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Figure 11. Inserting the new power interposer
7. Replace the PSU that was removed in step "1" on page 27. Follow the procedure that is described in
"Removing and replacing a power supply unit" on page 23.
8. Reconnect all cables.
Miscellaneous equipment specification (MES) instructions
Any ESS 3000 hardware change, which can be an addition, improvement, removal, or any combination of
three can be done by using the MES instructions.
ESS 3000 storage drives MES upgrade
An offline IBM Elastic Storage System 3000 (ESS 3000) MES upgrade is supported for customers who
want to upgrade a 12-drive ESS 3000 to a 24-drive ESS 3000.
To upgrade the system, the NVMe drives with the same size as the existing 12 drives must be used. This
MES upgrade makes the available storage double in the existing ESS 3000. For this offline procedure, a
planned downtime is required. Existing customer recovery group and file system data are preserved
before the MES upgrade.
Supported path: 12 NVMe ESS 3000 -> 24 NVMe ESS 3000
Prerequisites
• All new or existing building blocks must be at the ESS 5.3.5.1 or ESS 3000 6.0.0.1 level. If the setup has
any protocol nodes, these nodes must also be upgraded to ESS 5.3.5.1 levels (underlying code + IBM
Spectrum Scale 5.0.4.2 verified by using the gssinstallcheck command).
• The system must be healthy before the ESS 3000 storage MES upgrade.
• The existing ESS 3000 must be a properly installed 12 NVMe system with 12 NVMe drives correctly
located in slots 1-6 and 13-18.
• All file systems that use the ESS 3000 that is being upgraded must be unmounted.
• All cluster functions, for example, quorum or manager, stop on the two canister servers. If the canister
servers need to be up to maintain cluster quorum, then either other quorum nodes must be defined and
made available or GPFS on the whole cluster must be shut down.
• Unlike a regular ESS MES upgrade, you need not to ensure that all recovery groups in the cluster are
converted to the mmvdisk management because the mmvdisk management is already required for ESS
3000.
• LBS must wear an ESD wrist band when they work on the hardware, for example, inserting NVMe drives.
MES upgrade considerations
• Do not try to configure call home before MES is complete, that is, until the resizing is done.
28 IBM Elastic Storage System 3000: Service Guide
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