As far as i know AIX doesn't support automatic failover for tape devices by
default. For this to accomplish you need to build it yourself, or install
third party software.
As an example: we have connected an ESS to our S70 - ADSM Server using 4 FC
adapters. AIX correctly detects each harddisk 4 times. You can check this by
the serialnumber. Using Subsystem Device drivers (used to be Datapath
Optimizer) you can map each unique harddisk per adapter to one virual
device.
See the clipping:
(rs6sv057-root) /home/root> datapath query device 12
DEV#: 12 DEVICE NAME: vpath13 TYPE: 2105F20 SERIAL: 50716694
=================================================================
Path# Adapter/Hard Disk State Mode Select Errors
0 fscsi0/hdisk15 OPEN NORMAL 1389355 0
1 fscsi2/hdisk31 OPEN NORMAL 1385889 0
2 fscsi3/hdisk62 OPEN NORMAL 1385217 0
3 fscsi4/hdisk47 OPEN NORMAL 1368531 0
You can see by the serial that all 4 harddisks are identical. The load to
the selected disks will be equally distibuted over al 4 paths. If one to
three paths fail, the remaining paths will continue to work without
disturbance. After reconnecting the failed paths, all load will
automatically be devided over the available paths.
This is what you would need to look for to connect your drives. What does
IBM say?
Good luck.
BTW: I woul'd imagine that your drive itself is most likely to fail, not
your connection. I think the cost will not weigh up against the gain.
Ilja Coolen.
-----Oorspronkelijk bericht-----
Van: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED]]Namens
Schönacher, Uwe
Verzonden: donderdag 3 mei 2001 12:00
Aan: [EMAIL PROTECTED]
Onderwerp: 3590 question
For all you AIX guru's out there,
I need an additional information on the definition of 3590 FC tape drives to
AIX.
We want to use both FC ports of the 3590 drives (connected via a FC
fabric)in parallel for automatic path fail over. Is this supported by AIX
and how could this be implemented in AIX. At the moment I see for the same
drive two definitions in AIX. They are both available but they doesn't work
in TSM (drives are first polled by TSM and set to unavailable later on).
Do you have a recommendation for defining both pathes to AIX in parallel for
dynamic path fail over?
Thank you in advance
Uwe
-----Original Message-----
From: Steve Harris [mailto:[EMAIL PROTECTED]]
Sent: 02 May 2001 04:54
To: [EMAIL PROTECTED]
Subject: Quick 3590 question
Can anyone tell me how many fibre ports there are on a 3590 with the fibre
attachment?
Thanks
Steve Harris
AIX and ADSM Admin
Queensland Health, Brisbane Australia
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