PRIMECLUSTER Global File Services Configuration and Administration Guide 4.7

G.2.13 Incompatibilities from 4.6A20

There are some incompatibilities with the following functions compared to 4.6A20.

Table G.13 Incompatibilities from 4.6A20

Number	Item
1	[RHEL8] Loop back mount disabled
2	[RHEL9] Loop back mount enabled

Note

• When the OS before upgrading is RHEL7 and after upgrading is RHEL8, an incompatibility of the number 1 occurs.

• When the OS before upgrading is RHEL8 and after upgrading is RHEL9, an incompatibility of the number 2 occurs.

G.2.13.1 [RHEL8] Loop back mount disabled

Incompatibility description

Operation when mounting an image file (such as iso) located on the GFS Shared File System as a loop device by mount(8) with the -o loop option has been changed.

Before change: Mount terminates normally.

After change: Mount terminates abnormally with the following message:

mount: mountpoint wrong fs type, bad option, bad superblock on /dev/loop0, missing codepage or helper program, or other error.

Corrective action

Copy the image file to a file system other than the GFS Shared File System, and then mount the file.

G.2.13.2 [RHEL9] Loop back mount enabled

Incompatibility description

Operation when mounting an image file (such as iso) located on the GFS Shared File System as a loop device by mount(8) with the -o loop option has been changed.

Before change: Mount terminates abnormally with the following message:

mount: mountpoint wrong fs type, bad option, bad superblock on /dev/loop0, missing codepage or helper program, or other error.

After change: Mount terminates normally.

Corrective action

None.