Hello Furuya-san,
Thank you for your reply, that explanation is very helpfull.
My question is cleared.
Thank you again.
Best regards,
Toyokazu Kobayashi
----- Original Message -----
From: "Nobuhiko Furuya" <[email protected]>
Newsgroups: bit.listserv.ibm-main
To: <[email protected]>
Sent: Thursday, May 26, 2022 7:35 PM
Subject: Re: Tape drive sharing
Hi Kobayashi-san,
If your environment is not a sysplex configuration, you can't vary the
tape drives online from multiple MVSes at a time.
If you are using sysplex configuration, you can implement AutoSwitch.
AutoSwicth can be implemented with AutoSwitch parameter in IODF(not IOCP
but MVSCP) definition or VARY cuuu,AS,ON command.
If the tape drives are defined with AutoSwich attribute, you can vary
online them from multiple MVSes at a time.
Of course even in AutoSwitch, a tape drive can be used from only 1 MVS
physically at a time.
Best regards,
Nobuhiko Furuya(古谷信彦)
V-SOL Inc.
e-mail:[email protected]
On 2022/05/26 13:18, (K.K.Paradox)T.Kobayashi wrote:
Hello,
Can IBM 3590 tape drive be online at the same time with both LPARs?
If there is an LPAR that currently brought the *all drives* online,
another LPAR will issue an IEE791I.
IEE791I cuu VARY REJECTED - ASSIGNED TO ANOTHER SYSTEM
I understand that both LPARs cannot use tape drives at the same time.
I know there are products like CA-MIM to prevent this.
Please do not consider separating the some drives and assigning it to
both LPARs.
Shared DASD can be online at the same time on both LPARs.
Is it correct to recognize that the tape drives can also be online with
both LPARs at the same time?
If this is possible, could you please advise what settings are required?
Current IOCP setting is bellow:
CHPID PATH=(CSS(1),63),TYPE=FC,SHARED, X
PARTITION=((CSS(1), X
(PROD,TEST), X
(=))), X
PCHID=1EC
CHPID PATH=(CSS(1),BA),TYPE=FC,SHARED, X
PARTITION=((CSS(1), X
(PROD,TEST), X
(=))), X
PCHID=2D0
E3590A10 CNTLUNIT CUNUMBR=3590,PATH=((CSS(1),63,BA)),CUADD=0, X
UNIT=3590,UNITADD=((00,016))
EMIF0A10 IODEVICE CUNUMBR=3590,ADDRESS=(0A10,016),UNITADD=00, X
UNIT=3590,STADET=Y
Besy regards,
Toyokazu Kobayashi
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