Table 11 Troubleshooting General Problems (continued)
Problem
Library Performance
Solution
• Check the SCSI IDs of all devices on the host busses | |
after connecting to the library. | to ensure there are no conflicts. |
| • Check that the application software does not require |
| SCSI IDs to be in a certain order. |
| • Contact your authorized service provider. |
|
|
The library is not efficiently backing up | • Check the network bandwidth from the target to the |
data. | host computer. |
| • Check that the library’s drives are on their own SCSI |
| bus, and not |
| hard drive, or other high bandwidth device. |
| • Check that the server and file system have the |
| processing power and memory needed to stream the |
| tape drive. |
| • Ensure that other applications are not taking up |
| bandwidth from the backup server or target |
| workstations. |
| • Ensure the server has a fast enough file system (i.e. |
| RAID). |
| • Ensure that the drive is clean. |
| • Try a new tape. A marginal tape can cause |
| performance problems due to bad spots on the tape, |
| requiring retries. |
| • Ensure that the application software is using |
| |
| throughput, and has not defaulted to a smaller |
| record size. (64K should be sufficient.) |
| • Ensure that the data is being compressed, however |
| do not turn on both software and hardware |
| compression. (In most cases, hardware compression |
| should be enabled.) |
| • Check the size of the files. Backing up several small |
| files can impact performance. |
|
|
Using Diagnostic Support Tools
This section describes diagnostic tools available to help troubleshoot and maintain your tape library.
