destination Destination On-Line
Name Type
----------- ----------- ----------- ----------- -------
Server_2 SERVER DRIVE0 DRIVE Yes
Server_2 SERVER DRIVE1 DRIVE Yes
Server_2 SERVER DRIVE2 DRIVE Yes
Server_1 SERVER DRIVE0 DRIVE Yes
Server_1 SERVER DRIVE1 DRIVE Yes
Server_1 SERVER DRIVE2 DRIVE Yes
Q DRIV:
Library Name Drive Name Device Type On-Line
------------ ------------ ----------- ------------
3583LIB DRIVE0 LTO Yes
3583LIB DRIVE1 LTO Yes
3583LIB DRIVE2 LTO Yes
We have been experiencing some problems with TSM but after replacing a
GBIC
on the SAN switch all worked again. I had one issue with the audit library
command: it never seemed to end (it ran for about 18 hours after which I
cancelled the process, because session 3 ( a backup that restarted after
the
reboot that didn't start before because it didn't find any drives (the
paths
where not online, so I didn't think that was odd) was also (!) waiting for
media - with drives available to mount a tape. Could the unfinished /
hanging / aborted audit library cause the issue in this case? Or is
something else going on?
If you need any further info, don't hesitate to ask...
Kind regards,
Rick Harderwijk
Systems Administrator
Factotum Media BV
Oosterengweg 44
1212 CN Hilversum
P.O. Box 335
1200 AH Hilversum
The Netherlands
Tel: +31-35-6881166
Fax: +31-35-6881199
E: rharderwijk AT factotummedia DOT nl
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