We have a partnership between a FS5200 running 8.6.0.5 with a thin pool with FCM drives (primary) and a FS5045 running 8.7.0.2 with a DRP pool (DR). On this partnership we have multiple remote copy relationships which are running fine. I've enabled policy-based replication for this partnership and I want to switch from RC to PBR. However, it seems that PBR is not working for FS5045 with a DRP pool . On FS5045 I have a warning on the PBR tab : "the system supports policy-based replication functionality on if data reduction pools are not in use". Also , when I try to create a Replication policy, I'm getting an internal error.

   I couldn't anything about this restriction in your official docs.

  Do you know more about this ? Is it a software restriction which can be removed in the next sw releases or it's a hardware restriction for FS5045 ?

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Adrian Nicolae
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Hi Adrian, 

the best piece of information I found concerning an existing limitation of using PBR in combination with DRP on a FlashSystem 5045 is Evelyn's post from last year in this community thread:

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Best regards, 

Christian Schroeder
IBM Storage Virtualize Support with Passion

Original Message:
Sent: Wed January 22, 2025 01:43 AM
From: Adrian Nicolae
Subject: PBR on FS5045 with a DRP pool

 We have a partnership between a FS5200 running 8.6.0.5 with a thin pool with FCM drives (primary) and a FS5045 running 8.7.0.2 with a DRP pool (DR). On this partnership we have multiple remote copy relationships which are running fine. I've enabled policy-based replication for this partnership and I want to switch from RC to PBR. However, it seems that PBR is not working for FS5045 with a DRP pool . On FS5045 I have a warning on the PBR tab : "the system supports policy-based replication functionality on if data reduction pools are not in use". Also , when I try to create a Replication policy, I'm getting an internal error.

   I couldn't anything about this restriction in your official docs.

  Do you know more about this ? Is it a software restriction which can be removed in the next sw releases or it's a hardware restriction for FS5045 ?

------------------------------
Adrian Nicolae
------------------------------

 We have a partnership between a FS5200 running 8.6.0.5 with a thin pool with FCM drives (primary) and a FS5045 running 8.7.0.2 with a DRP pool (DR). On this partnership we have multiple remote copy relationships which are running fine. I've enabled policy-based replication for this partnership and I want to switch from RC to PBR. However, it seems that PBR is not working for FS5045 with a DRP pool . On FS5045 I have a warning on the PBR tab : "the system supports policy-based replication functionality on if data reduction pools are not in use". Also , when I try to create a Replication policy, I'm getting an internal error.

   I couldn't anything about this restriction in your official docs.

  Do you know more about this ? Is it a software restriction which can be removed in the next sw releases or it's a hardware restriction for FS5045 ?

Christian has already provided the excellent documentation link for this question - WRT to the "is this a restriction that will be removed"?  The answer is no, this is not a temporary restriction.  The 5045 does not have enough system resources to support both Replication AND Data Reduction.  We can do this on the 5200 and the 5300 because it has more hardware offloads (an intel QAT for DRP) and more system memory to use for these features.

 We have a partnership between a FS5200 running 8.6.0.5 with a thin pool with FCM drives (primary) and a FS5045 running 8.7.0.2 with a DRP pool (DR). On this partnership we have multiple remote copy relationships which are running fine. I've enabled policy-based replication for this partnership and I want to switch from RC to PBR. However, it seems that PBR is not working for FS5045 with a DRP pool . On FS5045 I have a warning on the PBR tab : "the system supports policy-based replication functionality on if data reduction pools are not in use". Also , when I try to create a Replication policy, I'm getting an internal error.

   I couldn't anything about this restriction in your official docs.

  Do you know more about this ? Is it a software restriction which can be removed in the next sw releases or it's a hardware restriction for FS5045 ?