Replacement for MK4055GSX: Drop-In Alternatives We Stock
Looking for a replacement for the MK4055GSX (MK4055GSX - Toshiba 400GB 5400RPM 8MB Cache SATA 3GB/s (SATA 3GBPS) 2.5-inch NO)? Pro Disk Network ships Toshiba drop-in replacements and equivalent modern parts from US inventory. Every alternate below is in-stock today with same-day shipping for orders placed before 2pm ET. If your unit is still under warranty, contact our engineering team — we offer cross-shipping for B2B customers on Net 30 terms.
About the MK4055GSX
| SKU | MK4055GSX |
|---|---|
| Product | MK4055GSX - Toshiba 400GB 5400RPM 8MB Cache SATA 3GB/s (SATA 3GBPS) 2.5-inch NO |
| Current price | $273.91 |
| Stock status | In Stock |
| Detail page | View MK4055GSX › |
Drop-in replacements for MK4055GSX
Each part below is currently in our US warehouse, ships same-day for orders before 2pm ET, and includes our 90-day warranty. SKUs link to the full product page with photos, datasheets and B2B quote form.
HDD2H22 - Toshiba 400GB 5400RPM 8MB Cache SATA 3GB/s (SATA 3GBPS) 2.5-inch NOTE
SKU: HDD2H22
Price: $293.49
HDD2H22B - Toshiba 400GB 5400RPM SATA (SATA-II) 3GB/s 8MB Cache Super Slimline 9.5mm 2.5-Inch Notebook Hard Disk Drive
SKU: HDD2H22B
Price: $302.09
HDD2H22C - Toshiba 400GB 5400RPM SATA (SATA-II) 3GB/s 8MB Cache Super Slimline 9.5mm 2.5-Inch Notebook Hard Disk Drive
SKU: HDD2H22C
Price: $302.09
HDD2H22D - Toshiba 400GB 5400RPM SATA (SATA-II) 3GB/s 8MB Cache Super Slimline 9.5mm 2.5-Inch Notebook Hard Disk Drive
SKU: HDD2H22D
Price: $302.09
HDD2H22F - Toshiba 400GB 5400RPM SATA (SATA-II) 3GB/s 8MB Cache Super Slimline 9.5mm 2.5-Inch Notebook Hard Disk Drive
SKU: HDD2H22F
Price: $302.09
HDD2H22H - Toshiba 400GB 5400RPM SATA (SATA-II) 3GB/s 8MB Cache Super Slimline 9.5mm 2.5-Inch Notebook Hard Disk Drive
SKU: HDD2H22H
Price: $302.09
HDD2H22S - Toshiba 400GB 5400RPM SATA (SATA-II) 3GB/s 8MB Cache Super Slimline 9.5mm 2.5-Inch Notebook Hard Disk Drive
SKU: HDD2H22S
Price: $302.09
HDD2H22Z - Toshiba 400GB 5400RPM SATA (SATA-II) 3GB/s 8MB Cache Super Slimline 9.5mm 2.5-Inch Notebook Hard Disk Drive
SKU: HDD2H22Z
Price: $302.09
HDD2H22A - Toshiba 400GB 5400RPM SATA (SATA-II) 3GB/s 8MB Cache Super Slimline 9.5mm 2.5-Inch Notebook Hard Disk Drive
SKU: HDD2H22A
Price: $404.92
MK4058GSX - Toshiba 400GB 5400RPM 8MB Cache SATA 3GB/s 2.5-inch Laptop Hard Drive
SKU: MK4058GSX
Price: $192.32
HDD2H41F - Toshiba 400GB 5400RPM SATA 3GB/s 8MB Cache 2.5-inch Hard Disk Drive
SKU: HDD2H41F
Price: $259.50
HDD2H41A - Toshiba 400GB 5400RPM SATA 3GB/s 8MB Cache 2.5-inch Hard Disk Drive
SKU: HDD2H41A
Price: $259.50
How we pick replacements
Every recommendation above was selected using these criteria:
- Drop-in compatibility — same form factor (2.5"/3.5", PCIe slot, SFP port, etc.), so it fits the original chassis without modification
- Equivalent or better performance — matched on RPM/IOPS/speed/throughput, never downgraded
- Same-brand-preferred — we list the OEM-equivalent first when available, then trusted aftermarket
- Warranty coverage — 90-day Pro Disk warranty on every part, with 1-year option for B2B
- In stock today — never recommend a part that is on backorder
Need help confirming compatibility?
Our engineers validate every replacement against your specific server, switch, or chassis model before shipment. Email sales@prodisknetwork.com with your platform model (e.g., Dell PowerEdge R740, HP DL380 Gen10, Cisco Catalyst 9300) and we will confirm the exact part number that drops into your hardware.