IBM S1112 EJMT 4-Core Power 11 Processor System
The 4-core S1112 rack configuration aimed at IBM i P05 buyers who want the smallest current Power11 entry point.
The IBM S1112 EJMT configuration is the most direct answer to a simple buyer question: what is the smallest current Power11 system that still gives an IBM i shop a legitimate modernization path? Midland's published 9242-21B-EJMT configuration details make clear that this is the S1112 variant built around that use case.
It keeps the same compact half-width 2U platform as the wider S1112 family, but it stays in IBM i Software Tier P05 and aligns tightly to smaller IBM i footprints that do not need the broader mixed-workload headroom of the 10-core EJSV build.
Quick technical snapshot
Why this configuration exists
The EJMT build exists for buyers whose planning conversation starts with IBM i first, not Linux or AIX first. It gives those organizations a Power11 generation box without pushing them into a higher IBM i software tier or a larger chassis than they actually need.
That matters because many smaller IBM i environments are not constrained by raw socket count. They are constrained by staying in a lower software tier, fitting into a modest memory footprint, and refreshing aging hardware with the least possible application disruption. The EJMT configuration is designed around exactly that combination of priorities.
What the EJMT configuration can and cannot do for IBM i
| Area | EJMT reality | Interpretation |
|---|---|---|
| IBM i software tier | P05 | This is the most important reason many IBM i buyers will shortlist EJMT first. |
| IBM i core usage | 4 cores | If your IBM i workload is already pushing past what 4 cores can realistically absorb, you should compare S1122 instead of trying to force-fit S1112. |
| IBM i memory use | 64 GB maximum for IBM i per Midland's published S1112 guidance | The platform can carry more memory, but native IBM i planning should still be done around the smaller ceiling. |
| IBM i internal storage | Up to 6.4 TB after mirroring in Midland's published examples | Suitable for compact internal-storage designs, not a substitute for a broader storage architecture when data growth is heavy. |
| Mixed workloads | Yes, with AIX, Linux, or VIOS on the same platform | Extra resources can still be useful even when IBM i itself stays tightly bounded. |
Hardware profile
| Component | Published detail | What it means in practice |
|---|---|---|
| Memory | Up to 512 GB DDR5 across 4 DDIMM slots | Good platform flexibility, though IBM i buyers should not confuse platform memory ceiling with native IBM i entitlement. |
| Internal flash | 4 NVMe U.2 bays up to 12.8 TB raw | Works for compact all-flash internal designs before external storage becomes necessary. |
| Direct I/O | 4 direct PCIe slots | Enough for targeted networking, SAN, tape, or graphics needs, but still an entry system. |
| Expansion | Optional ENZ0 PCIe Gen4 expansion drawer | Adds room when the direct-slot count is no longer enough. |
| Management | Embedded BMC plus dedicated HMC 1 GbE port | Keeps the platform aligned with standard PowerVM and HMC operational habits. |
| Power and cooling | Redundant hot-swap cooling and redundant hot-swap AC Titanium power supplies | Important for buyers who want entry size without giving up the higher-end operational posture expected from Power. |
Operating system support
Midland's July 2026 S1112 configuration pages list IBM i 7.6 TR2, IBM i 7.5 TR8, and IBM i 7.4 TR12 with additional PTFs as supported IBM i levels, while IBM's July 15, 2026 IBM i TR8 enhancement notes explicitly call out the S1112 as the new entry Power11 server for P05 customers. The same Midland pages also summarize supported AIX, VIOS, Red Hat Enterprise Linux, OpenShift, and SUSE levels for mixed-workload planning.
Planning rule: if you are buying EJMT mainly for IBM i, verify OS readiness first and capacity second. On S1112, OS level and IBM i software tier drive the shortlist as much as raw benchmark numbers do.
EJMT versus EJSV: the real buyer question
| Question | EJMT 4-core | EJSV 10-core |
|---|---|---|
| IBM i tier | P05 | P10 |
| Best fit | Pure or mostly IBM i entry refresh | Mixed IBM i plus AIX, Linux, or VIOS growth |
| Why buy it | Cheapest clean route into current Power11 for small IBM i estates | Better aggregate compute and virtualization headroom in the same compact chassis |
| When it is the wrong choice | If you already know your IBM i estate or mixed workloads will outgrow the platform quickly | If you are paying for extra platform cores that your workload mix will never use |
If the project is essentially a small IBM i refresh, EJMT is the configuration that makes the cleanest financial and operational story. If the plan includes Linux services, AIX applications, or VIOS-heavy mixed partitioning beside IBM i, the EJSV page becomes the more relevant comparison.
Best-fit scenarios
Strong fit
Single-production IBM i system refreshes, compact ERP or transaction processing environments, smaller branch offices, and buyers staying deliberately inside the P05 tier.
Use caution
Growth-heavy IBM i environments, memory-hungry databases, or mixed workloads that clearly need more than an entry chassis should compare the S1122 before locking onto EJMT.