Owner manual

Agent information 40
• Redundant Size Mismatch—Cache operations are temporarily disabled. The cache sizes on the redundant
controllers do not match.
• Redundant Cache Failure—Cache operations are temporarily disabled. The cache on the redundant
controller has failed.
• Excessive ECC Errors—Cache operations have been permanently disabled. The number of cache lines
experiencing excessive ECC errors has reached a preset limit.
• ADG Enabler Missing—Indicates that write cache operations have been temporarily disabled. An advanced
data guarding logical drive is configured but the RAID ADG Enabler Module is broken or missing.
• POST ECC Errors—Indicates that write cache operations have been permanently disabled. The cache has
been disabled due to a large number of ECC errors detected while testing the cache during the Power On
Self Test (POST).
• Battery Hot Removed—Indicates that write cache operations have been permanently disabled. The cache
has been disabled because a battery has been hot removed.
• Capacitor Charge Low—Indicates that write cache operations are temporarily disabled due to insufficient
capacitor power.
• Not Enough Batteries Attached—Indicates that write cache operations have been permanently disabled. The
cache has been disabled because there are not enough batteries attached to the controller to ensure write
cache will be held without power for the advertised length of time.
• Cache Module Not Supported—Indicates that write cache operations have been permanently disabled. The
cache has been disabled because the current cache module is not supported by the currently running
firmware.
• Battery Not Supported—Indicates that write cache operations have been permanently disabled. The cache
has been disabled because one or more attached batteries are not supported by the currently running
firmware.
• No Capacitor Attached—Indicates that write cache operations have been permanently disabled. The cache
has been disabled because there are no capacitors attached to the capacitor based cache module.
• Capacitor Based Backup Failed—Indicates that write cache operations have been permanently disabled. The
cache has been disabled because the capacitor-based cache module backup operation has failed.
• Capacitor Based Restore Failed—Indicates that write cache operations have been permanently disabled. The
cache has been disabled because the capacitor-based cache module restore operation has failed.
• Capacitor Based Hardware Module Failure—Indicates that write cache operations have been permanently
disabled. The cache has been disabled because the capacitor based cache module has encountered a
hardware failure.
• Capacitor Failed To Charge—Indicates that write cache operations have been permanently disabled. The
cache has been disabled because the capacitor based cache module capacitor has failed to charge.
• Unknown—The Storage Agents do not recognize the error code. You may need to update your software.
• Serial Number—Displays the serial number for the Array Accelerator. Use this number for identification
purposes.
• Total Memory—Displays the total amount of accelerator memory, including both battery-backed and non-battery-
backed memory.
• Write Cache—Displays the percentage of cache memory allocated for posted write caching or the amount of
memory allocated for the write cache. If the amount of memory is displayed then the actual usable memory is
half the amount shown because the data is kept in duplicate (mirrored).
• Read Cache—Displays the percentage of cache memory allocated for read ahead caching or the amount of
memory allocated for the read cache. If the amount of memory is displayed then the actual usable memory is
half the amount shown because the data is kept in duplicate (mirrored).
NOTE: Read cache is not available on IDA-2 or SCSI Managed Array Technology (SMART) controllers.
Values for these controllers will be zero.
• Write Errors—Displays the total number of write memory parity errors that were detected while writing to the
Array Accelerator.
Write parity errors occur when the system detects that information has not been transferred to the Array
Accelerator correctly. A parity bit is included for each byte of information stored in memory. When the
microprocessor reads or writes data, the system counts the value of the bits in each byte. If the total does not
match the system's expectations, a parity error has occurred.