Step 9 Save the device configuration settings by entering the copy running-config startup-config EXEC command. Performing Disk Maintenance for RAID-1 Systems WAAS supports hot-swap functionality for both failed disk replacement and scheduled disk maintenance. When a disk fails, WAAS automatically detects the disk failure, marks the disk as bad, and removes the disk from the RAID-1 volume. To schedule disk maintenance, you must manually shut down the disk. You must wait for the disk to be completely shut down before you physically remove the disk from the WAE. When the RAID removal process is complete, WAAS generates a disk failure alarm and trap. In addition, a syslog ERROR message is logged. Note If the removal event (such as, a disk failure or software shutdown) occurs while the RAID array is in the rebuild process, the RAID removal process may take up to 1 minute to complete. The duration of this process depends on the size of the disk. If the WAAS software removes a failed disk during the RAID rebuild process, a RAID rebuild failure alarm is generated. If you administratively shut down the disk during the RAID rebuild process, a RAID rebuild abort alarm is generated instead. When you install a replacement disk, the WAAS software detects the replacement disk and performs compatibility checks on the disk, initializes the disk by creating partitions, and adds the disk to the software RAID to start the RAID rebuild process. If the newly inserted disk has the same disk ID as a disk that was previously marked bad in the same physical slot, then the disk will not be mounted, and the post-replacement checks, initialization, and RAID rebuilding will not occur. A newly installed disk must be of the same type and speed as the old disk and it must meet the following compatibility requirements:
16-25 Cisco Wide Area Application Services Configuration Guide OL-26579-01 Chapter 16 Maintaining Your WAAS System Replacing Disks in RAID-5 Systems • If the replacement disk is for disk00, disk02, or disk04 of a RAID pair, the replacement disk must be the same size as the running disk in the array. • If the replacement disk is for disk01, disk03, or disk05 of a RAID pair, then the replacement disk must have the same or greater RAID capacity as the running disk in the array. Compatibility checks, which are part of the hot-swap process, check for capacity compatibility. Incompatibility generates an alarm and aborts the hot-swap process. To perform disk maintenance, follow these steps: Step 1 Manually shut down the disk. a. Enter global configuration mode and then enter the disk disk-name diskxx shutdown command: WAE# configure WAE(config)# disk disk-name diskxx shutdown b. Wait for the disk to be completely shut down before you physically remove the disk from the WAE.
You've reached the end of your free preview.
Want to read all 594 pages?
- Fall '09
- I don't remember
- Transmission Control Protocol, Cisco Wide Area, wide area application, Area Application Services