Dear Michael,

Do you use separate adapters for tape i/o and dsik i/o and tape i/o ?

If so you kan try to set your switch tape poorts in G mode.

This mode wil force your poort to initiate a Fabric mode login of your
drives instead of a Loop mode.

Earlier Firmware levels of LTO2 drives still log in as a Loop devices
instead of a fabric device...

Cheers,

Koen.

From: Schmitz Garnebode <Schmitz.Garnebode AT SWEST DOT DE>
Reply-To: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Planning new SAN
Date: Thu, 22 Jan 2004 11:35:59 +0100

Hi list,

i have a question about SAN design.
We plan to connect a 3584 with lto2 units in a disk-san environment . There
are
enough ports
to connect all units.

But a cutomers describe a problem with tapeunits in one san (disk+tape).
When he
create  new zonings
or do changes in the san a "remote state change notification" for all
components
is send.
When a backup is running on TSM the backup failes. The tapedrive becomes
this
"rscn" and
do a "fabric_logoff" "fabric_logon" (not the right description) to update
the
new san-configuration.

Have anybody seen or listen this problem ? Is that a real problem for mixed
san
components (disk+tape) for TSM?

I have told ibm support for a answer but there are no recommandations to
split a
san or create two fabrics one for
disk and one for tape devices.

Any idea

kind regards


Michael Garnebode
Diplom-Informatiker
Systemberater

Schmitz RZ Consult
Gesellschaft f|r DV-Beratung und Projektmanagement mbH
Im Blumersfeld 22
50259 Pulheim
Tel.: +49 (0) 2238/922266
Fax:  +49 (0) 2238/922267
EMail: garnebode AT schmitz-rz-consult DOT de

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