Data transfer system having a channel adapter with varying data

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Details

36492692, 36492795, 36492797, 364927, 364 99, 364929, 3649353, 36493544, 36493554, 3649393, 3649521, 364968, G06F 1312

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050238299

ABSTRACT:
A data transfer system to transfer variable-length data from a channel unit to a peripheral storing medium in which a channel adapter and a storing medium control unit are disposed between a channel unit and a data storing medium. These components are linked by means of a signal transmission path. The channel unit transmits a data signal and a command signal including an instruction designating a storage of the data and information specifying a length of the data to the storing medium control unit. On receiving the command signal from the channel unit, the storing medium control unit supplies the information specifying the length of the data in the command signal to a count unit of the channel adapter. The information is then set to the count unit of the channel adapter. When the setting operation is completed, the channel adapter requests the channel unit for the data, which causes the data having the length of the data thus set to be transferred from the channel unit (to the channel adapter), thereby temporarily storing the data transferred. The storing medium control unit reads out the data stored in the channel adapter and temporarily stores the data so as to transfer the data to the data storing medium.

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Lynch et al., "Serial Channel to I/O Interface", IBM Technical Disclosure Bulletin, vol. 19, No. 8, pp. 3139-3143, (Jan. 1977).
"IBM System/360 and System/370 I/O Interface Channel to Control Unit Original Equipment Manufacture's Information", (Feb. 1988).

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