R/Evolution 2000 Series, Troubleshooting Manual

Page: 111 / 130

Chapter 7 Troubleshooting and Replacing FRUs 111
Failover causes a virtual disk to
become critical when one of its
drives “disappears.”
• In general, controller failover is not supported if a disk drive is
in a drive enclosure that is connected with only one cable to the
controller enclosure. This is because access to the drive
enclosure will be lost if the controller to which it is connected
fails. When the controller with the direct connection to the drive
enclosure comes back online, access to the drive enclosure
drives is restored. To avoid this problem, ensure that two cables
are used to connect the enclosures as shown in the
Getting
Started Guide
, and that the cables are connected securely and
are not damaged.
• If the problem persists or affects a disk drive in a controller
enclosure, a hardware problem might have occurred in the drive
module, dongle, midplane, or controller module. Identify and
replace the FRU where the problem occurred
A virtual disk is much smaller
than it should be. Verify that the disk drives are all the same size within the virtual
disk. The virtual disk is limited by the smallest sized disk.
Volumes in the virtual disk are
not visible to the host. Verify that the volumes are mapped to the host using RAIDar:
Manage > Volume Management > Volume Mapping > Map Hosts
to Volume.
Virtual Disk Degraded
Event codes 58 and 1, or event
codes 8 and 1 • Replace the failed disk drive and add the replaced drive as a
spare to the critical virtual disk.
• If you have dynamic spares enabled, you only need to replace
the drive. The system will automatically reconstruct the virtual
disk.
Virtual Disk Failure
Event codes 58 and 3, or event
codes 8 and 3 Replace the bad disk drive and restore the data from backup.
Virtual Disk Quarantined
Event code 172 Ensure that all drives are turned on.
When the vdisk is de-quarantined, event code 79 is returned.
Spare Disk Failure
Event code 62 • Replace the disk.
• If this disk was a dedicated spare for a vdisk, assign another
spare to the vdisk.
Spare Disk Unusable
Event code 78 • The disk might not have a great enough capacity for the vdisk.
• Replace the spare with a disk that has a capacity equal to or
greater than the smallest disk in the vdisk.
Table 7-6 Virtual Disk Faults (Continued)
Problem Solution