HP NetServer AA 6200 Backup/Recovery Guide for HP AA Solutions - Page 2

and run on the CE. Backup software backs up the CE NOS disk and the data disks in the same manner as in a standard (standalone) system. Each HP DLT 40r is used to backup the IOP NOS disk and any other IOP local disks. The tape drives, whether owned by IOP or CE, on each IOP can be controlled by the same SCSI HBA. In the current HP supported configurations, the built-in SCSI channels in an IOP are used for disk storage. This means that an additional SCSI HBA must be installed on each IOP for the tape drives. The figure shows two DLT80r and two DLT40r drives. This is the recommended configuration for assured availability and for load balancing purposes. It is possible to use a single DLT drive attached to one IOP, but each of the IOPs must still add an additional separate SCSI card. Note: "Autoloader" tape devices for local backup are not supported at this time. Support of these devices will be available in the future. CE boot disk IOP boot disk data disks CE SSDL IL IOP CE SSDL IOP DLT or DAT DLT or DAT CE boot disk IOP boot disk data disks CE Public LAN IOP LAN CE Public LAN IOP LAN Figure 2: Semi-Local backup configuration The second topology is a "semi-local backup configuration" (See figure 2). This configuration is similar to pure-local backup except that there is no local backup tape device for the IOPs. The NOS disks of the IOPs can be backed up via the Marathon virtual network between CE and each IOP but preferably should be done using an external network connections (e.g. each IOP has there own dedicated network connection to CE public LAN). The two tape drives in the figure are shown as attached to the IOPs and redirected to the CE through the Marathon Configuration Utility. This configuration allows balancing of load and certain performance gain in some cases. It is possible for both to be attached to just one of the IOP's. In fact, it is possible to have just a single tape drive. Again, since both built-in SCSI channels in the IOPs are used in the standard configurations, an additional SCSI HBA must be added to each of the IOP's for the tape device and to maintain the hardware redundancy configuration. 12/08/99 Hewlett-Packard Co. 2