The Toshiba MK4025GAS (MK4025GAS - Toshiba 40GB 4200RPM IDE Ultra ATA-100 8MB Cache Super Slimline 9.5mm 2.5-Inch Notebook Hard Disk Drive) is a Laptop 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 spindle speed of 4,200 RPM, form factor of 2.5-inch, interface of IDE, cache of 8MB. 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 maintains the MK4025GAS in our enterprise inventory and verifies each unit against manufacturer datasheet specifications prior to listing. New stock ships factory-sealed where available; refurbished units are tested under load before dispatch and ship with a 90-day Pro Disk Network functional warranty. Same-day dispatch on in-stock orders placed before 3pm ET; free standard ground shipping on US orders over $150.
The MK4025GAS is a Toshiba laptop hard drive component with spindle speed 4,200 RPM, form factor 2.5-inch, interface IDE. Pro Disk Network sells the MK4025GAS for $157.07 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 MK4025GAS are shown on this page.
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Quick Answer: Will the MK4025GAS work with my RAID controller?
The MK4025GAS 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 MK4025GAS ship?
Pro Disk Network dispatches the MK4025GAS 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 MK4025GAS 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 MK4025GAS?
The MK4025GAS is a Toshiba enterprise-grade hard drive with spindle speed 4,200 RPM and form factor 2.5-inch, manufactured by Toshiba. 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 MK4025GAS
Pros
Same-day US shipping from our US warehouse
Cons
Designed for capacity tier, not write-intensive cache
Not a drop-in for desktop NAS without verifying caddy
Some firmware revs locked to specific RAID-controller families
Frequently Asked Questions about MK4025GAS
Is the MK4025GAS a genuine Toshiba part?
Yes. Pro Disk Network sources every MK4025GAS as factory-original Toshiba inventory. New units arrive sealed in OEM packaging; refurbished units are pulled from decommissioned Toshiba servers, surface-tested, and re-warranted by Pro Disk Network for 90 days.
Will the MK4025GAS work with my RAID controller?
The MK4025GAS 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 MK4025GAS ship?
Pro Disk Network dispatches the MK4025GAS 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 MK4025GAS?
New MK4025GAS units carry the full Toshiba 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 MK4025GAS?
Email sales@prodisknetwork.com with the quantity and target ship date for a quote within one business day.
Other parts that share the MK4025 series prefix — useful when sourcing matched lots, hot-spare pools, or capacity-tier expansions.
MK4025GASL — MK4025GASL - Toshiba 40GB 4200RPM IDE 8MB Cache 2.5-Inch Hard Disk Drive — $217.42
Pro Disk Network Buyer’s Guide: Laptop Hard Drive
How to Pick the Right Drive Capacity for Your Use Case
If the MK4025GAS 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 MK4025GAS 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.