AEN Messages
www.3ware.com
221
Possible causes of UDMA CRC errors are bad interface cables or cable
routing problems through electrically noisy environments (e.g., cables are too
close to the power supply).
022h Upgrade UDMA mode
During the self-test, if a drive is found to not be in the optimal UDMA mode,
the controller will upgrade its UDMA mode to be optimal.
023h Sector repair completed
The 3ware RAID controller supports a feature called dynamic sector repair to
allow the unit to recover from certain drive errors that would normally result
in a degraded array situation. For redundant arrays such as RAID 1, 10, 50,
and 5, the 3ware RAID controller essentially has two copies of the users data
available. If a read command to a sector on a disk drive results in an error, it
reverts to the redundant copy in order to satisfy the host’s request. At this
point, the 3ware RAID controller has a good copy of the requested data in its
cache memory. It will then use this data to force the failing drive to reallocate
the bad sector, which essentially repairs the sector. When a sector repair
occurs, the user is notified by this AEN.
The fact that a sector repair AEN has been sent to the user is an indication of
the presence of grown defects on a particular drive. While typical modern disk
drives are designed to allow several hundred grown defects, special attention
should be paid to any drive in an array that begins to indicate sector repair
messages. This may be an indication of a drive that is beginning to fail. The
user may wish to replace the drive, especially if the number of sector repair
errors exceeds 3 per month.
024h Sbuf memory test failed
The 3ware RAID controller, as part of its data integrity features, performs
diagnostics on its internal RAM devices. Once a day, a non-destructive test is
performed on the cache memory. Failure of the test indicates a failure of a
hardware component on the 3ware RAID controller. This AEN is sent to
notify the user of the problem. If the controller is still under warranty, contact
3ware Technical Support for a replacement controller.
025h Cache flush failed; some data lost
To improve performance, this 3ware RAID controller features caching layer
firmware. For write commands this means that it acknowledges it has
completed a write operation before the data is committed to disk. If the 3ware
RAID controller can not commit the data to the media after it has
acknowledged to the host, this AEN is posted to the user.
Summary of Contents for 9550SXU-16ML - Sata Rohs
Page 10: ...viii 3ware 9550SX Serial ATA RAID Controller User Guide...
Page 64: ...Chapter 4 Driver Installation 54 3ware 9550SX Serial ATA RAID Controller User Guide...
Page 74: ...Chapter 5 3ware BIOS Manager 2 3BM 2 64 3ware 9550SX Serial ATA RAID Controller User Guide...
Page 124: ...Chapter 6 3ware Disk Manager 3DM 2 114 3ware 9550SX Serial ATA RAID Controller User Guide...
Page 220: ...Chapter 10 Maintaining Your Controller 210 3ware 9550SX Serial ATA RAID Controller User Guide...
Page 246: ...Appendix A Glossary 236 3ware 9550SX Serial ATA RAID Controller User Guide...
Page 260: ...250 3ware 9550SX Serial ATA RAID Controller User Guide...