The KaVA observations are basically limited to record with 1024 Mbps=1 Gbps data rate. To response 1 Gbps recording, VERA and KVN have a DIR-2000 and Mark5B recording system, respectively. DIR-2000 is a high speed magnetic tape recorder, and Mark5B is a hard disk recording system eveloped at Haystack observatory. Their total bandwidths are 256 MHz because of 2-bit sampling. The recording time per roll of tape are 80 mins in the DIR-2000 system. In the case of the Mark5B system, the recording time depends on data size of disk-pack(e.g. 4TB,8TB,16TB,24TB).