DR Series DR4300 - DR Series System Administrator's Guide

In general, the DR Series system enters the Maintenance mode whenever the file system has encountered an issue that prevents it from operating normally.

NOTE: You can use the Reason code information available in the Maintenance mode to contact Technical Support. All maintenance must be conducted using the DR Series systems Command Line Interface.

When in its Maintenance mode, the filesystem is in a read-only state, and the system runs the following maintenance-based operations:

NOTE: Whenever the DR Series systems enters or exits from the Maintenance mode state, all communication via protocols is lost.

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Runs an internal filesystem check.

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Generates a filesystem status report (if the filesystem check finds no issues, the DR Series system switches back to Operational mode without user intervention).

If the filesystem check finds issues, you can choose to make repairs (using Confirm Repair Filesystem) or ignore the detected issue (using Skip Repair Filesystem), at which point the system switches back to Operational mode.

The Maintenance mode process displays a number of stages, indicated on the Maintenance Mode progress bar, which include:

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Preparing for Filesystem Check

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Scan in Progress

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Completed Generating Report

NOTE: If the Filesystem Check detects any repairable files, it generates a Repair Report that identifies these reported files. The Maintenance Mode progress bar halts at the Completed Generating Repair stage, and remains in Maintenance mode until you click Confirm Repair Filesystem. The DR Series system does not advance to the Switching to Operation Mode stage until the filesystem repair is completed.

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Switching to Operational Mode

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Operational Mode (Normal State)

The Maintenance Mode page provides the following information:

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Maintenance Mode Progress bar:

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Displays the five stages of Maintenance mode

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Updates the progress bar as each stage completes

NOTE: If an alert displays above the Maintenance Mode progress bar, this indicates that the filesystem check has completed, and it has generated a report on the repairable files (which are displayed in the Repair Report pane under the Maintenance Mode progress bar). To repair all of the reported files listed in the Repair Report, you must click Confirm Repair Filesystem.

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Repair Report:

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Displays a list of repairable filesystem files that were detected in the Filesystem Check.

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Identifies the repairable files by Container ID, File/Inode/Directory location, and a brief reason for failure.

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Provides a search capability that allows you to click prev or next to display the previous or next page in the Repair Report, or lets you display a specific page number of the Repair Report by entering this number in the Goto page and click go.

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System Information pane:

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NOTE: When in Maintenance mode, the DR Series system navigation panel displays the following options that are links to display the correspond page in the DR Series system GUI:

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After the DR Series system enters Maintenance mode, there can only be two possible outcome states:

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Operational mode (Normal State): where the filesystem check was successful, and no system files need to be repaired (Filesystem Check: successful).

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Maintenance mode has halted: where the filesystem check detected one or more repairable files (Filesystem Check: unsuccessful).

Filesystem Check — Successful: when the Maintenance mode successfully completes all of its stages, the DR Series system displays its status as having entered Operational mode (Normal State). Only after the Maintenance mode has successfully completed its internal check can it return to an Operational mode.

To return to the Operational mode, click Go to Dashboard on the Maintenance Mode page options bar. Go to Dashboard is only active when all of the internal system checks have completed and the progress bar indicates that all stages have been completed.

NOTE: You may encounter issues when using data management agents (DMAs) such as NetBackup with expired backup images when the DR Series system is in its Maintenance mode.

NOTE: When in Maintenance mode, image expiration fails because the DR Series system is in a read-only state. If this occurs, the DMA assumes that the backup images have expired. However, the DR Series system administrator may be unaware that the backup data images still reside on the DR Series system.

Filesystem Check — Unsuccessful: when the Maintenance mode halts at the Completed Generating Report stage, this indicates that the filesystem check detected some repairable files, and listed them in the Repair Report pane on the Maintenance Mode page.

To return to the Operational mode, click Confirm Repair Filesystem on the Maintenance Mode page options bar to repair the files listed in the Repair Report. Confirm Repair Filesystem is the only active option you can select when the progress bar indicates that some filesystem files are in need of repair.

Parent topic

Supported Ports in a DR Series System

The following table lists the application and service ports found on a normally operating DR Series system. There may be other ports that are not listed here, that an administrator may need to open and enable to support specific operations across the network. Be aware that the ports listed in the following table may not reflect your specific network environment, or any planned deployment. While some of these DR Series system ports may not need to be accessible through the firewall, this information is made available when deploying the DR Series system in your own network because it indicates supported ports that may need to be exposed.

Table 4. Supported DR Series System Ports
Port Type	Number	Port Usage or Description
DR Series System Application Ports
TCP	20	File Transfer Protocol (FTP)—for transferring files.
TCP	23	Telnet—remote terminal access protocol for unencrypted text communications.
TCP	80	Hypertext Transfer Protocol (HTTP)—unencrypted protocol communications.
TCP	443	HTTPS—combination of the HTTP with Secure Socket Layer (SSL)/Transport Layer Security (TLS).
TCP	1311	Hardware Health Monitor (Note: this is not used on the DR2000v)
TCP	9901	Watcher
TCP	9904	Configuration Server (needed for replication operations)
TCP	9911	Filesystem Server (needed for replication operations)
TCP	9915	MetaData Replication (needed for replication operations)
TCP	9916	Data Filesystem Server (needed for replication operations)
TCP	9918	Diagnostics Collector
TCP	9920	Data path used for OST or RDS replications
TCP	10011	Control channel (needed for OST or RDS operations)
TCP	11000	Data channel (needed for OST or RDS operations)
DR Series System Service Ports
TCP	22	Secure Shell (SSH)—used for secure logins, file transfers like SCP (Secure Copy) and SFTP (Secure File Transfer Protocol)
TCP	25	Simple Mail Transfer Protocol (SMTP)—used for routing and sending email
TCP	139	SMB daemon—used for SMB protocol-related processes
TCP	199	SNMP daemon—used by Simple Network Management Protocol (SNMP) requests
TCP	801	NFS status daemon

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