DataVault

The DataVault was <a href="/facts/Thinking_Machines/RFW6Ijwz">Thinking Machines</a>' <a href="/facts/Mass_storage/p4DHVtbY">mass storage</a> system, storing 5 GB of data, expandable to 10 GB with transfer rates of 40 MB/s. Eight DataVaults could be operated in parallel for a combined data transfer rate of 320 MB/s for up to 80 GB of data.
Each DataVault unit stored its data in an array of 39 individual <a href="/facts/Disk_drive/hnsXRb5X">disk drives</a> with data spread across the drives. Each <a href="/facts/64-bit/AgvkQHkM">64-bit</a> data chunk received from the <a href="/facts/I%2fO_bus/R45TKwS7">I/O bus</a> was split into two <a href="/facts/32-bit/TDMVce8s">32-bit</a> <a href="/facts/Word_(computer_architecture)/2e5umRaj">words</a>. After verifying <a href="/facts/Parity_bit/peFp3Wau">parity</a>, the DataVault controller added 7 bits of <a href="/facts/Error_Correcting_Code/cLUTUJrA">Error Correcting Code</a> (ECC) and stored the resulting 39 bits on 39 individual drives. Subsequent failure of any one of the 39 drives would not impair reading of the data, since the ECC code allows any single-bit error to be detected and corrected.
Although operation is possible with a single failed drive, three spare drives were available to replace failed units until they are repaired. The ECC codes permit 100% recovery of the data on any one failed disk, allowing a new copy of this data to be reconstructed and written onto the replacement disk. Once this recovery is complete, the data base is considered to be healed.
In today's terminology this would be labeled a <a href="/facts/Standard_RAID_levels/StvCqldY">RAID-2</a> subsystem. However, these units shipped before the label <a href="/facts/RAID/IpzWWgog">RAID</a> was formed.
The DataVault was an example of unusual industrial design. Instead of the usual rectilinear box, the cabinet had a gentle curve that made it look like an information desk or a bartender's station.

DataVault open-in-new

DataVault