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NetWare Data Recovery Case Studies

  1. Error Writing to the FAT Table
  2. New Volume Segment Lost
  3. Lost all partitions on disk drive
  4. Could not mount SYS volume
  5. NSS Volumes disappeared

Error Writing to the FAT Table:

Error messages would appear on the system console about errors writing to the FAT table. When attempting to remount the volume, VREPAIR would be executed. VREPAIR would report 48 errors each time.

These errors were caused by defective sectors within the NetWare partition. Portlock Storage Manager was used to scan and repair the NetWare partition. The command used was "Partition Commands" -> "Verify NetWare Partition." The option "HotFix Sector Errors" was enabled. Once the defective sectors were remapped, the volume VREPAIR was successful.

Total Cost: $295.00 to purchase Portlock Storage Manager
Total Time: 2 hours.

New Volume Segment Lost:

The customer needed more volume space, so he added another volume segment using free space on a second disk drive. The second disk drive promptly failed rendering the volume unmountable.

Portlock Storage Manager was used to replace the missing volume segment. Since the new segment had just been added to the volume, there was no data loss as there were no new files copied to the volume. The commands used were "Repair Commands" -> "Repair a volume with a missing volume segment." Once the replacement segment was created, the volume could be mounted.

Total Cost: $295.00 to purchase Portlock Storage Manager
Total Time: 10 minutes.

Lost all partitions on disk drive:

A new system administrator had just started work for his company. Using NWCONFIG, he inadvertently executed the command "Initialize disk" not realizing that this command would delete all partitions on the disk drive.

Portlock Storage Manager was used to recover the three deleted partitions (DOS, NetWare Traditional and NSS). The partitions were recovered using the following procedure:

  1. "Repair Commands" -> "DOS partition recovery commands" -> "Recover a DOS partition that has been deleted."
  2. "Repair Commands" -> "NetWare Tradition partition and volume recovery commands" -> "Recover a NetWare 386 partition that has been deleted."
  3. "Repair Commands" -> "NSS partition and volume recovery commands" -> "Recover an NSS Type 2 partition that has been deleted."

Total Cost: $295.00 to purchase Portlock Storage Manager
Total Time: 1 hour.

Could not mount SYS volume:

The SYS volume would not mount. Errors were being reported for the disk drive that held the SYS volume.

The disk drive holding the SYS volume was failing. Portlock Storage Manager was used to copy the SYS volume to another disk drive. For each of the disk areas that were defective, Portlock Storage Manager would do a multi-pass read recovering as much sector data as possible. After the volume was copied the original disk drive was removed, Portlock Storage Manager was used to rename the copied SYS volume back to the name SYS.

Total Cost: $295.00 to purchase Portlock Storage Manager
Total Time: 1 hour.

NSS Volume Disappeared:

The server held 10 NSS volumes in one Storage Group. Suddenly the volumes disappeared. NetWare complained that one or more volume segments could not be found when manually trying to mount any of the volumes. Each of the 10 volumes were 40 gigabytes in size.

The NSS partition had become corrupted causing NetWare to not see the NSS volumes located in the Storage Group. Portlock Storage Manager was used to copy each of the NSS volumes to a new Storage Group. The key to the solution was that Portlock Storage Manager could see the volumes even though the partition was corrupted. After the NSS volumes were copied to new storage, the original Storage Group partition was deleted, and the volumes were renamed back to their original names.

Total Cost: $295.00 to purchase Portlock Storage Manager
Total Time: 20 hours.

For more information about Portlock Storage Manager Data Recovery features.

For more information about Portlock Storage Manager

       
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Last modified: Tuesday March 14, 2006.