I am experimenting with KVM and I wish to create a virtual machine
image in a logical volume. I can create the new lv without problem
but when I go to format its file system then I get these warnings:
Warning: WARNING: the kernel failed to re-read the partition table
on /dev/sda (Device or resource busy). As a result, it may not
reflect all of your changes until after reboot.
Warning: Unable to open /dev/sr0 read-write (Read-only file system).
/dev/sr0 has been opened read-only.
When I take a look at things using parted I see this:
# parted -l print
Model: ATA WDC WD5000AAKS-0 (scsi)
Disk /dev/sda: 500GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Number Start End Size Type File system Flags
1 1049kB 525MB 524MB primary ext4 boot
2 525MB 500GB 500GB primary lvm
Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/vg_inet02-lv_guest01: 129GB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number Start End Size File system Flags
1 0.00B 129GB 129GB ext4
Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/vg_inet02-lv_log: 1049MB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number Start End Size File system Flags
1 0.00B 1049MB 1049MB ext4
Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/vg_inet02-lv_tmp: 8389MB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number Start End Size File system Flags
1 0.00B 8389MB 8389MB ext4
Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/vg_inet02-lv_home: 4194MB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number Start End Size File system Flags
1 0.00B 4194MB 4194MB ext4
Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/vg_inet02-lv_swap: 8321MB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number Start End Size File system Flags
1 0.00B 8321MB 8321MB linux-swap(v1)
Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/vg_inet02-lv_root: 53.7GB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number Start End Size File system Flags
1 0.00B 53.7GB 53.7GB ext4
Warning: Unable to open /dev/sr0 read-write (Read-only file system).
/dev/sr0
has been opened read-only.
Error: /dev/sr0: unrecognised disk label
The host system is CentOS-6.0 with updates applied. I did a manual
disc configuration on initial install but I do not recall
specifically dealing with /dev/sr0 at any point.
Can anyone explain to me what is happening here and what I should
do? Am I constrained to reboot the server each time that I make
changes to an LV? Is there some configuration change I need make to
the base system?
The favour of a direct copy of any reply to the mailing list is
requested as I am a digest subscriber.
--
*** E-Mail is NOT a SECURE channel ***
James B. Byrne mailto:ByrneJB@xxxxxxxxxxxxx
Harte & Lyne Limited http://www.harte-lyne.ca
9 Brockley Drive vox: +1 905 561 1241
Hamilton, Ontario fax: +1 905 561 0757
Canada L8E 3C3
_______________________________________________
CentOS mailing list
CentOS@xxxxxxxxxx
http://lists.centos.org/mailman/listinfo/centos
