Hi everyone

I am faced with a puzzle:

We have a hyperswap cluster (2xFS9500) that serves disks to our many hosts.

I also have a couple SVC nodes (4xSV2) that I am triying to use as a "sandbox" system. Right now they are configured as a streched cluster, but without any disks attached to them. I then zoned the SVC nodes to our 2 FS9500 enclosures and configured them as hosts/hostcluster. I created 2 sets of single sites volumes and provisioned them to the SVC nodes.

But when I refreshed the mdisks on the SVC cluster no additional (there is a quorum disk already) external mdisks were found. I then had a look at the fibrechannel connectivity on the SVC nodes and I saw that the FS9500 were visible (and the SVC nodes were also logged in on the hyperswap cluster).

But instead of showing the FS9500 WWNs as "storage system" (like the quorum disk system) it showed tham as "node" (as if I could link them together).

What am I doing wrong, did I misconfigure something?

Thanks and cheers

Peter

------------------------------
Peter Wyder
Senior DevOps Engineer Storage
Zürcher Kantonalbank
------------------------------

Hello Peter,

Are you sure that an FS9x00 cluster with 2 IOgroups behind an SVC is supported?
Disks from the FS9x00 backend come from 2 IOgroups and are offered to an SVC Cluster with 2 IOgroups.
In the past we first had to unbundle an FS7x00 cluster after which we could map it to an SVC cluster again.

Statement in Redbook Performance and Best Practices Guide for IBM Storage FlashSystem and IBM SAN Volume Controller:

It is recommended that you add each controller enclosure (I/O group) of an IBM FlashSystem back-end as its own controller, that is, do not
cluster IBM FlashSystem when it acts as an external storage controller behind another IBM Storage Virtualize product, such as SVC.

But maybe IBM support can clarify this.

Greets.

Hi everyone

I am faced with a puzzle:

We have a hyperswap cluster (2xFS9500) that serves disks to our many hosts.

I also have a couple SVC nodes (4xSV2) that I am triying to use as a "sandbox" system. Right now they are configured as a streched cluster, but without any disks attached to them. I then zoned the SVC nodes to our 2 FS9500 enclosures and configured them as hosts/hostcluster. I created 2 sets of single sites volumes and provisioned them to the SVC nodes.

But when I refreshed the mdisks on the SVC cluster no additional (there is a quorum disk already) external mdisks were found. I then had a look at the fibrechannel connectivity on the SVC nodes and I saw that the FS9500 were visible (and the SVC nodes were also logged in on the hyperswap cluster).

But instead of showing the FS9500 WWNs as "storage system" (like the quorum disk system) it showed tham as "node" (as if I could link them together).

What am I doing wrong, did I misconfigure something?

Thanks and cheers

Peter

------------------------------
Peter Wyder
Senior DevOps Engineer Storage
Zürcher Kantonalbank
------------------------------

Hi T

To be honest I dodn't know where to look if that was even supported. My thoughts were that the SVC nodes should basically work as Linux client hosts regarding the hyperswap cluster. Reading the excerpt you cited it seems to "only" be a recommendation to not cluster the flashsystems and not a "it just doesn't work" statement. But maybe I'm wrong here.

Cheers

Peter

Hello Peter,

Are you sure that an FS9x00 cluster with 2 IOgroups behind an SVC is supported?
Disks from the FS9x00 backend come from 2 IOgroups and are offered to an SVC Cluster with 2 IOgroups.
In the past we first had to unbundle an FS7x00 cluster after which we could map it to an SVC cluster again.

Statement in Redbook Performance and Best Practices Guide for IBM Storage FlashSystem and IBM SAN Volume Controller:

It is recommended that you add each controller enclosure (I/O group) of an IBM FlashSystem back-end as its own controller, that is, do not
cluster IBM FlashSystem when it acts as an external storage controller behind another IBM Storage Virtualize product, such as SVC.

But maybe IBM support can clarify this.

Greets.

Hi everyone

I am faced with a puzzle:

We have a hyperswap cluster (2xFS9500) that serves disks to our many hosts.

I also have a couple SVC nodes (4xSV2) that I am triying to use as a "sandbox" system. Right now they are configured as a streched cluster, but without any disks attached to them. I then zoned the SVC nodes to our 2 FS9500 enclosures and configured them as hosts/hostcluster. I created 2 sets of single sites volumes and provisioned them to the SVC nodes.

But when I refreshed the mdisks on the SVC cluster no additional (there is a quorum disk already) external mdisks were found. I then had a look at the fibrechannel connectivity on the SVC nodes and I saw that the FS9500 were visible (and the SVC nodes were also logged in on the hyperswap cluster).

But instead of showing the FS9500 WWNs as "storage system" (like the quorum disk system) it showed tham as "node" (as if I could link them together).

What am I doing wrong, did I misconfigure something?

Thanks and cheers

Peter

------------------------------
Peter Wyder
Senior DevOps Engineer Storage
Zürcher Kantonalbank
------------------------------

Hi everyone

I am faced with a puzzle:

We have a hyperswap cluster (2xFS9500) that serves disks to our many hosts.

I also have a couple SVC nodes (4xSV2) that I am triying to use as a "sandbox" system. Right now they are configured as a streched cluster, but without any disks attached to them. I then zoned the SVC nodes to our 2 FS9500 enclosures and configured them as hosts/hostcluster. I created 2 sets of single sites volumes and provisioned them to the SVC nodes.

But when I refreshed the mdisks on the SVC cluster no additional (there is a quorum disk already) external mdisks were found. I then had a look at the fibrechannel connectivity on the SVC nodes and I saw that the FS9500 were visible (and the SVC nodes were also logged in on the hyperswap cluster).

But instead of showing the FS9500 WWNs as "storage system" (like the quorum disk system) it showed tham as "node" (as if I could link them together).

What am I doing wrong, did I misconfigure something?

Thanks and cheers

Peter

------------------------------
Peter Wyder
Senior DevOps Engineer Storage
Zürcher Kantonalbank
------------------------------

Hi Peter,

Which npiv wwpn's used in your svc-to-9500 zones? As you already know there is 3 wwpn's on each port of 9500. One is for storage-to-storage connectivity, one is for scsi hosts and the last one is for nvme hosts. You can check this via lstargetportfc command on 9500 and check your zone uses the right npiv wwpn for svc connectivity. 

Hi everyone

I am faced with a puzzle:

We have a hyperswap cluster (2xFS9500) that serves disks to our many hosts.

I also have a couple SVC nodes (4xSV2) that I am triying to use as a "sandbox" system. Right now they are configured as a streched cluster, but without any disks attached to them. I then zoned the SVC nodes to our 2 FS9500 enclosures and configured them as hosts/hostcluster. I created 2 sets of single sites volumes and provisioned them to the SVC nodes.

But when I refreshed the mdisks on the SVC cluster no additional (there is a quorum disk already) external mdisks were found. I then had a look at the fibrechannel connectivity on the SVC nodes and I saw that the FS9500 were visible (and the SVC nodes were also logged in on the hyperswap cluster).

But instead of showing the FS9500 WWNs as "storage system" (like the quorum disk system) it showed tham as "node" (as if I could link them together).

What am I doing wrong, did I misconfigure something?

Thanks and cheers

Peter

------------------------------
Peter Wyder
Senior DevOps Engineer Storage
Zürcher Kantonalbank
------------------------------

Hi everyone

I am faced with a puzzle:

We have a hyperswap cluster (2xFS9500) that serves disks to our many hosts.

I also have a couple SVC nodes (4xSV2) that I am triying to use as a "sandbox" system. Right now they are configured as a streched cluster, but without any disks attached to them. I then zoned the SVC nodes to our 2 FS9500 enclosures and configured them as hosts/hostcluster. I created 2 sets of single sites volumes and provisioned them to the SVC nodes.

But when I refreshed the mdisks on the SVC cluster no additional (there is a quorum disk already) external mdisks were found. I then had a look at the fibrechannel connectivity on the SVC nodes and I saw that the FS9500 were visible (and the SVC nodes were also logged in on the hyperswap cluster).

But instead of showing the FS9500 WWNs as "storage system" (like the quorum disk system) it showed tham as "node" (as if I could link them together).

What am I doing wrong, did I misconfigure something?

Thanks and cheers

Peter

------------------------------
Peter Wyder
Senior DevOps Engineer Storage
Zürcher Kantonalbank
------------------------------

Hi everyone

I am faced with a puzzle:

We have a hyperswap cluster (2xFS9500) that serves disks to our many hosts.

I also have a couple SVC nodes (4xSV2) that I am triying to use as a "sandbox" system. Right now they are configured as a streched cluster, but without any disks attached to them. I then zoned the SVC nodes to our 2 FS9500 enclosures and configured them as hosts/hostcluster. I created 2 sets of single sites volumes and provisioned them to the SVC nodes.

But when I refreshed the mdisks on the SVC cluster no additional (there is a quorum disk already) external mdisks were found. I then had a look at the fibrechannel connectivity on the SVC nodes and I saw that the FS9500 were visible (and the SVC nodes were also logged in on the hyperswap cluster).

But instead of showing the FS9500 WWNs as "storage system" (like the quorum disk system) it showed tham as "node" (as if I could link them together).

What am I doing wrong, did I misconfigure something?

Thanks and cheers

Peter

------------------------------
Peter Wyder
Senior DevOps Engineer Storage
Zürcher Kantonalbank
------------------------------

Hi everyone

I am faced with a puzzle:

We have a hyperswap cluster (2xFS9500) that serves disks to our many hosts.

I also have a couple SVC nodes (4xSV2) that I am triying to use as a "sandbox" system. Right now they are configured as a streched cluster, but without any disks attached to them. I then zoned the SVC nodes to our 2 FS9500 enclosures and configured them as hosts/hostcluster. I created 2 sets of single sites volumes and provisioned them to the SVC nodes.

But when I refreshed the mdisks on the SVC cluster no additional (there is a quorum disk already) external mdisks were found. I then had a look at the fibrechannel connectivity on the SVC nodes and I saw that the FS9500 were visible (and the SVC nodes were also logged in on the hyperswap cluster).

But instead of showing the FS9500 WWNs as "storage system" (like the quorum disk system) it showed tham as "node" (as if I could link them together).

What am I doing wrong, did I misconfigure something?

Thanks and cheers

Peter

------------------------------
Peter Wyder
Senior DevOps Engineer Storage
Zürcher Kantonalbank
------------------------------

Hi,

1. FlashSystem hyperswap volumes can not be mapped to svc, multiple io group and so in, as many others have said
2. svc must be mapped to the scsi WWPNs in fs9500, otherwise it won't work. For fs9500 the svc is just another Linux host 

Hi everyone

I am faced with a puzzle:

We have a hyperswap cluster (2xFS9500) that serves disks to our many hosts.

I also have a couple SVC nodes (4xSV2) that I am triying to use as a "sandbox" system. Right now they are configured as a streched cluster, but without any disks attached to them. I then zoned the SVC nodes to our 2 FS9500 enclosures and configured them as hosts/hostcluster. I created 2 sets of single sites volumes and provisioned them to the SVC nodes.

But when I refreshed the mdisks on the SVC cluster no additional (there is a quorum disk already) external mdisks were found. I then had a look at the fibrechannel connectivity on the SVC nodes and I saw that the FS9500 were visible (and the SVC nodes were also logged in on the hyperswap cluster).

But instead of showing the FS9500 WWNs as "storage system" (like the quorum disk system) it showed tham as "node" (as if I could link them together).

What am I doing wrong, did I misconfigure something?

Thanks and cheers

Peter

------------------------------
Peter Wyder
Senior DevOps Engineer Storage
Zürcher Kantonalbank
------------------------------