It is managed disk which multiple nodes share.

Within a cluster, the application may be store the data on shared disk when it is equipped.

MCCS manages the Unmount / Mount of the disk and monitors it is read/writable state. MCCS attach the shared disk to the only node to prevent file system corruption.

Table of Contents

Adding

Add the shared disk resource.
Before adding the shared disk resource, be make sure that the driver letter should be located in the external shared storage.

When add a resource from a group name, select a group → right click → "Add Resource". Or select "Edit(E)" from the main menu bar → select "Add Resource". Or select "Add Resource" icon from the tool bar.
Select "SharedDisk" from Resource Type lists and click the "Next" button. When add a resource from the shared disk resource type name, this step will be skipped.
Enter the resource name. Enter the file system type, volume device file location and mount point or click the
to browse these informations.

[Figure] Finish Button Active after Entering All the Data
As Additional Settings, mount command, forced to unmount and filesystem check options are available and click the "OK" button.

[Figure] Additional setting view
Click the "Finish" button to add the shared disk resource.

Deleting

Select "Resource type" →- right click → delete resource.

State

The following table explains the state of shared disk resource.

Shared disk agent: Manages shared disks registered for MCCS.

State	Agent command	Decription	Note

State	Agent command	Decription
Online The volume is unlocked and is accessible.	Offline	It unmounts the shared disk. The disk cannot accessible from the node.
Online The volume is unlocked and is accessible.	Monitoring	It checks whether the volume is mounted and temp text file are created to monitor whether the disk is available.
Offline The volume is locked and is not accessible to read/write.	Online	It mounts the shared disk. The disk can accessible from the node.
	Monitoring	It checks whether the volume is mounted and temp text file are created to monitor whether the disk is available.
Fault The disk is unavailable due to errors caused by external factors or failure while it is online.	Online	It mounts the shared disk. The disk can accessible from the node.
	Offline	It unmounts the shared disk. The disk cannot accessible from the node.

Attribute

Shows the specified attribute of shared disk resource.

Attribute	Description	Type	Default	Edit	Note
ChkDskTimeout	It is timeout limit to complete or stop the check disk of the shared disk before attaching it . If value is '0', MCCS waits to complete the check disk before attaching it.	INTEGER	0	O
DevPath	Defines absolute path of device that will be mount.	STRING		O
DoFsck	If set to true, fsck will be performed when the shared disk is brought online.	BOOLEAN	false	O
FileSystem	Defines file system type of the shared disk.	STRING		O
ForceUnmount	If it is set to true, the shared disk will be forcefully unmounted when it is taken offline even tough it has been used.	BOOLEAN	false	O
FsckOpt	Specify command option for file system check command	STRING	-a	O
HostID	Unique server id for SCSI reservation	STRING		X
IOTest	Checks I/O status of a disk if it is set as true	BOOLEAN	true	O
MountOpt	Defines mount options	STRING		O
MountPoint	Defines absolute path for the mounting location.	DIRECTORY		O
RegType	Register type of SCSI device	STRING		X
UseSCSILOCK	If it's set to true, Use SCSI reservation	BOOLEAN	false	O
UUID	It's UUID of target disk. For example '00c0ffd79655000050042c4f01000000'. It will be set by automatically when you set proper letter.	STRING		X
VendorType	Vender type of SCSI device	STRING		X

7-5 Shared Disk

Adding

Deleting

State

Attribute