Specifications

3-286
Cisco Wide Area Application Services Command Reference
OL-11817-01
Chapter 3 CLI Commands
(config) disk
(config) disk
To configure how disk errors are handled and to define a disk error-handling threshold on a WAAS
device, use the disk global configuration command. Use the no form of this command to return to the
default error-handling threshold.
disk error-handling {reload | remap | threshold number}
Syntax Description
Defaults error-handling threshold number: 10
Command Modes global configuration
Device Modes application-accelerator
central-manager
Usage Guidelines If you have a two-drive system, the RAID software protects the SYSFS from single-drive failures and
prevents applications from seeing I/O errors. With this configuration, error handling need not be
specified. For all other configurations, error handling should be specified.
To operate properly, the WAAS device must have a disk drive named disk00. The WAAS device must
also contain a disk drive that contains the first SYSFS (system file system) partition. The SYSFS
partition is used to store log files, including system logs and internal debugging logs. It may also be used
to store image files and configuration files on a WAAS device. Disk00 always contains the SYSFS
partition. When software RAID is applied, the SYSFS partitions are contained on both disk00 and
disk01. In either case, the disk00 disk and the disk that contains the first SYSFS partition are called
critical drives and are required for proper operation of the WAAS device.
When a WAE is booted and a critical disk drive is not detected at system startup time, the WAAS device
runs at a degraded state. If one of the critical disk drives becomes inoperable at run time, the WAAS
device can exhibit symptoms such as the applications malfunctioning or failing, or the WAAS device can
stop responding. You must monitor the critical disk drives on a WAAS device and report any disk drive
errors to Cisco TAC.
error-handling Configures disk error handling.
reload Reloads the disk if the system file system (SYSFS) on disk00 has problems.
remap Sets the disk to attempt to remap disk errors automatically.
threshold Sets the number of disk errors allowed before the disk is marked as bad.
number Number of disk errors allowed before the disk is marked as bad (0–100).
The default is 10. A value of zero indicates that the disk should never be
marked bad.