Help Center/ MapReduce Service/ User Guide/ MRS Cluster O&M/ MRS Cluster Alarm Handling Reference/ ALM-12063 Unavailable Disk
Updated on 2024-09-23 GMT+08:00
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ALM-12063 Unavailable Disk

Description

The system checks whether the data disk of the current host is available at the top of each hour. The system creates files, writes files, and deletes files in the mount directory of the disk. If the operations fail, the alarm is generated. If the operations succeed, the disk is available, and the alarm is cleared.

Attribute

Alarm ID

Alarm Severity

Auto Clear

12063

Major

Yes

Parameters

Parameter

Description

Source

Specifies the cluster or system for which the alarm is generated.

ServiceName

Specifies the name of the service for which the alarm is generated.

RoleName

Specifies the role for which the alarm is generated.

HostName

Specifies the host for which the alarm is generated.

DiskName

Specifies the disk for which the alarm is generated.

Impact on the System

Service failure: If you need to modify or use data on a disk that is unwritable or unreadable, the job may fail.

Possible Causes

  • The permission of the disk mount directory is abnormal.
  • There are disk bad sectors.

Procedure

Check whether the permission of the disk mount directory is normal.

  1. In the alarm list on FusionInsight Manager, locate the row that contains the alarm, and view the IP address of the host and DiskName for the disk for which the alarm is generated.
  2. Log in to the host where the alarm is generated as user root.
  3. Run the df -h |grep DiskName command to obtain the mount point and check whether the permission of the mount directory is unwritable or unreadable.

    • If it is, go to 4.
    • If it is not, go to 8.

      If the permission of the mount directory is 000 or the owner is root, the mount directory is unreadable and unwritable.

  1. Modify the directory permission.
  2. One hour later, check whether this alarm is cleared.

    • If it is, no further action is required.
    • If it is not, go to 6.

  3. Contact hardware engineers to rectify the disk.
  4. One hour later, check whether this alarm is cleared.

    • If it is, no further action is required.
    • If it is not, go to 8.

Collect fault information.

  1. On FusionInsight Manager, choose O&M > Log > Download.
  2. Select NodeAgent from the Service and click OK.
  3. Click in the upper right corner, and set Start Date and End Date for log collection to 10 minutes ahead of and after the alarm generation time, respectively. Then, click Download.
  4. Contact the O&M personnel and send the collected log information.

Alarm Clearing

After the fault is rectified, the system automatically clears this alarm.

Related Information

None