Troubleshooting IBM DS6000 and DS8000 arrays

This section provides explanations and recommended actions, as well as log entries that may help identify the problem.

Note the following important items:

Before you start a backup, the snapshot device (clone) must be visible (unmasked) to the NetBackup client or alternate client.
For backup and Instant Recovery rollback restore: you must supply logon credentials that allow the NetBackup client to access the IBM array. For NetBackup hosts not named in a policy (such as alternate clients), you must also configure NetBackup so that the host can access the credentials.
Backups may appear to succeed, but the bprd log on the server contains messages similar to the following:
```
09:02:17.999 [4292.3092] <2> is_disk_client_configured:  
db_cred_allowed(host1.enterprise.com, 1) failed: 227
09:02:17.999 [4292.3092] <2> read_text_file:
is_disk_client_configured(host1.enterprise.com) failed: 227
09:02:17.999 [4292.3092] <2> process_request: read_text_file
failed - status = client is not validated to use the server
(131)
```
Until credential access is enabled, a backup or a point-in-time rollback fails with NetBackup status 5.
See Configuring NetBackup to access the IBM DS6000 or DS8000 array.
See Configuring array access for NetBackup hosts not named in a policy.

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