Virtual TapeServer 6.04.03 Operations and Administration Guide

128 | Troubleshooting
• Are all of the cables secured tightly?
• Are any pins bent on any of the cables?
• Are all of the PCI cards seated properly? Is the plastic clip secured for each?
• Are messages present in the Power On Self Test (POST)?
If necessary, reseat the PCI cards. Halt VTS from the web interface, power down the server,
unplug the power cord, and then remove cables and reseat the PCI cards.
Hard drives
Verify the following:
• Are the hard drives seated properly?
• What is the color of the drive LED?
A green LED indicates normal operation; amber indicates failure. You can also remove all
hard drives and reseat them individually. Be sure to properly shut down VTS before
performing this operation.
SCSI controllers
You can rescan all SCSI controllers to list devices. Be sure to stop the tape drives in SCF on
the host server before initiating the scan. Run these commands (as root) to rescan the SCSI
controllers:
cd /usr/local/tape/bin
./rescan-scsi-bus.sh -l -c -r -w
Output is listed on screen and in the /usr/local/tape/log/rescan.txt file. The VTS
application must be restarted when a new physical tape device is found and must be used. If
the new devices were not detected, you can unplug the Fibre Channel connection to the VTS
server for two minutes or reboot the system.
File system
Verify the following:
• Has anything changed?
• Is performance slow?
• Is GFS running on the system?
• Is the problem occurring for a particular vault or all vaults? Is the problematic vault on
internal or external disk storage?
• What is the result of the last vault check on the external storage?
You can check for FSCK messages in the system log and the result of the last vault check. If
GFS is running, check connectivity between the systems by pinging the systems from the
command line of the operating system.
To diagnose file system problems, the following commands are useful:
df Shows disk utilization
top Shows CPU utilization, swap space, zombie processes, and so on
top -b -n 10 > output.txt
Runs top in batchmode