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Maintenance Commands | nhwdtd(1M)

- NAME
- SYNOPSIS
- DESCRIPTION
- OPTIONS
- ATTRIBUTES
- SEE ALSO

## NAME

> nhwdtd - Watchdog Timer daemon

## SYNOPSIS

> `/opt/SUNWcgha/sbin/nhwdtd [ -u URL ]`

## DESCRIPTION

> The `nhwdtd` daemon implements the Watchdog Timer service.

> The `nhwdtd` daemon monitors the hardware watchdog on the nodes of the cluster, at the lights-off management (LOM) level. If you are using CompactPCI servers, do not use the Watchdog Timer service provided by the Foundation Services. The CompactPCI hardware watchdogs operate at the OpenBoot PROM level and are monitored by the platform's software.

> On hardware watchdogs that operate at the LOM level, the `nhwdtd` daemon monitors a node for operating system hang, but does not monitor the boot process.

> The `nhwdtd` daemon can be configured differently on each node depending on your requirements. For information on how to configure the `nhwdtd` daemon, see the `nhfs.conf`(4) man page.

> The `nhwdtd` daemon is monitored by the `nhpmd` daemon. If the `nhwdtd` fails, it is relaunched three times. If the `nhwdtd` daemon fails a third time, the node is rebooted.

> The `nhwdtd` daemon operates at a lower priority than the `nhpmd` daemon, but at a higher priority than the other Foundation Services daemons.

## OPTIONS

> The -u option enables you to specify the URL of the `nhfs.conf` file. For example:

> >     % /opt/SUNWcgha/sbin/nhwdtd -u file:///etc/opt/SUNWcgha/nhfs.conf

> The URL `file:///etc/opt/SUNWcgha/nhfs.conf` is the default value.

## ATTRIBUTES

> See `attributes`(5) for descriptions of the following attributes:

> ATTRIBUTE TYPE | ATTRIBUTE VALUE
> --- | ---
> Architecture | SPARC
> Availability | SUNWnhwdt
> Interface Stability | Evolving

## SEE ALSO

> `nhpmd`(1M), `nhfs.conf`(4)

Netra HAS FS 2.1 | Go To Top | Last Changed September 2004

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