Replacement for 21P5253: Drop-In Alternatives We Stock
Looking for a replacement for the 21P5253 (21P5253 - IBM RAID Controller Ultra2 with Battery and Cache 3.3v PCI)? Pro Disk Network ships IBM 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 21P5253
| SKU | 21P5253 |
|---|---|
| Product | 21P5253 - IBM RAID Controller Ultra2 with Battery and Cache 3.3v PCI |
| Current price | $155.64 |
| Stock status | In Stock |
| Detail page | View 21P5253 › |
Drop-in replacements for 21P5253
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.
39R8794 - IBM ServeRAID 6i+ Zero Channel Ultra320 SCSI RAID Controller - PCI-X - RAID Supported - 1 5 10 50 1E 1E0 00 5EE RAID Level - 128 MB
SKU: 39R8794
Price: $318.32
04N2261 - IBM Ultra-2 PCI Express 26MB Cache RAID Controller with Battery for AS/400 iSeries Server
SKU: 04N2261
Price: $147.37
34L3819 - IBM SSA 4-Port RAID Controller PCI Advance Serial RAID with 64MB for RS/6000
SKU: 34L3819
Price: $107.54
46M0830 - IBM ServeRAID M5025 8-port SAS RAID Controller - Serial Attached SCSI (SAS) Serial ATA/600 - PCI Express 2.0 x8 - Plug-in Card - RAID Suppo
SKU: 46M0830
Price: $732.43
39J5554 - IBM RAID Controller Cache Battery for IBM 2780, 5580, 5708, 5780
SKU: 39J5554
Price: $344.33
97P4846 - IBM RAID Controller Cache Battery for IBM 2780, 5580, 5708, 5780
SKU: 97P4846
Price: $344.33
46M0851 - IBM ServeRAID M5015 PCI-Express 2.0 X8 SAS SATA RAID Controller with Battery
SKU: 46M0851
Price: $96.84
49Y3719 - IBM ServeRAID M5015 PCI-Express 2.0 X8 SAS/SATA RAID Controller with Battery
SKU: 49Y3719
Price: $212.63
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.