https://community.hpe.com/t5/disk-enclosures/how-to-figure-out-the-lun-number-of-an-xp-disk-from-xpinfo/m-p/3657184#M18231 Nelson, you are on the right way. Beyond this value, the "x" in cxtydz will be increased. The correct formula is "bit-based".<BR /><BR />Here are 2 links regarding this, perhaps you already know:<BR /><BR /><A href="http://us-support3.external.hp.com/iv/data/documents/DE_SW_UX_swrec_EN_01_E/Fibre" target="_blank">http://us-support3.external.hp.com/iv/data/documents/DE_SW_UX_swrec_EN_01_E/Fibre</A><BR />Channel.pdf<BR /><BR /><A href="http://www.hp.com/hpbooks/prentice/chapters/0130102229.pdf" target="_blank">http://www.hp.com/hpbooks/prentice/chapters/0130102229.pdf</A> Tue, 25 Oct 2005 12:52:41 GMT Torsten. 2005-10-25T12:52:41Z https://community.hpe.com/t5/disk-enclosures/how-to-figure-out-the-lun-number-of-an-xp-disk-from-xpinfo/m-p/3657181#M18228 If a disk/lun is reported by xpinfo say:<BR /><BR />target 0f<BR />lun 02<BR /><BR />what will be its LUN Number as assigned in CV?<BR /> Tue, 25 Oct 2005 11:31:32 GMT https://community.hpe.com/t5/disk-enclosures/how-to-figure-out-the-lun-number-of-an-xp-disk-from-xpinfo/m-p/3657181#M18228 Alzhy 2005-10-25T11:31:32Z https://community.hpe.com/t5/disk-enclosures/how-to-figure-out-the-lun-number-of-an-xp-disk-from-xpinfo/m-p/3657182#M18229 Finally figured it out:<BR /><BR />Target f (dec 15) x 8 = 120 + Lun 2 = LUN 122<BR /><BR />LUN 122 is target f lun 2.<BR /><BR />Every 8 LUNs effect an increase in the target value.<BR /><BR /> Tue, 25 Oct 2005 11:41:53 GMT https://community.hpe.com/t5/disk-enclosures/how-to-figure-out-the-lun-number-of-an-xp-disk-from-xpinfo/m-p/3657182#M18229 Alzhy 2005-10-25T11:41:53Z https://community.hpe.com/t5/disk-enclosures/how-to-figure-out-the-lun-number-of-an-xp-disk-from-xpinfo/m-p/3657183#M18230 Hmmm not quite:<BR /><BR />The following is supposed to be LUN 1023<BR /><BR /># xpinfo -f /dev/rdsk/c140t15d6<BR /><BR />Device File : /dev/rdsk/c140t15d6 Model : XP???<BR /> Port : CL1A Serial # : 00030015<BR /> Target : 0f Code Rev : 5001<BR /> LUN : 06 Subsystem : 0004<BR /> CU:LDev : 00:20 CT Group : ---<BR /> Type : OPEN-V CA Volume : SMPL<BR /> Size : 100 MB BC0 (MU#0) : SMPL<BR /> ALPA : 00 BC1 (MU#1) : SMPL<BR /> Loop Id : 7e BC2 (MU#2) : SMPL<BR /> SCSI Id : --- RAID Level : RAID1<BR /> FC-LUN : 0000753f00000020 RAID Group : 2-1<BR /> Port WWN : 60060e8004753f00 ACP Pair : 2<BR /> Disk Mechs : --- --- --- ---<BR /><BR /><BR />If the formula as I assumed is true, then target should be 127 Dec or 7F Hex. But xpinfo shows target as 0f.<BR /><BR />Any ideas of a fool proof formula?<BR /><BR /> Tue, 25 Oct 2005 12:04:09 GMT https://community.hpe.com/t5/disk-enclosures/how-to-figure-out-the-lun-number-of-an-xp-disk-from-xpinfo/m-p/3657183#M18230 Alzhy 2005-10-25T12:04:09Z https://community.hpe.com/t5/disk-enclosures/how-to-figure-out-the-lun-number-of-an-xp-disk-from-xpinfo/m-p/3657184#M18231 Nelson, you are on the right way. Beyond this value, the "x" in cxtydz will be increased. The correct formula is "bit-based".<BR /><BR />Here are 2 links regarding this, perhaps you already know:<BR /><BR /><A href="http://us-support3.external.hp.com/iv/data/documents/DE_SW_UX_swrec_EN_01_E/Fibre" target="_blank">http://us-support3.external.hp.com/iv/data/documents/DE_SW_UX_swrec_EN_01_E/Fibre</A><BR />Channel.pdf<BR /><BR /><A href="http://www.hp.com/hpbooks/prentice/chapters/0130102229.pdf" target="_blank">http://www.hp.com/hpbooks/prentice/chapters/0130102229.pdf</A> Tue, 25 Oct 2005 12:52:41 GMT https://community.hpe.com/t5/disk-enclosures/how-to-figure-out-the-lun-number-of-an-xp-disk-from-xpinfo/m-p/3657184#M18231 Torsten. 2005-10-25T12:52:41Z