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Chapter 9. Troubleshooting
118 3ware Serial ATA RAID Controller User Guide for the Power Mac G5
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