HP Insight Management Agents - Manual (Page 44)

◦ Flash Backed Cache Capacitor Failed To Charge—Indicates that write cache operations
have been permanently disabled. The cache has been disabled because the flash backed
cache module capacitor has failed to charge.
◦ Flash Backed Cache Erasing Flash Memory—Indicates that write cache operations have
been temporarily disabled. The cache has been disabled because the flash-backed cache
module is erasing its flash memory.
◦ 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 Cache Module. 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 0.
•
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 Cache Module 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 Cache Module. 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.
•
Current Temperature—Displays the the temperature of the cache module board in degrees
Celsius.
•
Capacitor Temperature —Displays the temperature of the Super-Cap in degrees Celsius.
•
Data Width—Displays the memory data width (in bits), for the attached cache module.
•
Transfer Rate—Displays the memory transfer rate in megatransfers per second (MT/s), for the
attached cache module.
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
44 Agent information