>>>> Also, in this thread no body mentioned: Externally Virtualized Storage feature, which is available in FS9500. <<<<
This sounds like IBM SAN Volume Controller product to me. From my faint memory, this similar capability was incorporated into StorWize family a long time ago. As far as IBM i is concerned, I never knew of any IBM i customers having a need for it.
Original Message:
Sent: Tue April 16, 2024 10:02 AM
From: Sudhir BISHT
Subject: Is FlashSystem's migration function available when only storage is being migrated?
Dear Satid. Thanks for the reply. First of all, what an excellent , extensive document you have created, with screenshots and all the necessary details. Kudos.
Yes, that is right. A9000R does has remote mirroring, just another terminology, same concept. Need to check if that can be setup as Primary:A9000R, Target:FS9500 We would also prefer that Array to Array Migration with Replication. (We do that a lot for EMC: Just sync and then split at cutover). For the 2nd part you mentioned, that also we did here a lot initially when A9000R was installed. It is DM Tool in-built in A9000/A9000R, which can be used to pull data from any 3rd Party Storage Array. Works very very well. They should have introduced something like that in new FlashSystem FS9X00 Series also.
Also, in this thread no body mentioned: Externally Virtualized Storage feature, which is available in FS9500. Was it bcoz that needs purchasing extra licenses on capacity basis. With this feature, any external storage(non-IBM as well) has its capacity becomes part of FS9500, and then may be one can use some local FS9500 commands (I need to check those commands, for A9000R, that is volcopy), and migrate the data online to actual volumes of the FS9500. So, this can be used for migrations.
(We used similar External Virtualization in our Hitachi Storage to pull data from old EMC Storages. Concept works very good.)
Finally, I am also reading that: In FS9500, with non-disruptive system migration (remote copy relationship), storage administrators can migrate volumes from one IBM Storage Virtualize system to another without any application downtime. But need to see if A9000R can be part of it or not, as pre-requisite says: Ensure that both systems are running 8.4.2 or later. A9000R doesn't have that. It has Code 12.3.2.e etc. So, may not work.
A9000R was EoL/EoS in Oct-2023, but our A9000R is still under support contract till 2025, so we still have time to explore the strategies for migrations.
Thanks
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Bhuppi
Original Message:
Sent: Mon April 15, 2024 09:23 PM
From: Satid S
Subject: Is FlashSystem's migration function available when only storage is being migrated?
Dear Sudhir
>>>> Now, I was checking in the A9000R manual, and I don't see 'Metro Mirror' in it. <<<<
I did a Google search with 'ibm a9000r' and saw a link to its product guide here https://www.redbooks.ibm.com/redpapers/pdfs/redp5475.pdf It turns out A9000R used the word "replication" (synch and asynch) instead of metro or global mirror. So, no worry here for you. I also found this statement in the book that can be useful for you (on page 4-5):
Data Migration
FlashSystem A9000R also can act as a host and gain access to volumes on a storage system. The system is configured as a proxy to respond to requests between the current hosts and the storage while migrating all data in the background.
........
For more information about replication and migration, see the IBM Redbooks publication, IBM FlashSystem A9000 and A9000R Business Continuity Solutions, REDP-5401.
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Satid S
Original Message:
Sent: Mon April 15, 2024 05:59 PM
From: Sudhir BISHT
Subject: Is FlashSystem's migration function available when only storage is being migrated?
Dear Steve. Thanks for the details on the Storage-Based Migration. We will also be soon replacing our A9000R with FS9500. Now, I was checking in the A9000R manual, and I don't see 'Metro Mirror' in it. So, will this Metro Mirror will be setup from new FS9500 side, and it will be kind of 'pulling' the data. I A9000R Business Continuity Functions list , I only see: Mirroring, HyperSwap, Multi-Site HA/DR. Please advise. Best.
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Bhuppi
Original Message:
Sent: Fri January 20, 2023 09:14 AM
From: Steve Pavlichek
Subject: Is FlashSystem's migration function available when only storage is being migrated?
If the A9000 and FS9500 are on the same SAN fabric:
Configure Metro Mirror replication of volumes from A9000 to FS9500 via FC replication.
Add zoning from HOST LPAR to FS9500
Once volumes are in sync
Power off LPAR
End Replication and enable target volumes
map FS9500 volumes to the HOST LPAR
IPL LPAR
This provides a shorter outage window than the load source migration plus has the benefit of if there is an issue the original volumes are still available on the A9000.
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Steve Pavlichek
Original Message:
Sent: Thu January 19, 2023 05:13 AM
From: ATSUSHI NAKATA
Subject: Is FlashSystem's migration function available when only storage is being migrated?
We are planning to replace only the storage with FlashSystem 9500 as the A9000 is out of maintenance.
According to Redbook, in this case, I think it is a full backup/full restore on a tape device or a LUN-to-LUN movement with the STRASPBAL command.
Is the FlashSystems migration function like the attached file available?
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ATSUSHI NAKATA
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