This is the original BF25A011 version
2550AT

Form: 5.25 inch
Capacity: 2.550 GB
Seek time: 11.0 ms
Controller: IDE / ATA2 FAST/ENHA
Cache/Buffer: 128 KB ADAP./SEGMEN
Data transfer rate:
5.000 MB/S int
16.600 MB/S ext PIO4
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