Chapter 4. Upgrading The Hardware; Installing Additional Flash Modules - IBM FlashSystem 840 Installation Manual

Chapter 4. Upgrading the hardware

You can upgrade the IBM FlashSystem 840 hardware by adding or replacing
components.

Installing additional flash modules

Learn how to properly add flash modules to the enclosure.
About this task
Attention: The additional flash modules must match the capacity of all other
flash modules in the system. Do not mix flash modules with different capacities.
Attention: To avoid loss of all data on the flash modules, you must back up all of
your data before you install the additional flash modules. This procedure removes
the current array from the existing flash modules.
To add additional flash modules, complete the following steps:
Procedure
© Copyright IBM Corp. 2013,
1. Read the safety precautions in the IBM Systems Safety Notices. These guidelines
help you safely work with the system.
2. Shut down all host I/O to the system.
3. To avoid loss of the data on the array, you must back up all information on
the array before proceeding.
4. Before you install the flash modules, you must remove the existing array. To
view a list of the VDisks in the array, enter the lsvdisk command.
5. To delete the VDisks, enter the rmvdisk -force id CLI command for each
VDisk, where id is the id number of the VDisk being deleted.
6. To verify that the VDisks were deleted, enter the lsvdisk command.
7. To remove the array, enter the rmarray command.
8. To verify that the array was deleted, enter the lsarray command.
You are now ready to add the new flash modules. Flash modules are installed
based on the configuration guidelines in Table 8. For optimal cooling of the
enclosure, if there are fewer than 12 flash modules, they are installed
beginning in the center pair of slots and added on both sides until all 12 slots
are populated.
Table 8. Supported flash module configurations
Number
of
flash Slot Slot
modules RAID 1 2
2 RAID
0
4 RAID
0, 5
8 RAID
0, 5
Slot Slot Slot Slot
3 4 5 6
X
X X
X X X X
Slot Slot Slot Slot
7 8 9 10
X
X X
X X X X
Slot Slot
11 12
41