Hi, everyone We have one qemu image file which size is 2348439044096, format is qcow2. But as we get its information with the command qemu-img info, the disk size is 139G. The info is as below:
# qemu-img info APCD-CSSJK image: APCD-CSSJK file format: qcow2 virtual size: 1.9T (2097152000000 bytes) disk size: 139G cluster_size: 2097152 backing file: /vms/storage/APCD-JHSJK_base_0 # qemu-img info APCD-JHSJK_base_0 image: APCD-JHSJK_base_0 file format: qcow2 virtual size: 1.0T (1101004800000 bytes) disk size: 34G cluster_size: 2097152 # ls -al APCD-JHSJK_base_0 -rw-r--r-- 1 root root 36012294144 Aug 9 00:31 APCD-JHSJK_base_0 root@HZ-CAS01-CVK01: /vms/storage# ls -al APCD-CSSJK -rw------- 1 root root 2348439044096 Aug 19 17:36 APCD-CSSJK As calculated with the image size, so the information of the disk size display may be wrong: (2348439044096 - 2*1024*1024*1024*1024) /( 1024*1024*1024) = 139.154296875 G As we convert the APCD-CSSJK with -O qcow2, the destination image is larger then 500G, which is larger than 139G + 36G; and we stop the converting. qemu-img convert -O qcow2 APCD-CSSJK apcd_csscssjk-gzh # ls -al apcd* ;date -rw-r--r-- 1 root root 483043311616 Aug 19 20:01 apcd_csscssjk-gzh Tue Aug 19 20:01:34 CST 2014 # qemu-img info apcd_csscssjk-gzh image: apcd_csscssjk-gzh file format: qcow2 virtual size: 1.9T (2097152000000 bytes) disk size: 469G cluster_size: 2097152 Is the disk size segment is limited to 2T in qemu? Or there are some patch for it. ------------------------------------------------------------------------------------------------------------------------------------- ???????????????????????????????????????? ???????????????????????????????????????? ???????????????????????????????????????? ??? This e-mail and its attachments contain confidential information from H3C, which is intended only for the person or entity whose address is listed above. Any use of the information contained herein in any way (including, but not limited to, total or partial disclosure, reproduction, or dissemination) by persons other than the intended recipient(s) is prohibited. If you receive this e-mail in error, please notify the sender by phone or email immediately and delete it!
