3Ware 9550SXU-12 User Guide - Page 230
If the unit Type is Disk, Single Disk, or Spare, the VPort Virtual
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3DM 2 Reference Serial #. The serial number of the unit. This number is assigned by the firmware when the unit is created. Capacity. The total capacity of the unit (capacities of subunits are not shown). Type. The type of unit or subunit. RAID 0, RAID 1, RAID 5, RAID 6, RAID 10, RAID 50, Single Disk, Spare, or Disk. Stripe. The stripe size of the unit, if applicable. Parities. The number of parity drives in the RAID unit. Volumes. Displays the number of volumes in a unit. This is usually 1. If you created a boot volume on this unit, or if you have a unit on which you have enabled the auto-carving policy, you will see the number of volumes into which the unit has been divided. For more information, see "Using AutoCarving for Multi LUN Support" on page 92. Subunits. If the unit has subunits, details of the subunits are shown. Note: If an asterisk (*) appears next to the status of a subunit, there is an error on one of the drives in the subunit. This feature provides a diagnostic capability for potential problem drives. The error may not be a repeated error, and may be caused by an ECC error, SMART failure, or a device error. Rescanning the controller will clear the drive error status if the condition no longer exists. VPort #. If the unit Type is Disk, Single Disk, or Spare, the VPort (Virtual Port) to which the drive is connected is shown. For multiple-drive units, the VPort numbers are shown in the subunits section. The VPort number is a link to the Drive Information page. 218 3ware SAS/SATA RAID Software User Guide, Version 9.5.1