HP Insight Management Agents - Manual (Page 40)

— 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.
• Read Errors—Displays the total number of read memory parity errors that were detected
while reading from the Array Accelerator. The mirrored copy of data in the write cache can
be accessed to obtain correct data if a memory parity error occurs.
Memory parity errors occur when the system detects that information has not been transferred
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. A bad memory
chip, memory corruption, or lack of memory refresh may cause memory parity errors.
Identify Drives
Select the length of time to identify the physical drives that are connected to this controller from
the drop-down list box and then click the Start button. The page automatically refreshes and
displays an image of an identified drive and a Stop button. Click the Stop button to end
identification before the time expires.
40 Agent information