IBM Stretch Storage Subsytem

1961
IBM Stretch Storage Subsystem

First fault tolerant storage subsystem, 40 bit parallel transfer, used 7 bit error correcting code (ECC) to correct failures.
This type of fault tolerance is later called RAID 2.

Why it's important
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Discussion:
The IBM Stretch Storage Subsystem consisted of the IBM 7612 Disk Synchronizer, 354 Disk Control Unit & 353 Disk File.


Additional Information
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