Hi,
you're right. We've tested that for your /dev/rmtxx Drives and it worked.
But in our test we've lost also the path to media-changer /dev/smc0. So we were
not able to work with the Library. Withou the key you can't use the "Alternate
Pathing" for /dev/smcx.
Mit freundlichen Grüßen / With kind regards
______________________________________
Boris Herrmann
Produktion / Heterogene Systeme
ARAG IT GmbH
ARAG Platz 1, 40472 Düsseldorf
Tel: +49 (0)211 964-1137
Fax: +49 (0)211 964-1155
Boris.Herrmann AT ARAG DOT de
www.ARAG.de
Geschäftsführer: Ottmar Liebler, Hanno Petersen
Sitz und Registergericht: Düsseldorf, HRB 10934
USt-ID-Nr.: DE 119 356 473
-----Ursprüngliche Nachricht-----
Von: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] Im Auftrag
von Josef Weingand
Gesendet: Montag, 5. Februar 2007 09:55
An: ADSM-L AT VM.MARIST DOT EDU
Betreff: Re: [ADSM-L] AW: [ADSM-L] 3592 Path Failover for Dual Ports
Hi,
for IBM 3592 (TS1120) Tape Drives you don't need any DPF Key. You just need to
enable the alternate pathing support with "chdev -l rmt1 -a alt_pathing=yes"
Then your drives rmt10 and rmt50 are connected somehow together and in TSM you
only configure one drive (either rmt10 or rmt50).
With DPF you will get Failover and Loadbalancing function. With the TSM
function SANdiscovery you will get failover only.
See also Implementing IBM Tape in UNIX Systems, SG24-6502-03 Redbook, published
18 October 2005,
Mit freundlichen Grüßen / Kind regards
Josef Weingand
Senior IT Specialist
Technical Sales Systems Storage
IBM Deutschland
Mobil +49 171 55 26 783 - Homeoffice Tel. +49 8845 757421
Fax +49 171 13 5526783
email: weingand AT de.ibm DOT com
SMS/eMail: 01715526783 AT t-d1-sms DOT de
"Herrmann, Boris"
<Boris.Herrmann@A
RAG.DE> To
Sent by: "ADSM: ADSM-L AT VM.MARIST DOT EDU
Dist Stor cc
Manager"
<[email protected] Subject
.EDU> [ADSM-L] AW: [ADSM-L] 3592 Path
Failover for Dual Ports
05.02.2007 09:14
Please respond to
"ADSM: Dist Stor
Manager"
<[email protected]
.EDU>
Hallo all,
and thanks for the feedback.
Unforunately we don't have the necessary key for that feature.
But there is another nice option to resolve this problem with TSM. IBM told me
to set the option "SANdiscovery" in the dsmserv.opt to "ON". After setting this
option to on, you can see every SAN Device (Q SAN) with it's serialnumbers etc.
(in your example we see that the drive /dev/rmt10 and /dev/rmt50 have the same
serialnumbers). Now if /dev/rmt10 is not available, TSM detects that /dev/rmt50
has the same serialnumber and automatically update the PATH to /dev/rmt50.
Mit freundlichen Grüßen / with kind regards,
______________________________________
Boris Herrmann
Produktion / Heterogene Systeme
ARAG IT GmbH
ARAG Platz 1, 40472 Düsseldorf
Tel: +49 (0)211 964-1137
Fax: +49 (0)211 964-1155
Boris.Herrmann AT ARAG DOT de
www.ARAG.de
Geschäftsführer: Ottmar Liebler, Hanno Petersen
Sitz und Registergericht: Düsseldorf, HRB 10934
USt-ID-Nr.: DE 119 356 473
-----Ursprüngliche Nachricht-----
Von: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] Im Auftrag
von PAC Brion Arnaud
Gesendet: Mittwoch, 31. Januar 2007 09:33
An: ADSM-L AT VM.MARIST DOT EDU
Betreff: Re: [ADSM-L] 3592 Path Failover for Dual Ports
Hi Boris,
Datapath failover is possible, on condition having bought the feature with your
3584 library.
First of all, check if you got the necessary key to enable the feature (should
be written on a sticker on the inside of rear side of your
library)
Then, to enable datapath failover, in AIX issue : dpf_keys -a key_number
To enable datapath failover on a drive : chdev -l rmt1 -a alt_pathing=yes
To enable control path failover on a smc device : chdev -l smc1 -a
alt_pathing=yes
to enable on all drives in one shot : /usr/lpp/Atape/instAtape -a
This is described in the IBM Ultrium device drivers Installation and user's
guide (GA32-0430-0.3)
Hope this helped ...
Cheers.
Arnaud
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CIT Department Viadukstrasse 42, P.O. Box 4002 Basel/CH
Phone: +41 (61) 226 11 11, FAX: +41 (61) 226 17 01
Direct: +41 (61) 226 19 78
e-mail: arnaud.brion AT panalpina DOT com
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-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Herrmann, Boris
Sent: Wednesday, 31 January, 2007 08:38
To: ADSM-L AT VM.MARIST DOT EDU
Subject: 3592 Path Failover for Dual Ports
Hi everyone,
we have a complete new TSM evironment:
-AIX 5.3
-TSM 5.3.4
-Library 3584
-8 x 3592 Tape Drives with Dual Port (recommendend from our Sales Assistant to
handle Failovers of Cables, Ports, ...) -Atape Driver 10.3.5.0
I'm not a SAN specialist, so I hope I'll take the correct words to express the
problem/request. Our Unix colleagues have installed and configured AIX and
Atape. Every Drive was connected with both Ports to two different "Fabrics". So
each Drive is seen in AIX two times with different names. For
example:
Port0 of the Drive => /dev/rmt10
Port1 of the Drive => /dev/rmt50
Today in TSM I've configured all Drives on Port 0 (/dev/rmt10 - /dev/rmt17). Is
there a way that TSM or AIX can automatically handle a Path Failover for Ports?
My AIX colleagues told me, that under AIX is no way to use the same device (for
example /dev/rmt10) in a Path Failover for Ports as /dev/rmt10. I than must use
/dev/rmt50). In TSM I don't know any mechanism to automatically handle that
problem. I missed something in the TSM PATH definition like "If /dev/rmt10 is
not available so use automatically /dev/rmt50). Any ideas.
Thanks,
Boris
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