This Western Digital AC22100-40LA delivers Desktop Hard Drive functionality and is built for 24/7 enterprise duty cycles. Technical specifications include spindle speed of 5,200 RPM, form factor of 3.5-inch, cache of 128KB. Workload fit covers Hyper-V cluster storage, Proxmox VE shared storage, Ceph OSDs, MinIO erasure-coded pools, and bulk file-server (SMB/NFS) duty. Pro Disk Network supplies the AC22100-40LA to US business buyers. Stocked units ship same-day on in-stock orders placed before 3pm ET. Pro Disk Network applies a 90-day functional warranty. Free US ground shipping on orders over $150; same-day expedited (UPS Next Day Air, FedEx Priority) available at checkout.
The AC22100-40LA is a Western Digital desktop hard drive component with spindle speed 5,200 RPM, form factor 3.5-inch, cache 128KB. Pro Disk Network sells the AC22100-40LA for $347.32 with same-day US shipping and a 30-day return guarantee.
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Reviewed by:Pro Disk Network Engineering Team — . Specifications, compatibility, and pricing for the AC22100-40LA are shown on this page.
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Quick Answer: Will the AC22100-40LA work with my RAID controller?
The AC22100-40LA 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 AC22100-40LA ship?
Pro Disk Network dispatches the AC22100-40LA same-day on orders confirmed before 3 pm ET. Multi-pallet projects requiring crating ship within 2 business days. International shipping (Canada, Mexico, EU, APAC) takes 3-7 business days via DHL Express or FedEx International Priority.
The AC22100-40LA 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.
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.
Object Storage (Ceph / MinIO) — JBOD presentation behind Ceph OSDs or MinIO erasure-coded pools. Mix with NVMe metadata drives for production object stores.
What is the AC22100-40LA?
The AC22100-40LA is a Western Digital enterprise-grade hard drive with spindle speed 5,200 RPM and form factor 3.5-inch, manufactured by Western Digital. 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 AC22100-40LA
Pros
Direct-to-rack shipping on multi-pack orders
Sequential serial-number bundling for cluster builds
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 AC22100-40LA
Is the AC22100-40LA a genuine Western Digital part?
Yes. Pro Disk Network sources every AC22100-40LA as factory-original Western Digital inventory. New units arrive sealed in OEM packaging; refurbished units are pulled from decommissioned Western Digital servers, surface-tested, and re-warranted by Pro Disk Network for 90 days.
Will the AC22100-40LA work with my RAID controller?
The AC22100-40LA 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 AC22100-40LA ship?
Pro Disk Network dispatches the AC22100-40LA same-day on orders confirmed before 3 pm ET. Multi-pallet projects requiring crating ship within 2 business days. International shipping (Canada, Mexico, EU, APAC) takes 3-7 business days via DHL Express or FedEx International Priority.
What is the warranty on the AC22100-40LA?
New AC22100-40LA units carry the full Western Digital 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 AC22100-40LA?
Email sales@prodisknetwork.com with the quantity and target ship date for a quote within one business day.
Other parts that share the AC22100 series prefix — useful when sourcing matched lots, hot-spare pools, or capacity-tier expansions.
AC22100 — AC22100 - Western Digital Caviar 22100 2.1GB 5200RPM ATA-33 128KB Cache 3.5-inch Hard Drive — $189.47
AC22100-00LA — AC22100-00LA - Western Digital Caviar 22100 2.1GB 5200RPM ATA-33 128KB Cache 3.5-inch Hard Drive — $347.32
AC22100-32LA — AC22100-32LA - Western Digital 2GB 5200RPM ATA-33 3.5-inch Hard Drive — $347.32
AC22100-40H — AC22100-40H - Western Digital 2GB 5200RPM ATA-33 3.5-inch Hard Drive — $347.32
AC22100-60LA — AC22100-60LA - Western Digital 2GB 5200RPM ATA-33 3.5-inch Hard Drive — $347.32
AC22100-75H — AC22100-75H - Western Digital 2GB 5200RPM ATA-33 3.5-inch Hard Drive — $347.32
AC22100-75LA — AC22100-75LA - Western Digital Caviar 22100 2.1GB 5200RPM ATA-33 128KB Cache 3.5-inch Hard Drive — $347.32
Pro Disk Network Buyer’s Guide: Desktop Hard Drive
How to Pick the Right Drive Capacity for Your Use Case
If the AC22100-40LA is going into a RAID array, choose RAID 6 over RAID 5 for any capacity tier built from drives larger than 4 TB. The probability of a second drive failing during rebuild from a 6+ TB rebuild window is high enough that single-parity is no longer responsible. For all-flash arrays, RAID 10 still wins on write-amplification-sensitive workloads (OLTP databases, VDI write-cache).
Drive Health Monitoring: SMART, Workload Rating, and Predictive Failure
Once the AC22100-40LA is in production, the single most impactful operational practice is SMART monitoring tied to your existing alerting stack. SMART attributes 187 (reported uncorrectable errors), 197 (current pending sector count), and 198 (offline uncorrectable sector count) are the leading indicators of impending drive failure. Alert on non-zero values, not just on absolute thresholds; once these attributes leave zero, the drive has typically 30-90 days of useful life remaining.