Description
IBM 90X8526 44MB 5.25" Full Height MFM Hard Drive 0665 14336 Bad Sectors
The IBM 90X8526 is a 44MB full-height 5.25-inch MFM (Modified Frequency Modulation) hard drive, part of IBM's 0665 drive family. This unit has 14336 bad sectors documented on the defect map label affixed to the top of the drive and is being sold AS-IS for parts or repair. It is not guaranteed functional.
Specifications & What's Included
- Manufacturer: IBM
- Part Number: 90X8526
- Model Family: IBM 0665
- Capacity: 44 MB
- Form Factor: 5.25-inch Full Height (FH)
- Interface: MFM (Modified Frequency Modulation)
- Bad Sectors: 14336 (per factory defect map label on drive)
- Controller PCB: Integrated, visible on underside of drive
- Connectors: MFM data edge connector, power connector (Molex 4-pin)
- Included: Drive only — no cables, no mounting hardware
Applications
The IBM 0665 series MFM hard drives were used in IBM PC XT and PC AT systems as well as compatible personal computers during the mid-to-late 1980s. MFM was the dominant hard drive interface standard of the era before IDE/ATA and ESDI gained widespread adoption, connecting via a dedicated MFM controller card in the system's ISA expansion bus. Today, drives like this are sought by collectors and restorers working on period-correct vintage IBM PC hardware, as well as technicians needing a parts source for controller boards, platters, or heads. The full-height 5.25-inch form factor places this drive firmly in the early-to-mid 1980s generation of PC storage.
This IBM 90X8526 44MB 5.25-inch full-height MFM hard drive (model 0665) has 14336 bad sectors, as documented on the defect map label affixed to the top of the drive. It is being sold AS-IS for parts or repair only and is not guaranteed functional. The drive body is physically intact with normal aging and handling wear typical of vintage full-height 5.25-inch hard drives; the MFM data connector, power connector, and controller PCB are all present. Please view our photo set and contact us if you have any questions.
Warranty Information
Additional Information
Brand: |
IBM |
Model: |
90X8526 |
MPN: |
90X8526 |
Secondary Model: |
0665 |
SKU: |
7960 |
Type: |
MFM Hard Drive |
Capacity: |
44 MB |
Form Factor: |
5.25" Full Height |
Interface: |
MFM (Modified Frequency Modulation) |
Bad Sectors: |
14336 |
Compatible With: |
IBM PC XT, PC AT, and compatible MFM systems |
Country/Region of Manufacture: |
United States |
Seller Notes: |
Drive only — no cables or mounting hardware included. |
Condition Notes: |
This IBM 90X8526 44MB 5.25" MFM hard drive (0665) has 14336 bad sectors per its defect map label. Sold AS-IS for parts or repair only — not guaranteed functional. Drive only, no cables. |
California Prop 65 Warning: |
WARNING: This product can expose you to chemicals including lead and lead compounds, and DEHP (a phthalate), which are known to the State of California to cause cancer and birth defects or other reproductive harm. Go to P65Warnings.ca.gov |