Avago Technologies 3ware 9650SE-12ML (Channel) - Manual (Page 25)

Corrections to 9.5.1 User Guide
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Corrections to 9.5.1 User Guide
Clarification of Rapid RAID Recovery Feature
Following are corrections to the discussion of the Rapid RAID Recovery
feature in the 3ware SAS/SATA RAID Software User Guide, Version 9.5.1.
• In Chapter 8, on page 126, in the section "Rapid RAID Recovery,"
text incorrectly states: “If all of a unit's capacity is being used, there is
no real advantage to Rapid RAID Recovery, but the more your unit's
capacity is under-utilized, the less time a rebuild, initialization or verify
will take if you enable Rapid RAID Recovery.”
Correction: In fact, although the benefit of Rapid RAID Recovery to
rebuilds is reduced when all of a unit's capacity is being used, Rapid
RAID Recovery still provides benefits to array verification and to
initialization after an unclean shutdown, regardless of the disk usage.
• In Chapter 8, on page 126, in the section "Rapid RAID Recovery,"
text incorrectly states: “Currently Rapid RAID Recovery only works
with FAT, FAT32 and NTFS file systems. Linux or FreeBSD file systems
such as Ext3 are not yet supported.”
Correction: Rapid RAID Recovery is OS and file system independent,
since this feature tracks areas of the unit where write activity occurs. File
systems such as FAT, FAT32, NTFS, and XFS are ideally suited to this
implementation. File systems such as EXT2 and EXT3 that write inodes
over the entire disk defeat this approach for faster rebuilds. This issue is
being researched. Protection against unclean shutdowns to provide a fast
verification and initialization is the same regardless of the file system.
Clarification of Enclosure Support
• In Chapter 11, "Managing an Enclosure," on page 206, text
incorrectly states: “Enclosure management features in 3ware software
are available for enclosures with expanders that support SCSI Enclosure
Services 2 (SES-2).
Note: The SAFTE (SCSI Accessed Fault Tolerant Enclosure)
specification is not supported at this time.”
Correction: In fact, while that is true for the 9690SA controllers, CCU-
based enclosure support for the 9650SE controllers is SAF-TE.
Correction about How to Disable Command Logging
• In Chapter 13, “Troubleshooting,” on page 252, text incorrectly states
that if you want to disable command logging, you can do so using the
CLI.