Hot-upgrading memory, Hot-upgrading memory -18 – HP ProLiant DL740 Server User Manual
Page 117
Installing Hardware Options, Hot-Plug
Hot-Upgrading Memory
For the hot-upgrade feature to work on the ProLiant DL740 server, the operating
system must have driver support. Refer to “Installing HP Drivers and Utilities” in
Chapter 8 for details on installing HP software. HP recommends having all DIMMs
that will replace existing DIMMs available before beginning this upgrade procedure.
An upgrade is replacing smaller size DIMMs with larger size DIMMs.
CAUTION: A redundant memory configuration is required when performing Hot Plug
RAID Memory functions.
•
If all five memory cartridges are online and error free, any memory cartridge can
be removed.
•
If one of the five memory cartridges requires attention, only that memory
cartridge can be removed.
•
If two or more memory cartridges require attention and are online (cartridge
power LED is illuminated), then no cartridge can be removed. An audible alarm
will sound if any cartridge is unlocked.
IMPORTANT: You cannot perform a hot-upgrade of memory if only four memory cartridges
are installed. The system must have a redundant memory configuration (five memory
cartridges online and error-free) before the hot-upgrade feature will function.
To upgrade existing DIMMs with new ones, the DIMMs must be replaced in bank
pairs across all five of the memory cartridges, one cartridge at a time. Memory must
be added and the cartridge brought back online before the next cartridge can be taken
offline.
IMPORTANT: Hot-upgrading of memory results in the system switching into a safe memory
timing mode from the time the first cartridge is installed with upgraded memory until all five
cartridges have upgraded memory and the memory is made available to the operating system.
During this time, some applications may show a decrease in performance, but the system will
continue to operate.
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HP ProLiant DL740 Server User Guide
HP CONFIDENTIAL
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