Discussion:
SAN switch for TAPE drive
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Peter
2018-08-10 06:46:21 UTC
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Hi

Apology for the dummy query

Is it really required for tape drives ficons have to go via San switch ? Or
it can be connected directly ? Any particular reason if it has to be via
SAN switch ?

Regards
Peter

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Vernooij, Kees - KLM , ITOPT1
2018-08-10 07:00:03 UTC
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No, it is a good question.
SAN switches are needed (or more efficient in connections) with more complex configurations. Since most configurations are that complex that SAN switches are useful, one only talks about these configurations.
So the simple configurations where you connect one device to one CPC (and don't need a SAN switch) are never mentioned, but still are valid.

Kees.
-----Original Message-----
Behalf Of Peter
Sent: 10 August, 2018 8:46
Subject: SAN switch for TAPE drive
Hi
Apology for the dummy query
Is it really required for tape drives ficons have to go via San switch ? Or
it can be connected directly ? Any particular reason if it has to be via
SAN switch ?
Regards
Peter
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Timothy Sipples
2018-08-13 08:00:02 UTC
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Very rarely a storage vendor might require attachment of their storage
device via a particular vendor-supported SAN switch in order to end up with
a vendor-supported configuration. Even in those rare, exceptional cases
it's not because the technology prohibits direct attachment. Sometimes a
tape controller is required, with or without a SAN switch in the picture.

Surely the tape drive vendor would know how their tape drive can be
attached, right?

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Timothy Sipples
IT Architect Executive, Industry Solutions, IBM Z & LinuxONE
E-Mail: ***@sg.ibm.com

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R.S.
2018-08-14 11:59:59 UTC
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Post by Peter
Hi
Apology for the dummy query
Is it really required for tape drives ficons have to go via San switch ? Or
it can be connected directly ? Any particular reason if it has to be via
SAN switch ?
It depends.
For TS3500 with TS1140 you will have SAN switch inside and it is
required equipment.
For StorageTek drives you don't need the switch, but you can use it.

In general you there is no switch required between CPC and CU.
--
Radoslaw Skorupka
Lodz, Poland




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