Chapter Review Questions

     
1:

You are attempting to ensure that the IO tree on all your HP-UX machines is the same from one server to another. All the servers currently have exactly the same hardware configuration and are all connected to the same number of shared devices. All the servers have recently been reinstalled with the most recent version of HP-UX. Explain how you can ensure that all the servers in your network continue to create device files following the same device file naming convention for every shared device. Give at least one example when the device file names could become out of sync.

2:

You have successfully remapped your IO tree to reflect the IO tree on other servers in your network. You can identify all the new device files and can identify individual devices (uin commands such as ioscan ) based on the new IO tree numbering scheme. On restarting your system, none of your user applications can access any of the data on your LVM disks. The LVM disks hold filesystems and raw data. What steps in your plan have your forgotten to undertake and what should you do to rectify the situation? What changes will you need to make to the /etc/fstab file for the LVM hosted filesystems? Would these problems have manifested themselves if our disk were under the control of VxVM?

3:

Your SAN administrator has decided to perform a firmware upgrade on all of your Fibre Channel switches because they are rather old and have experienced intermittent problems that have been identified with the particular firmware revision used on the switches. The upgrade was entirely successfully, and the SAN is working as expected. Unfortunately, the main database application cannot access its data held on a disk array located within the SAN . The SAN administrator has checked the zoning of the SAN and all appears to be okay (they even changed the GBICs just in case). The disk array administrator has checked the LUN security on the disk array, and all appears okay. What could be causing the application to not be able to see the LUNs on the disk array? List two solutions to rectify the problem.

4:

Given the simplified diagram of a Switched Fabric SAN in Figure 4-3, work out the full hardware path and associated device files (/dev/*dsk/?) that represent the path taken by the red and blue lines to the LUN on the disk array.

Figure 4-3. Question 4: Name the device files for the LUN.
graphics/04fig03.jpg

Note : The ext_bus Instance number is applicable to first Virtual SCSI Bus on the particular interface card. Assume that the next available Instance number is 11 if required. The numbers in the black-lined boxes represent the port numbers on individual switches used for the relevant connections. The switches have firmware setting Core Switch PID Format set ON.

5:

You are about to replace an interface card using OLA /R commands instead of using SAM . You know the hardware path and the associated slot-id of the interface card in question. Why is it important that you know the name of the kernel driver associated with the interface card?



HP-UX CSE(c) Official Study Guide and Desk Reference
HP-UX CSE(c) Official Study Guide and Desk Reference
ISBN: N/A
EAN: N/A
Year: 2006
Pages: 434

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