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| Displaying extended device attributes | ||
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Device Discovery Layer (DDL) extended attributes are attributes or flags corresponding to a VxVM or DMP LUN or Disk and which are discovered by DDL. These attributes identify a LUN to a specific hardware category.
The list of categories includes:
Each LUN can have one or more of these extended attributes. DDL discovers the extended attributes during device discovery from the array support library (ASL) . If Veritas Operations Manager (VOM) is present, DDL can also obtain extended attributes from the VOM Management Server for hosts that are configured as managed hosts.
The vxdisk -p list command displays DDL extended attributes. For example, the following command shows attributes of "std", "fc", and "RAID_5" for this LUN:
# vxdisk -p list DISK : tagmastore-usp0_0e18 DISKID : 1253585985.692.rx2600h11 VID : HITACHI UDID : HITACHI%5FOPEN-V%5F02742%5F0E18 REVISION : 5001 PID : OPEN-V PHYS_CTLR_NAME : 0/4/1/1.0x50060e8005274246 LUN_SNO_ORDER : 411 LUN_SERIAL_NO : 0E18 LIBNAME : libvxhdsusp.sl HARDWARE_MIRROR: no DMP_DEVICE : tagmastore-usp0_0e18 DDL_THIN_DISK : thick DDL_DEVICE_ATTR: std fc RAID_5 CAB_SERIAL_NO : 02742 ATYPE : A/A ARRAY_VOLUME_ID: 0E18 ARRAY_PORT_PWWN: 50:06:0e:80:05:27:42:46 ANAME : TagmaStore-USP TRANSPORT : FC
The vxdisk -x attribute -p list command displays the one-line listing for the property list and the attributes. The following example shows two Hitachi LUNs that support Thin Reclamation via the attribute hdprclm:
# vxdisk -x DDL_DEVICE_ATTR -p list DEVICE DDL_DEVICE_ATTR tagmastore-usp0_0a7a std fc RAID_5 tagmastore-usp0_065a hdprclm fc tagmastore-usp0_065b hdprclm fc
User can specify multiple -x options in the same command to display multiple entries. For example:
# vxdisk -x DDL_DEVICE_ATTR -x VID -p list
DEVICE VID DDL_DEVICE_ATTR tagmastore-usp0_0a7a HITACHI std fc RAID_5 tagmastore-usp0_0a7b HITACHI std fc RAID_5 tagmastore-usp0_0a78 HITACHI std fc RAID_5 tagmastore-usp0_0a79 HITACHI std fc RAID_5 tagmastore-usp0_065a HITACHI hdprclm fc tagmastore-usp0_065b HITACHI hdprclm fc tagmastore-usp0_065c HITACHI hdprclm fc tagmastore-usp0_065d HITACHI hdprclm fc
Use the vxdisk -e list command to show the DLL_DEVICE_ATTR property in the last column named ATTR.
# vxdisk -e list DEVICE TYPE DISK GROUP STATUS OS_NATIVE_NAME ATTR tagmastore-usp0_0a7a auto - - online c10t0d2 std fc RAID_5 tagmastore-usp0_0a7b auto - - online c10t0d3 std fc RAID_5 tagmastore-usp0_0a78 auto - - online c10t0d0 std fc RAID_5 tagmastore-usp0_0655 auto - - online c13t2d7 hdprclm fc tagmastore-usp0_0656 auto - - online c13t3d0 hdprclm fc tagmastore-usp0_0657 auto - - online c13t3d1 hdprclm fc
For a list of ASLs that supports Extended Attributes, and descriptions of these attributes, refer to the hardware compatibility list (HCL) at the following URL: