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<h3><b><a name="top">Memory</a></b></h3>
<p>Use this window to view information about the memory arrays installed in your system.</p>
<h4><b>User Privileges</b></h4>
<table border="2" cellpadding="4" cellspacing="3">
<tr>
<td width="61" align="left" valign="top" rowspan="2"><p align="left">
<b>Selection</b></td>
<td width="366" colspan="2" align="center" height="1" valign="top"><b>User Privileges</b></td>
</tr>
<tr>
<td width="366" colspan="2" align="center" valign="top"><i>U=User; P=Power
User; A=Administrator; NA=Not Applicable</i></td>
</tr>
<tr>
<td width="61" height="21" align="left" valign="top"> </td>
<td width="224" height="21" align="center" valign="top"><b>View</b></td>
<td width="129" height="21" align="center" valign="top"><b>Manage</b></td>
</tr>
<tr>
<td width="61" height="21" align="left" valign="top">Memory</td>
<td width="224" align="center" height="21" valign="top">U, P, A</td>
<td width="129" align="center" height="21" valign="top">A</td>
</tr>
</table><br>
<table id="table1" border="0">
<tr>
<td vAlign="top" align="left" width="21">
<img border="0" src="note.gif" width="17" height="17"></td>
<td><span class="notes">NOTE: </span>For more details on user privilege
levels, see "<a href="../../oma/en/UserLevels.html">Privilege Levels
in the Server Administrator GUI</a>."</td>
</tr>
</table>
<p>Random-access memory (RAM) is the system's primary storage area for program
instructions and data. Each location in the RAM is identified by a number called a memory
address. This requires your system to have addressable memory available to it when
performing tasks. Any information stored in RAM is lost when you turn off your system.</p>
<p>The <b>Memory</b> window displays information about the following:</p>
<p><a href="#memory_redundancy">Memory Redundancy</a></p>
<p><a href="#attributes">Attributes of Memory Arrays</a></p>
<p><a href="#total">Total of Memory Arrays</a></p>
<p><a href="#connector">Details of Memory Array <i><n></i></a></p>
<p><a href="MemoryDevice.html">Memory Device</a></p>
<p>[<a href="#top">Back to Top</a>]</p>
<h4>Reboot System Button</h4>
<p>When you make changes to the Memory Redundancy Configuration and save those changes, a <b>Reboot
System</b> button appears. If you click this button, you receive more messages confirming
that you want to reboot your system. Rebooting your system gives effect to the <b>Redundancy
Configuration</b> setting changes you have just made. </p>
<h4><a name="memory_redundancy">Memory</a> <a name="memory_redundancy0">
Redundancy</a></h4>
<table cellPadding="4" border="0" width="80%">
<tr>
<td vAlign="top" width="17"><img border="0" src="note.gif" width="17" height="17"></td>
<td><span class="notes">NOTE:</span> Server Administrator supports this feature only if
the managed server supports redundant memory. </td>
</tr>
</table><br>
<table cellPadding="4" border="0" width="80%">
<tr>
<td vAlign="top" width="17"><img border="0" src="note.gif" width="17" height="17"></td>
<td><span class="notes">NOTE:</span> If your system supports memory redundancy and is set
in any of the Redundancy modes, a memory redundancy failure <font color="#000000">does</font><font
color="#FF00FF"> </font>not trigger an alert action. </td>
</tr>
</table>
<p>Redundant memory enables a server to switch to different memory modules if unacceptable
errors are detected in the modules it is currently using. Server Administrator supports
three redundant memory modes: <i>spare</i>, <i>mirroring</i>, and <i>RAID5</i>. You
can enable or disable redundant memory and specify which mode to use when enabled. Systems
may support more than one redundant memory mode.</p>
<p>Spare mode disables a set of system memory in which a single-bit ECC error is
detected, enables the spare set, and copies all the data from the original set
to the spare set. Spare more requires enough memory for the system to reserve a
spare set; the amount of memory required for a spare set varies by system. The
operating system does not recognize the spare set.</p>
<p>Mirroring mode switches to using a redundant copy of memory when a multibit error is
detected. After accessing mirrored memory, the system does not switch back to using the
original system memory until the next reboot. The operating system does not recognize half
of the installed system memory in this mode. </p>
<p>RAID5 mode gives you an extra level of memory checking and error recovery, at the
expense of some memory capacity. The RAID mode supported is RAID level 5 striping with
rotational parity. </p>
<table border="0" cellspacing="4" cellpadding="3" width="80%">
<tr>
<td class="data-area-canvas-odd" vAlign="top" width="30%" align="left" colspan="2"><strong>Redundancy
Status</strong></td>
<td class="data-area-canvas-odd" vAlign="top" width="70%" align="left">Indicates the
health of the current redundant memory mode. Values are <em>Full</em> and <em>Lost</em>. <p><em>Full</em>
indicates that a device may fail but the system <font color="#000000">remains</font>
functional. This status is reported if the <font color="#000000">spare, mirroring, or
RAID5 is enabled but not in active use and all DIMMs have an OK status.</font></p>
<p><font color="#000000"><em>Lost</em> indicates that the system is not redundant, and
that an additional device failure will result in a system failure. This status is reported
if spare, mirroring, or RAID5 is enabled and is in active use.</font></td>
</tr>
<tr>
<td class="data-area-canvas-odd" vAlign="top" width="30%" align="left" colspan="2"><strong>Fail
Over State</strong></td>
<td class="data-area-canvas-odd" vAlign="top" width="70%" align="left">Indicates if spare, mirroring, or RAID5 is currently in use. Values are <i>Active</i> and <i>Inactive</i>.
<p><font color="#000000"><em>Active</em> indicates that the spare, mirroring, or
RAID5 is in use.</font></p>
<p><font color="#000000"><em>Inactive</em> indicates that the spare, mirroring, or
RAID5 is not in use.</font></p>
<p><font color="#000000">If <strong>Fail Over State</strong> is <i>Active</i>, <strong>Redundancy
Status</strong> is <i>Lost</i>.</font></td>
</tr>
<tr>
<td class="data-area-canvas" vAlign="top" width="30%" align="left" colspan="2"><strong>Redundancy
Configuration</strong></td>
<td class="data-area-canvas" vAlign="top" width="70%" align="left">Allows selection of the
desired redundant memory mode, or disables redundant memory.</td>
</tr>
<tr>
<td class="data-area-canvas" vAlign="top" width="2%" align="left"></td>
<td class="data-area-canvas" vAlign="top" width="15%" align="left"><strong>Disabled</strong></td>
<td class="data-area-canvas" vAlign="top" width="70%" align="left">Indicates that the
system is not to use other available memory modules if memory errors are
detected. </td>
</tr>
<tr>
<td class="data-area-canvas" vAlign="top" width="5%" align="left"></td>
<td class="data-area-canvas" vAlign="top" width="25%" align="left"><strong>Spare</strong></td>
<td class="data-area-canvas" vAlign="top" width="70%" align="left">Disables the memory
module that has a single-bit memory error and copies the failing module’s data to a
spare set. </td>
</tr>
<tr>
<td class="data-area-canvas" vAlign="top" width="5%" align="left"></td>
<td class="data-area-canvas" vAlign="top" width="25%" align="left"><p align="left"><strong>Mirroring</strong></td>
<td class="data-area-canvas" vAlign="top" width="70%" align="left">Switches the system to
a mirrored copy of the memory if the failing module has a multibit error. In mirrored
mode, the operating system does not switch back to the original module until the system
reboots. </td>
</tr>
<tr>
<td class="data-area-canvas" vAlign="top" width="2%" align="left"></td>
<td class="data-area-canvas" vAlign="top" width="15%" align="left"><strong>RAID5</strong></td>
<td class="data-area-canvas" vAlign="top" width="70%" align="left">A method of system
memory configuration. This is logically similar to the RAID5 mode used in hard drive
storage systems. This memory mode gives you an extra level of memory checking and error
recovery, at the expense of some memory capacity. The RAID mode supported is RAID level 5
striping with rotational parity.</td>
</tr>
</table>
<p>[<a href="#top">Back to Top</a>]</p>
<h4><a name="attributes">Attributes of Memory Array</a>(s)</h4>
<p>This menu displays fields and values for a particular memory array that is installed on
your system. Memory attributes include fields describing the maximum capacity versus the
actual installed RAM of the system at a given point in time. Attributes and fields are
listed for each memory array installed in the system.</p>
<table border="0" cellspacing="4" cellpadding="3" width="80%">
<tr>
<td class="data-area-canvas-odd" vAlign="top" width="30%" align="left"><strong>Location</strong></td>
<td class="data-area-canvas-odd" vAlign="top" width="70%" align="left"><font
color="#000000">Indicates the place where the memory array resides, for example, on the
system board, or in an expansion card such as Industry Standard Architecture (ISA),
Extended ISA (EISA), or Peripheral Component Interconnect (PCI), NUBUS, or various types
of PC-98 expansion cards.</font></td>
</tr>
<tr>
<td class="data-area-canvas" vAlign="top" width="30%" align="left"><strong>Use</strong></td>
<td class="data-area-canvas" vAlign="top" width="70%" align="left"><font color="#000000">Indicates
the function to which this memory array is dedicated; for example, system memory, video
memory, flash memory, nonvolatile RAM, or cache.</font></td>
</tr>
<tr>
<td class="data-area-canvas-odd" vAlign="top" width="30%" align="left"><strong>Installed
Capacity</strong></td>
<td class="data-area-canvas-odd" vAlign="top" width="70%" align="left"><font
color="#000000">Displays the amount of RAM that is presently installed in the system.</font></td>
</tr>
<tr>
<td class="data-area-canvas" vAlign="top" width="30%" align="left"><strong>Maximum
Capacity</strong></td>
<td class="data-area-canvas" vAlign="top" width="70%" align="left"><font color="#000000">Displays
the maximum RAM capacity of the system when all available sockets are occupied.</font></td>
</tr>
<tr>
<td class="data-area-canvas" vAlign="top" width="30%" align="left"><strong>Slots Available</strong></td>
<td class="data-area-canvas" vAlign="top" width="70%" align="left"><font color="#000000">Displays
the total number of slots available in this memory array.</font></td>
</tr>
<tr>
<td class="data-area-canvas" vAlign="top" width="30%" align="left"><strong>Slots Used</strong></td>
<td class="data-area-canvas" vAlign="top" width="70%" align="left"><font color="#000000">Displays
the number of slots that are populated with memory modules in this array.</font></td>
</tr>
<tr>
<td class="data-area-canvas" vAlign="top" width="30%" align="left"><strong>ECC Type</strong></td>
<td class="data-area-canvas" vAlign="top" width="70%" align="left">Identifies the ECC type
that this memory can perform. For example, parity, single-bit, multibit, cyclic redundancy
checking (CRC).</td>
</tr>
</table>
<p>[<a href="#top">Back to Top</a>]</p>
<h4><a name="total">Total of Memory Array(s)</a></h4>
<p>This menu includes fields for installed memory, the amount of installed memory that is
available to the operating system, and the maximum memory capacity if all memory slots are
occupied.</p>
<table border="0" cellspacing="4" cellpadding="3" width="80%">
<tr>
<td class="data-area-canvas-odd" vAlign="top" width="30%" align="left"><strong>Total
Installed Capacity</strong></td>
<td class="data-area-canvas-odd" vAlign="top" width="70%" align="left"><font
color="#000000">Displays the total memory installed in the entire system.</font></td>
</tr>
<tr>
<td class="data-area-canvas-odd" vAlign="top" width="30%" align="left"><strong>Total
Installed Capacity Available to the OS</strong></td>
<td class="data-area-canvas-odd" vAlign="top" width="70%" align="left"><font
color="#000000">Displays the total memory installed and available to the operating system.</font></td>
</tr>
<tr>
<td class="data-area-canvas" vAlign="top" width="30%" align="left"><strong>Total Maximum
Capacity</strong></td>
<td class="data-area-canvas" vAlign="top" width="70%" align="left"><font color="#000000">Displays
the total memory that can be installed in the entire system when all memory slots are
occupied.</font></td>
</tr>
</table>
<p>[<a href="#top">Back to Top</a>]</p>
<h4><a name="connector">Details of Memory Array <i><n></i></a></h4>
<p>This menu provides details about a specific memory array.</p>
<table border="0" cellspacing="4" cellpadding="3" width="80%">
<tr>
<td class="data-area-canvas-odd" vAlign="top" width="30%" height="38" align="left"><strong>Status</strong></td>
<td class="data-area-canvas-odd" vAlign="top" width="70%" height="38" align="left"><i>Normal</i>,
<i>Prefailure</i>, or <i>Failure</i> performance of the memory module.</td>
</tr>
<tr>
<td class="data-area-canvas" vAlign="top" width="30%" align="left"><strong>Connector Name</strong></td>
<td class="data-area-canvas" vAlign="top" width="70%" align="left">The alphanumeric text
that uniquely identifies each memory slot, whether occupied or unoccupied.</td>
</tr>
<tr>
<td class="data-area-canvas" vAlign="top" width="30%" align="left"><strong>Type</strong></td>
<td class="data-area-canvas" vAlign="top" width="70%" align="left">Synchronous dynamic
random access memory (SDRAM) chips operate fast enough to synchronize with the CPU clock,
eliminating wait states. The SDRAM chip set has two cell blocks, allowing more efficient
data access. In dynamic random access memory (DRAM) each bit of storage is built from a
single transistor and capacitor, allowing more memory bits to fit in the same chip set
area. However, DRAM has to be refreshed because the charge on the capacitor, which
represents the stored bit value, decays with time. During a refresh, the memory module
must read every bit and write it back at full strength.</td>
</tr>
<tr>
<td class="data-area-canvas" vAlign="top" width="30%" height="1" align="left"><strong>Size</strong></td>
<td class="data-area-canvas" vAlign="top" width="70%" height="1" align="left">Capacity of
the memory slot, expressed in MB.</td>
</tr>
</table>
<p>[<a href="#top">Back to Top</a>]</p>
<h4>Other Window Controls</h4>
<table cellSpacing="3" cellPadding="4" width="80%" border="0">
<tbody>
<tr>
<td vAlign="top" align="left" width="30%"><b>Print</b></td>
<td vAlign="top" align="left" width="70%">Prints a copy of the open window to your default
printer.</td>
</tr>
</tbody>
</table>
<table cellSpacing="3" cellPadding="4" width="80%" border="0">
<tbody>
<tr>
<td vAlign="top" width="30%"><b>Export</b></td>
<td vAlign="top" width="70%">Saves a text file containing the contents of this window (the
values of each data field separated by a customizable delimiter) to a destination you
specify.</td>
</tr>
</tbody>
</table>
<table cellSpacing="3" cellPadding="4" width="80%" border="0">
<tbody>
<tr>
<td vAlign="top" align="left" width="30%"><b>Email</b></td>
<td vAlign="top" align="left" width="70%">E-mails the contents of this window to your
designated recipient. See the <em>Server Administrator User's Guide</em> for instructions
about configuring your Simple Mail Transfer Protocol (SMTP) server.</td>
</tr>
<tr>
<td vAlign="top" align="left" width="30%"><b>Refresh</b></td>
<td vAlign="top" align="left" width="70%">Updates the screen with latest
information.</td>
</tr>
</tbody>
</table>
<p>[<a href="#top">Back to Top</a>]</p>
<p> </p>
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