OPERATIONAL DEFECT DATABASE
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"SDS device header is unavailable" CloudLink alarm Device is listed in CloudLink center as Unencrypted Encrypted Mapper is missing following a node reboot
When a PowerFlex device is encrypted by CloudLink, the new encryption mapper should be added to PowerFlex. eg. /dev/mapper/svm_sdX for CloudLink 7.1.1 and earlier eg. /dev/mapper/svm_wwn-XXXX for CloudLink 7.1.2 and later If the user adds the raw device by mistake (eg. /dev/sdX), the CloudLink encryption header will be erased and the drive will appear as "Unencrypted" in CloudLink Center and the following alarm will occur "SDS device header is unavailable" The encryption mapper will be available only until the next node reboot. If the user tries to correct by removing the raw device from PowerFlex and adding the encryption header, there will be data loss if the node is rebooted because the encryption mapper will not survive a reboot in this state. Example: Raw device /dev/sdb added to PowerFLex instead of /dev/mapper/svm_sdb Mapper /dev/mapper/svm_sdb is listed in CloudLink Center as Unencrypted:
To correct the CloudLink header on the drive perform the following steps for each effected node, one node at a time. Remove all the errored drives from PowerFlex for the node (both raw devices and encrypted mappers) Put the node in maintenance mode in PowerFlex Reboot the node (This will remove the old encryption mapper, and clear the alarm) Exit maintenance mode Encrypt the Unencrypted devices to create new encryption mappers Ensure the devices are listed as Encrypted in CloudLink Center Ensure the "SDS device header is unavailable" CloudLink alarm is no longer present on the node Add the encrypted mappers to PowerFlex Ensure the devices are listed as Encrypted in CloudLink Center Ensure the "SDS device header is unavailable" CloudLink alarm is not present on the node.
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