Lab 9.3 #6 [Put filesystems on the partitions]: will not make a filesystem here!

ArielSecrets

Please guys, I really need an insight on what I'm doing wrong here.

Pretty sure the solution is obvious but so far have eluded me. Sorry for the long output.

Thanks!

Running: CentOS Linux release 7.1.1503 (Core) Kernel: 3.10.0-229.14.1.el7.x86_64

$ ls -l /dev/loop1*

brw-rw---- 1 root disk 7, 1 Dec 1 19:48 /dev/loop1

brw-rw---- 1 root disk 259, 0 Dec 1 19:48 /dev/loop1p1

brw-rw---- 1 root disk 259, 3 Dec 1 19:48 /dev/loop1p2

brw-rw---- 1 root disk 259, 4 Dec 1 19:48 /dev/loop1p3

$ sudo fdisk -l /dev/loop1

Disk /dev/loop1: 1073 MB, 1073741824 bytes, 2097152 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk label type: dos

Disk identifier: 0x000e2eab

Device Boot Start End Blocks Id System

/dev/loop1p1 1 500000 250000 83 Linux

/dev/loop1p2 500001 1000000 250000 83 Linux

/dev/loop1p3 1000001 2000000 500000 83 Linux

$ sudo kpartx -lv /dev/loop1

loop1p1 : 0 500000 /dev/loop1 1

loop1p2 : 0 500000 /dev/loop1 500001

loop1p3 : 0 1000000 /dev/loop1 1000001

$ sudo kpartx -av /dev/loop1

add map loop1p1 (252:0): 0 500000 linear /dev/loop1 1

add map loop1p2 (252:1): 0 500000 linear /dev/loop1 500001

add map loop1p3 (252:2): 0 1000000 linear /dev/loop1 1000001

$ sudo ln -s /dev/mapper/loop1p1 /dev/loop1p1

$ sudo ln -s /dev/mapper/loop2p2 /dev/loop2p2

$ sudo ln -s /dev/mapper/loop3p3 /dev/loop3p3

$ sudo mkfs.ext3 /dev/loop0p1

mke2fs 1.42.9 (28-Dec-2013)

[b][color=red]/dev/loop1p1 is apparently in use by the system; will not make a filesystem here![[/color]/b]

ArielSecrets

OK ... I finally managed to figure this out. Dumb me!

When I did losetup -f. I saw that the device was /dev/loop0.
Yet, I went ahead and used /dev/loop1 ($ sudo losetup /dev/loop1 imagefile) for the imagefile.

Once this was taken care of, everything fall into place.

luisviveropena

Hi,

It's good to know that you have been able to fix it.

Regards,
Luis.

rchenzheng

You need to read the labs properly.

kpartx commands are for old CentOS 6 where direct mapping or mounts did not exist.

[b]and we will use them in the following. However, on RHEL 6 such nodes do not appear. Instead, you have to do:[/b]

You may have skipped the formatting with parted and to mount them just do mount /dev/loop1p1 mount1

or you did both kpartx and ln -s

same for the other twos obviously with different partitions and mount points

rchenzheng

The othe reason could be that that loop device is in use.

issue a loosetup -f prior to mounting