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rodolico |
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$ date ; ./insert_space /media/rodolico/backup/testfile 1048576 ; date
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Wed Oct 9 00:08:50 CDT 2019
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%sizeof fstat.off_t is 8
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%Sought size is 107374182400
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%Adding head-end 1048576 bytes
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Wed Oct 9 01:43:41 CDT 2019
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virt 100G
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mem 31.4
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res 27.3G
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shr 27.3G
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cpu 2%
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iotop -o -p 29937
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19M/s in and out
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never touched swap, so did it within
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Wed Oct 9 00:08:50 CDT 2019
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fallocate -l 10G /media/rodolico/backup/testfile
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mkfs.ext4 -m0 -L testdisk /media/rodolico/backup/testfile
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mount -o loop /media/rodolico/backup/testfile /mnt
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rsync -av Downloads /mnt
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umount /mnt
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insert_space /media/rodolico/backup/testfile 1048576
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fdisk /media/rodolico/backup/testfile
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# create first partition at offset 2048, which is 1M assuming 512 byte sectors
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# partition is 82? Linux ext
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save
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kpartx -lv /media/rodolico/backup/testfile
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kpartx -av /media/rodolico/backup/testfile
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mount /dev/mapper/testfilep1 /mnt
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# should be no files copied on following command
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rsync -av Downloads /mnt
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man 3 getopt
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would actually be more flexible if it is assumed the space was already added to the end of the file. The program would move from 0 to filesize-extendsize. In this way, a device like a zfs volume or a lv could be used, simply by appending the correct space to the end, then calling this.
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question? How does gpartd do it. it moves partitions.
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