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DR Series Software 4.0.4 - Command Line Reference Guide

Introduction to the DR Series System Command Line Reference Guide Introducing the DR Series system Managing the DR Series system
Alerts Commands Authenticate Commands Network
Network Command Usage network --show network --delete network --restart network --setdhcp network --setstatic_ip [--bondif <bondN>] [--nwif <ethN>] --ip <IPv4/IPv6 address not already in use> --netmask <netmask> [--gateway <IPv4/IPv6 address>] network --create_bond network --create_eth network --add_member network --setdns [--suffix <dns suffix>] [--primary <IPv4/IPv6 address>] [--secondary <IPv4/IPv6 address>] network --setbonding --bondif <bondN> [--mode <ALB | 802.3ad>] [--mtu <supported MTU range 512 - 9000>] network --update network --factory_reset network --host network --route network --nslookup --destination <ip address | hostname> network --traceroute --destination <ip address | hostname> network --ping --destination <ip address | hostname> [--tries <number>] [--size <number>] [--interface <bondN | ethN>] network --blink network --enable network --disable=GUID-925B2D94-D583-4966-ABDE-8E3FE14B59FC=1=en-us= network --troubleshoot [--links] [--gateway] [--ntp] [--dns] [--active_domain] [--nis] [--clients] [--port_mapper] [--network_config] [--show_active <NFS|CIFS|OST|RDS|NDMP|ISCSI|FC>] [--interface <bondN | ethN>] network --troubleshoot --gateway --interface <bondN | ethN> network --troubleshoot [--show_active <NFS| CIFS|OST|NDMP|ISCSI|RDS>] network --tcpdump [--port <nfs | windows | replication | ost | rds>] [--pkt_size <128 - 32768>] [--file_size <0 - 100>] [--stop] [--host <ip address list>] [--interface <bondN | ethN>] network --tcpdump [--pkt_size <128 - 32768>] network --tcpdump [--file_size <0 - 100>] network --tcpdump [--host <ip address list>] network --tcpdump [--port <nfs | windows | replication | ost | rds>] network --iperf_client --server <ip address | hostname> [--port <number>] [--window_size <num bytes [KB/MB]>] [--interval <num seconds>] [--time <num seconds>] network --iperf_server [--port <number>] [--window_size <num bytes [KB/MB>] network --help
OST RDA Stats Storage Group commands System
System Command Usage system --show [--config] system --show [--hardware] system --show [--storage] [--type <boot | internal | external>] [--service_tag <service tag>] system --show [--storage] system --show [--license] [--verbose] system --show [--ntp] system --show [--version] system --show [--timezones [Region]] system --show [--upgradefile] system --show [--upgradehistory] system --show [--marker] system --show [--replication_traffic] system --show [--opdup_traffic] system --show [--backup_traffic] system --show [--mgmt_traffic] system --init system --init --secure_erase <1–pass/3-passes/7-passes> system --reboot system --shutdown system --upgrade system --license [--validate] [--add] system --setname --name <node_name> system --setdate [--date <date>] [--timezone <Region/Zone>] system --setntp [--add <server name>] system --setntp [--delete <server name>] system --setntp [--enable] system --setntp [--disable] system --setntp [--adjust_time] system --hybrid_replication [--enable][--disable][--status] system --rdairgap [--enable][--disable][--set_retention_period <0 days to 365 days>][--get_retention_period][--open][--close][--status] system --rdairgap_schedule [--start_time <HH:MM>][--end_time <HH:MM>][--remove] system --setlogin system --telnet [--enable | --disable] system --datacheck --enable system --datacheck --disable system --datacheck --throttle system --marker [--enable] [--disable] system --verify_on_read [--enable] [--disable] system --add_storage --enclosure <service tag> system --storage [--set_usage_alert <70% - 90%>] system --storage [--blink] [--type <internal | external>] [--service_tag <service tag>] [--disk <slot num>] system --storage [--unblink] [--type <internal | external>] [--service_tag <service tag>] [--disk <slot num> system --mgmt_traffic system --backup_traffic system --replication_traffic system --opdup_traffic system --help
User Virtual Machine
Maintaining the DR Series System
Diagnostics Maintenance
Maintenance Command Usage maintenance --filesystem [--start_scan [verify_data | verify_rda_metadata | verify_metadata] [--storage_group <name>] maintenance --filesystem [--stop_scan] maintenance --filesystem [--scan_status] maintenance --filesystem [--scan_report [verbose]] maintenance --filesystem [--repair_status [verbose]] maintenance --filesystem [--repair_history [verbose]] maintenance --filesystem [--scan_restart [verify_data | verify_rda_metadata | verify_metadata]] maintenance --filesystem [--repair_now] maintenance --filesystem [--reclaim_space] maintenance --filesystem [--clear_quarantine] maintenance --filesystem [--clear_quarantine] maintenance --filesystem --show_throughput maintenance --configuration [--backup] maintenance --configuration [--restore] maintenance --configuration [--reinit_dictionary] maintenance --configuration [--reset_web_certificate] maintenance --configuration --enable_sha256_web_certificate maintenance --hardware [--reinit_nvram] maintenance --hardware [--restore_hw_db] maintenance --hardware [--motherboard_replaced] maintenance --disk [--make_standby [slot num]] [--type <internal | external-<num> | service tag>] --clear_foreign] maintenance --remote_access [--show] maintenance --remote_access [--enable] maintenance --remote_access [--racreset] maintenance --remote_access [--static_ip] [--ip <IPv4/IPv6 address>] [--netmask <netmask>] [--gateway <IPv4/IPv6 address>] [--device <lom1|lom2|lom3|lom4>] maintenance --remote access [--disable] maintenance --vdisk --check_consistency --type <boot|internal|external> [--service_tag <service tag>] maintenance --help
Managing DR Series System Storage Operations
System Storage Operation Commands Connection Container VTL NDMP iSCSI FC Replication Seed Schedule
Data Integrity Checking Additional Linux Commands About us

Data Integrity Checking

The DR Series system design includes an online data integrity verification feature known as Data Check, which checks for potential or unexpected data inconsistencies in the data store associated with the internal system deduplication engine. Data Check performs a series of checks for unexpected data inconsistencies as early as possible in the data ingest and backup process.

Data Check checks and verifies data both during the write process and also the data already stored on the system disks. The design purpose is to detect potential issues early enough in the data management process so that original data can be used to backup and correct any potential data inconsistencies. Data Check reports data verification issues, but it is not intended nor designed to repair these issues itself.

Any data inconsistencies that are encountered are reported as DR Series system alerts, and these filesystem errors can be repaired using the Maintenance mode (for more information, see Maintenance.

The Data Check feature runs continuously except for when the DR Series system enters its Maintenance mode (it does not run while the system is in this mode). Data Check leaves the system in an Operational mode when it detects an error, at which point, it sends an alert and an event.

If an alert has already been sent, but has not been cleared (for example, when repairs occur during the Maintenance mode), no new event is sent. Similarly, for events, one is sent for the first detected data inconsistency, and then the total number of issues detected during the scan are listed in a new event.

If Data Check is enabled, it runs in the background as a low-priority process, and changes to an idle state when the other major DR Series system operations (data ingest, replication, and cleaner) are active.

NOTE: Unless otherwise noted, all later references to datacheck or Data Check in this guide are used interchangeably to represent the Data Check feature in the DR Series system.

About Data Check

The purpose of the Data Check feature is to perform data integrity checks to detect potential silent data inconsistencies that can affect the DR Series system disks or disk subsystems, and protect user data before there is any potential data loss.

Silent data inconsistencies can be any of the following types of disk-based data storage issues: hardware imperfections, bit rot, current spikes, disk firmware problems, and ghost writes. Data Check performs its own integral data integrity checks that detect and identify potential issues after performing the following scans:

  • Priority write verify scans
  • Continuous data verification scans

For more information, see Continuous Data Verification Scans and Priority Write Verify Scans.

Priority Write Verify Scans

Data Check performs an early write verify scan, also known as a namespace scan, when files are first created or when they are modified by users. All of the modified files are flagged for priority scanning and this process is based on its timestamp—with a higher priority given to the most recently modified files. Early write verify scans are performed every five minutes when the other DR Series system operations are idle. For more information, see About Data Check and Continuous Data Verification Scans.

Continuous Data Verification Scans

Data Check performs a data verification scan, also known as a blockmap scan, which cycles every two hours through all of the objects in the data store. Data integrity verification is done by recalculating the hash values for the underlying data, and comparing these to the stored hash values using an additional checksum process. Any unexpected data inconsistencies are reported using the DR Series system alerts process.

For more information, see About Data Check and Priority Write Verify Scans.

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