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- Install MCCS on both nodes
- Set group
- Add shared disk resource
- Enable shared disk resource and check offline on both nodes
- Add SCSI Lock resource (Select new drive letter, not from the one in shared disk resource)
- Enable SCSI Lock resource and check Key in resource attribute in MCCS Console
- Change PrType 1 to 3 for attribute of SCSI Lock resource. (When SCSI Lock resource is added, make sure that SCSI Lock Disk Letter are disappeared from Windows Explorer of both servers.)
- Configure dependency of resources (SCSI Lock resource must go online first)
- Test failover from node2 to 1
- Test failover from node1 to 2
- Customer applications that use the volume setting
Adding
There are two way to add a resource which one is select this from a group name and another is select this from a resource type.
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스카시 예약 응용 리소스를 그룹에 추가합니다.
스카시 예약 리소스 구성전에, SCSI3지원 스토리지를 통해 볼륨을 사전에 구성 해야 합니다.
- Select a group → right click → 'Add Resource'.
[Figure] Adding Resource in a group - Select 'ServiceSCSILock' from Resource Type lists and click 'Next' button.
[Figure] Select Resource Wizard View - Next steps are same as adding in resource type.
Adding in Resource Type
- ResourceType → Right Click → Click Add Resource
[Figure] Adding Resource in a resource type
Getting disk information.
[Figure] Screen of Getting disk information.
DriveLetter to be used for SCSILock can be selected.
[Figure] Selecting driver letter View
When there is no disk for SCSI Lock resource, "Disk Not Found" message appears.
[Figure] Disk Not Found - Enter resource name. If you skip enter resource name, this will be given 'SLock_value' which value is selected driver letter.
[Figure] Selecting driver letter View
Click 'Finish' and SCSI Lock resource is added.
[Figure] Adding SCSI Lock resource is completed그림] 스카시예약 리소스 추가 화면 - 완료 버튼을 클릭하면 스카시 예약 리소스가 추가 되며,
관리 웹 콘솔 상에서 바로 확인이 가능합니다.
Deleting
Select resource type → right click → delete resource.
Select "Delete Resource".
[Figure] Delete SCSI Lock resource view
삭제된 리소스는 관리 웹콘솔 상에서 바로 사라집니다.
Status
The following table explains the status switching of the MCCS resource caused by a user's command and the status.
The command assumes that it is generated by a user.
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Status | Agent command | Description | Note |
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Online Disk key is exclusively reserved at an online node. | Offline | It switches to offline while maintaining the reservation. | |
Monitoring | Check if there is a reservation made on the disk. | ||
Offline 1. Disk is reserved but the resource is still offline. | Online | Register a key for a disk reservation and wait for a response from the other node. | |
Monitoring | Check if there is a reservation made on the disk. | ||
Trouble It occurs when a reservation is stolen while going online. | Online | Register a key for a disk reservation and wait for a response from the other node. | |
Offline | It switches to offline while maintaining the reservation. |
Attribute
[Figure] SCSI Lock Resource Attribute view
SCSI Lock resource provides the following detailed attributes as well.
Setting are available in "Resource Unique Attribute" in resource's attribute tab.
Each attribute value has the following meanings:
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스카시 예약 리소스의 고유 속성을 표시 합니다.
Attribute | Description | Type | Default | Edit | Note |
DiskDUID | DUID(Device Unique ID, 16 byte as Hex value) of disk is used as identifier. Specify DUID of reserve disk. | STRING | X | ||
DriveLetter | Disk to be used for reservation is specified by drive letter. | STRING | X | ||
Key | MAC address is used as Reserved-Key. This key is automatically set by agent. | STRING | |||
PreemptWaitCount | Time waiting for permission of other node before reservation | INTEGER | 2 times | O | |
PrType | This attribute decides on how to give the permission of reserve disk access as Persist Type specified in SCSI3-PR spec. | INTEGER | Prtype=1 | O |
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