Dell PowerVault MD3420 - Manual (Page 234)

• A critical MEL event indicating the presence of a miswire condition
• A “Needs Attention” condition
• A Recovery Action indicating the miswire
In addition, the RAID controller module reports “Redundancy Loss” information for the physical disks,
EMMs, and enclosures for which it has only one access path due to the miswire (for example the bottom
two enclosures in a storage array). The Redundancy Loss information is not unique to SAS topologies.
Following are the event notifications related to SAS port miswire:
• SAS miswire detected
• HBA connected to physical disk channel
• Physical disk channels cross wired
For miswire conditions where the RAID controller module disables one or more SAS ports to protect the
integrity of the SAS domain, take these steps to recover from the condition:
1. Determine which cable is in the wrong place and remove it. If the last action taken was to install a
new cable, this is the most likely candidate. If not, look for cables attached to devices that are not
part of the storage array or cables attached between channels. The recovery event should report the
channel on which the miswire was detected, and possibly the enclosure.
2. After you remove a cable or move the cable to the correct location, run the recover sasPort miswire
command. The RAID controller module attempts to re-enable any SAS ports that were disabled
when the miswire was detected.
3. If the cable that you removed or moved to correct for the miswire provided the RAID controller
module its only access to the disabled port, the RAID controller module is not able to re-enable the
SAS port that was disabled. To complete the recovery, must power cycle the enclosures in the
storage array.
Re-Create Remote Replication Repository Virtual Disk
Description
NOTE: This command is valid only with Fibre Channel storage arrays.
This command creates a new Remote Replication repository virtual disk (also called a replication
repository virtual disk) by using the parameters defined for a previous replication repository virtual disk.
The underlying requirement is that you have previously created a replication repository virtual disk. When
using this command, the replication repository virtual disk can be defined in one of three ways:
• User-defined physical disks
• User-defined disk group
• User-defined number of physical disks
If you choose to define a number of physical disks, the RAID controller module firmware chooses which
physical disks to use for the replication repository virtual disk.
Syntax
User-Defined Physical Disks
recreate storageArray replicationRepository
repositoryRAIDLevel=(1 | 5 | 6)
repositoryPhysicalDisks=(enclosureID1,slotID1... enclosureIDn,slotIDn)
repositoryDiskGroupUserLabel=[diskGroupName]
[enclosureLossProtect=(TRUE | FALSE)]
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