Deleted time segments is [1023500000, 1260000000), which is until just before O3GK.
Because NDS serves minute trend data via minute_raw files instead of minute frames and a direct access to frame files is restricted for end users, site activities aren't affected by this work.
(In this meaning, minute frames can be removed from the Kamioka storage except recent several days for SummaryPages and so on.)
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Minute frames before 1300000000 were already moved from KAGRA System-B to the ICRR computer system (see also [kagra07982]). So I compared the files between on the Kamioka storage and on the ICRR computer system and removed files on the Kamioka storage which can be found on the ICRR computer system. Some files and directories cannot be found on ICRR computer system. These files are still kept on the Kamioka storage. Removed and kept directories can be found in the attached files.
Missing files on ICRR computer system might be caused by the DAQ trouble on the k1fw1-hyades1 stream. I checked and removed files in this time on the k1fw0-hyades0 stream. On the other hand, the primary stream was (is?) k1fw1-hyades1 stream for a long time. So files existing only on the k1fw0 might not be sent to Kashiwa. I don't think these files has important information. (It's hard to know what kind of data for the too old and not in the observing period data. And also, trend data can be reproduced from raw frames with tough works if they are really needed.) But I will keep them for a while just in case.
