Replacement for TD91S011: Drop-In Alternatives We Stock
Looking for a replacement for the TD91S011 (TD91S011 - Quantum Atlas III 9.1GB 7200RPM Ultra SCSI 50-Pin 1MB Cache 3.5-inch Hard Drive)? Pro Disk Network ships 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 TD91S011
| SKU | TD91S011 |
|---|---|
| Product | TD91S011 - Quantum Atlas III 9.1GB 7200RPM Ultra SCSI 50-Pin 1MB Cache 3.5-inch Hard Drive |
| Current price | $861.12 |
| Stock status | In Stock |
| Detail page | View TD91S011 › |
Drop-in replacements for TD91S011
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.
989000-R - Adaptec AHA-2940 Ultra SCSI Controller - 20MBps - 1 x 50-pin HD-50 Ultra SCSI - SCSI External 1 x 50-pin IDC Ultra SCSI - SCSI Internal
SKU: 989000-R
Price: $155.99
1822200 - Adaptec 19160 SCSI Controller Card - 160MBps - 1 x 50-pin Ultra SCSI - SCSI External 1 x 68-pin - SCSI Internal 1 x 50-pin Ultra SCSI - SC
SKU: 1822200
Price: $1,227.42
AHA2940ULTRAKIT - Adaptec 2940 Ultra Host Adapter - Up to 20MBps - 1 x 50-pin HD Ultra SCSI - SCSI External 1 x 50-pin Ultra SCSI - SCSI Internal
SKU: AHA2940ULTRAKIT
Price: $109.09
0776MW - Dell / Quantum Atlas IV 4.5S4.5GB 4500RPM Ultr3 SCSI 3.5-inch Hard Drive with Tray
SKU: 0776MW
Price: $282.20
776MW - Dell / Quantum Atlas IV 4.5S4.5GB 4500RPM Ultr3 SCSI 3.5-inch Hard Drive with Tray
SKU: 776MW
Price: $282.20
8E036J0 - Maxtor Atlas 36.7GB 15000RPM 8MB Cache 80-Pin Ultra-320 SCSI 3.5-inch Low Profile (1.0inch) Hard Drive
SKU: 8E036J0
Price: $47.37
8K036J002535E - Maxtor Atlas 15K II 36.7GB 15000RPM Ultra-320 SCSI 80-Pin 8MB Cache 3.5-inch Hard Drive
SKU: 8K036J002535E
Price: $147.86
8C036J0 - Maxtor Atlas 36GB 15000RPM 8MB Cache 80-Pin Ultra-320 SCSI Hot-Pluggable 3.5-inch Low Profile (1.0inch) Hard Drive
SKU: 8C036J0
Price: $161.11
8E036J002535E - Maxtor Atlas 15K II 36.7GB 15000RPM Ultra-320 SCSI 80-Pin 8MB Cache 3.5-inch Hard Drive
SKU: 8E036J002535E
Price: $163.41
8E073J0 - Maxtor Atlas-II 73.5GB 15000RPM 8MB Cache 80-Pin 3.5-inch Ultra-320 SCSI Hard Drive
SKU: 8E073J0
Price: $165.79
8C018J002095E - Maxtor Atlas 15K 18.4GB 15000RPM Ultra-320 SCSI 80-Pin 8MB Cache 3.5-inch Hard Drive
SKU: 8C018J002095E
Price: $182.93
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.