Seagate ST39175LW Anleitung zur Fehlerbehebung PDF herunterladen (Seite 129)

Chapter 7, Extended Frozen Image Services (Array Integration Option) 115

Best Practices

The recommendations in this section apply primarily to the use of the Extended Frozen

Image Services and Volume Manager, except where noted.

NetBackup Access to Arrays

In connection with the information listed under “Access to Disk Arrays” on page 96, note

the following recommendation:

◆ The NetBackup media server only needs read access to the secondary disks in the

array; it does not need access to the primary disks.

Resynchronizing Disks At End of Backup

Resynchronizing very large mirror disks can take time. If disk-resynchronization

significantly delays completion of the backup, set the async-resync option to 1. This

allows the backup to complete without waiting for the mirror disks to be resynchronized.

The disks are resynchronized after the backup completes. Refer to step 11 on page 78 for

more information on this option.

Volume Manager Disk Groups

◆ When creating a VxVM disk group, it is best to create a group that corresponds to the

primary disks that were grouped as described under “Configuring Primary and

Secondary Disks” on page 98. If you create an array disk group with two primary

disks, then a VxVM disk group should be created with the same primaries. In other

words, the VxVM disk group configuration should follow the array disk group

configuration for the primaries.

Volume Manager with Dynamic Multipathing (DMP)

If you are using Volume Manager with DMP enabled, and there are multiple paths to the

same disk array (for instance, one fibre channel connection and one SCSI), DMP will

rename the array’s disks with DMP encapsulated names.

Backups Concurrently Accessing Same Disk (no VxVM)

A conflict occurs if two or more backups using Extended Frozen Image Services attempt

to access a disk at the same time.

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Seagate ST39175LW Anleitung zur Fehlerbehebung Seite 129