Accessing Magstars over Fibre Channel

Accessing Magstars over Fibre Channel

Post by jsherman.. » Fri, 05 May 2000 04:00:00



Hello AIXers,

We're having problems talking to two Magstar 3590 DLT tape
drives over Fibre Channel.  Our config is such:

RS6000 (SP node, AIX v4.3.2, Emulex lp8000 HBA)--fibre-->
Brocade Silkworm Fibre switch--fibre-->
Crossroads Fibre/SCSI bridge gateway--scsi-->
IBM Magstar 3590 DLT tape drives

We've finally been able to make the rmt0 and rmt1
tape devices in AIX with the mkdev command, but any
tapeutil, tctl, etc commands on those drives fail with
"connection timed out" immediately.

Is there anything on the AIX side we should do, or
does anyone have any suggestions or war stories regarding
the Emulex card, the Silkworm switch, the Crossroads
bridge, or the 3590 tapes?  Any idea where the
break in communication is happening?

Any help is very appreciated, thanks.  -Jay

Sent via Deja.com http://www.deja.com/
Before you buy.

 
 
 

Accessing Magstars over Fibre Channel

Post by Joshua S. Bass » Fri, 05 May 2000 04:00:00


First I would have to ask if you verified this is a valid
config?  I thought you had to the IBM SAN Data
Gateway (I think OEMed from Vixel) to get those drives
to talk FC.

Have you installed all the correct device drivers?

--
Joshua S. Bassi
Senior Technical Consultant
IBM Certified Specialist - AIX Support
Tivoli Certified Consultant - TSM 3.7
Symatrix Technology, Inc.
jbassi at gloryworks dot com


Quote:> Hello AIXers,

> We're having problems talking to two Magstar 3590 DLT tape
> drives over Fibre Channel.  Our config is such:

> RS6000 (SP node, AIX v4.3.2, Emulex lp8000 HBA)--fibre-->
> Brocade Silkworm Fibre switch--fibre-->
> Crossroads Fibre/SCSI bridge gateway--scsi-->
> IBM Magstar 3590 DLT tape drives

> We've finally been able to make the rmt0 and rmt1
> tape devices in AIX with the mkdev command, but any
> tapeutil, tctl, etc commands on those drives fail with
> "connection timed out" immediately.

> Is there anything on the AIX side we should do, or
> does anyone have any suggestions or war stories regarding
> the Emulex card, the Silkworm switch, the Crossroads
> bridge, or the 3590 tapes?  Any idea where the
> break in communication is happening?

> Any help is very appreciated, thanks.  -Jay

> Sent via Deja.com http://www.deja.com/
> Before you buy.


 
 
 

Accessing Magstars over Fibre Channel

Post by vddev.. » Fri, 05 May 2000 04:00:00



> Hello AIXers,

> We're having problems talking to two Magstar 3590 DLT tape
> drives over Fibre Channel.  Our config is such:

> RS6000 (SP node, AIX v4.3.2, Emulex lp8000 HBA)--fibre-->
> Brocade Silkworm Fibre switch--fibre-->
> Crossroads Fibre/SCSI bridge gateway--scsi-->
> IBM Magstar 3590 DLT tape drives

> We've finally been able to make the rmt0 and rmt1
> tape devices in AIX with the mkdev command, but any
> tapeutil, tctl, etc commands on those drives fail with
> "connection timed out" immediately.

> Is there anything on the AIX side we should do, or
> does anyone have any suggestions or war stories regarding
> the Emulex card, the Silkworm switch, the Crossroads
> bridge, or the 3590 tapes?  Any idea where the
> break in communication is happening?

> Any help is very appreciated, thanks.  -Jay

> Sent via Deja.com http://www.deja.com/
> Before you buy.

Word is that if you're going to use Fibre Channel you want to be at
4.3.3 because the 4.3.2 FC drivers aren't that
reliable...

C. DeVille

 
 
 

1. Fibre Channel Storage - Access by multiple hosts

I have "inherited" a project which the original integrators have dumped with
not much info available.  Basically the system is as follows:

5 solaris (2.6) hosts are connected through a 100Mb ethernet switch and each
also has a Fibre Channel (FC) HBA connected through a FC switch.

Each host requires access to a FC storage system ( JBOD -10x36GB).  This
JBOD should have been ideally a 320GB RAID, or even a large stripe as the
users have to aquire a large analogue signal, convert to digital and dump to
storage before analyzing.

I can use disksuite to create the RAID/stripe (probably stripe until a
hardware FC RAID controller is purchased).  My main concern is that the
software stripe would have to be exported for use by the other users.  Does
this mean that the only way the other terminals can see the "big" disk is by
access across the ethernet and through the host running disksuite?, or will
the other hosts "see" the stripe on the FC side?

Ideally all data transfer would be across the FC.  If I can prove the system
to work I intend to get the finance deptartment to sanction an external RAID
controller for attaching to the JBOD and hence presenting a large drive on
the FC.

Apologies if I have made any glaring goofs on my interpretation of
Fibre-Channel, I was only introduced to it 48 hours ago!

Jim Watson

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