Create an image file

This is an example of creating an image file whose block size is 1MB and total size is 5GB.

# dd if=/dev/zero of=./disk1.img bs=1M count=5120
5120+0 records in
5120+0 records out
5368709120 bytes (5.4 GB) copied, 222.903 s, 24.1 MB/s
cs

Attach the image file as a loopback device

# losetup -f /app/work/glusterfs/disk/disk1.img
# losetup -l
NAME       SIZELIMIT OFFSET AUTOCLEAR RO BACK-FILE
/dev/loop0         0      0         0  0 /app/work/glusterfs/disk/disk1.img
cs

Format

# mkfs.xfs /dev/loop0
meta-data=/dev/loop0             isize=512    agcount=4, agsize=327680 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0, sparse=0
data     =                       bsize=4096   blocks=1310720, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal log           bsize=4096   blocks=2560, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
cs

Mount

# mkdir /mnt/disk1
# mount /dev/loop0 /mnt/disk1
cs

Unmount & Detach

# umount /mnt/disk1
# losetup -d /dev/loop0
cs

저작자표시 비영리 변경금지 (새창열림)