System and method of network diagnosis

Abstract

Embodiments provide systems and methods for diagnosing a network and identifying problems in a network which reduce the data transfer rate of data through the network. One embodiment of a method for network diagnosis may include infusing data into a network upstream and downstream of a portion of the network relative to a library drive, querying the drive at intervals over time for drive data to determine the data transfer rate at the drive and comparing the data transfer rate of the data infused upstream of the device or network portion with the data transfer rate of the data infused downstream of the device or network portion to determine throughput. By comparing the data transfer rate of data infused upstream and downstream of a network device or network portion, problem devices in a network may be identified.

What is claimed is: 
     
         1 . A computer program product comprising one or more non-transitory computer readable media embodying computer executable instructions implementing a method for network diagnosis, comprising:
 sending a command to an infusion device to initiate infusing of control data by the infusion device;   periodically sending commands to a drive of a media library over the network while the control data is being transferred at the drive to collect data generated by the drive;   receiving responses to the commands from the drive, the responses specifying amounts of data; and   determining a measure of network performance for a portion of the network between the infusion device and drive based on the responses from the drive.   
     
     
         2 . The computer program product of  claim 1 , wherein the measure of network performance comprises an actual data transfer rate at the drive. 
     
     
         3 . The computer program product of  claim 2 , the method further comprising comparing the actual data transfer rate to a desired data transfer rate. 
     
     
         4 . The computer program product of  claim 2 , wherein the actual data transfer rate comprises a rate at which drive received the control data. 
     
     
         5 . The computer program product of  claim 2 , wherein the actual data transfer rate comprises a rate at which the drive wrote the control data. 
     
     
         6 . The computer program product of  claim 1 , wherein the commands sent to the drive comprise SCSI commands.