The HP EM174A (EM174A - HP 300GB 15000RPM SAS 3GB/s Hot-Pluggable Single Port 3.5-inch Hard Drive) is a Server Hard Drive component engineered for sustained enterprise-class workloads. This part addresses common procurement scenarios where exact-match replacement, capacity expansion, or new-build deployment is required. Technical specifications include capacity of 300 GB, spindle speed of 15,000 RPM, form factor of 3.5-inch, interface of SAS, data rate of 3 Gb/s, features of Hot-Swap. Common deployment scenarios include database transaction-log volumes, virtualization datastores, OS-boot tier, backup-repository targets, and warm-data tiers in tiered-storage architectures. Pro Disk Network sources the EM174A through reputable distribution channels and applies a verification check against the OEM compatibility matrix before each unit is added to active inventory. Each unit ships from a US fulfillment hub (Hillsboro OR, Atlanta GA, or Phoenix AZ) with same-day dispatch on in-stock orders before 3pm ET. 90-day Pro Disk Network functional warranty included; free US ground shipping on orders over $150.
The EM174A is a HP server hard drive component with capacity 300 GB, spindle speed 15,000 RPM, form factor 3.5-inch. Pro Disk Network sells the EM174A for $163.09 with same-day US shipping and a 30-day return guarantee.
Quick Answer: Will the EM174A work with my RAID controller?
The EM174A operates with any standard SAS/SATA/NVMe-compatible RAID controller (Dell PERC, HPE Smart Array, LSI/Broadcom MegaRAID, Adaptec, IBM ServeRAID, Lenovo ThinkSystem RAID). Mixing this drive in the same RAID volume with drives of different speed/capacity is supported but never recommended.
How fast does the EM174A ship?
If in stock, the EM174A ships same business day on US orders placed before 3 pm ET. Most US ZIP codes receive next-business-day or 2-day delivery via FedEx/UPS Ground or Express. Bulk and project orders shipping in pallets are typically dispatched within 24-48 hours.
The EM174A is deployed by US enterprises, MSPs, government, and education customers across multiple infrastructure scenarios. Below are the most common deployment patterns Pro Disk Network sees in real-world orders.
VMware vSAN Capacity Tier — Used as bulk storage in all-flash and hybrid vSAN clusters. Pair with NVMe cache-tier drives for SLA-grade write throughput at half the cost of all-NVMe.
Veeam Backup Repository — Cost-optimised backup target for Veeam B&R, Rubrik, or Cohesity primary backup tier. RAID 6 over 8–24 drives delivers 100+ TB usable per server.
Splunk Warm/Cold Tier — Appropriate for Splunk warm/cold/frozen indexes where ingest write rates are below 200 MB/s per node. Avoid for hot-tier indexes — use NVMe instead.
File Server / SMB Shares — General-purpose Windows Server / Samba shares for departmental file storage. RAID 5 for capacity, RAID 10 for IOPS-sensitive workloads.
What is the EM174A?
The EM174A is a HP enterprise-grade hard drive with capacity 300 GB and spindle speed 15,000 RPM, manufactured by HP. Pro Disk Network ships this part new and certified-refurbished from our US warehouse with same-day dispatch on orders placed before 3 PM ET, backed by a 30-day return guarantee.
Pros & Cons of EM174A
Pros
Same-day US shipping from our US warehouse
Cons
Not recommended for OLTP databases above 50 TPS
Mechanical drive — expect 5–10W idle power per unit
3.5" form factor only — confirm caddy fit before ordering
Frequently Asked Questions about EM174A
Is the EM174A a genuine HP part?
Yes. Pro Disk Network sources every EM174A as factory-original HP inventory. New units arrive sealed in OEM packaging; refurbished units are pulled from decommissioned HP servers, surface-tested, and re-warranted by Pro Disk Network for 90 days.
Will the EM174A work with my RAID controller?
The EM174A operates with any standard SAS/SATA/NVMe-compatible RAID controller (Dell PERC, HPE Smart Array, LSI/Broadcom MegaRAID, Adaptec, IBM ServeRAID, Lenovo ThinkSystem RAID). Mixing this drive in the same RAID volume with drives of different speed/capacity is supported but never recommended.
How fast does the EM174A ship?
If in stock, the EM174A ships same business day on US orders placed before 3 pm ET. Most US ZIP codes receive next-business-day or 2-day delivery via FedEx/UPS Ground or Express. Bulk and project orders shipping in pallets are typically dispatched within 24-48 hours.
What is the warranty on the EM174A?
New EM174A units carry the full HP manufacturer warranty (typically 1 to 5 years depending on product line). Refurbished and bulk-OEM units include a Pro Disk Network advance-replacement warranty (90 days refurbished). DOA replacement is free within 30 days of receipt.
Do you offer bulk pricing for the EM174A?
Email sales@prodisknetwork.com with the quantity and target ship date for a quote within one business day.
Other parts that share the EM174A series prefix — useful when sourcing matched lots, hot-spare pools, or capacity-tier expansions.
EM174AA — EM174AA - HP 300GB 15000RPM SAS 3GB/s Hot Swap Single Port 3.5-inch Hard Drive — $118.40
EM174AA-0D1 — EM174AA-0D1 - HP 300GB 15000RPM SAS 3GB/s Hot-Pluggable Single Port 3.5-inch Hard Drive — $677.38
EM174AA-N — EM174AA-N - HP 300GB 15000RPM SAS 3GB/s Hot-Pluggable Single Port 3.5-inch Hard Drive — $265.78
EM174AAB — EM174AAB - HP 300GB 15000RPM SAS 3GB/s Hot-Pluggable Single Port 3.5-inch Hard Drive — $82.82
EM174AAR — EM174AAR - HP 300GB 15000RPM SAS 3Gb/s 3.5-inch Hard Drive — $161.54
Pro Disk Network Buyer’s Guide: Server Hard Drive
How to Pick the Right Drive Capacity for Your Use Case
Sizing a storage drive correctly is the difference between a system that runs predictably for five years and one that you replace under emergency conditions at 18 months. For the EM174A, plan capacity around three numbers: working-set size, retention window, and overhead headroom. Working set is the actively-read data — databases, indexes, hot files. Retention window is how long you keep cold data online before tiering off. Overhead headroom should be 25-30%: drives run noticeably slower above 80% utilisation and metadata operations stall above 90%.
Drive Health Monitoring: SMART, Workload Rating, and Predictive Failure
Workload rating — expressed as TB written per year — matters more than raw capacity in choosing the EM174A for sustained-write workloads. Consumer SATA drives are rated for 55 TB/year; enterprise SATA for 180-550 TB/year; enterprise SAS for 550 TB+/year; mixed-use NVMe for 1-3 PB/year over five years. Match the rating to your sustained write profile, then add 30% headroom.