AMCC 720-0138-00 manual Incomplete unit detected, Initialize completed, Unclean shutdown detected

Chapter 9. Troubleshooting

0006 Incomplete unit detected

At power-on initialization time, or during a rescan, the 3ware RAID controller performs a “rollcall” of all drives attached to the card. After detection of the drives, the 3ware RAID controller then uses an internal algorithm to logically connect drives that belong to the same unit. If after rollcall a member of a unit is not found, the INCOMPLETE UNIT message is sent. Examples of incomplete units are as follows:

•3-drive or larger RAID 5 unit with two or more drives missing.

•4-drive RAID 10 unit with three drives missing.

Replacing the missing or dead drive and initiating a rebuild will change the state of the unit from an incomplete unit to OK. No rebuild is required if you replace the missing drive before loading the driver.

0007 Initialize completed

The 3ware RAID controller has completed the “synching” background initialization sequence of RAID levels 1, 10, or 5. For RAID 5, the data on the unit is read and the resultant parity is written to the parity area on the unit. For RAID 1 and 10, one half of the mirror is copied to the other half (mirrors are synchronized).

For information on the differences between foreground and background initialization, see “About Initialization” on page 69

0008 Unclean shutdown detected

The 3ware RAID controller has the ability to detect if the system has been shutdown via the standard shutdown mechanism of the operating system (clean shutdown). If the system loses power or is reset without going through the normal shutdown procedure, it is possible that the data on a redundant unit may be out of synchronization. The unclean shutdown detection will detect this case and force the unit to enter the verify state.

For more information on the verify state, see “About Verification” on page 70

To prevent unclean shutdowns, always go through the normal shutdown procedure. It is also recommended to use an uninterruptible power supply (UPS) to prevent unclean shutdowns due to sudden power loss.

0009 Drive timeout detected

The 3ware RAID controller has a sophisticated recovery mechanism to handle various types of failures of a disk drive. One such possible failure of a disk drive is a failure of a command that is pending from the 3ware RAID controller to complete within a reasonable amount of time. If the 3ware RAID

118 3ware Serial ATA RAID Controller User Guide for the Power Mac G5