Well, it seems that these drives were registered in a MPIO storage cluster with multiple initiators.
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It looks like you need to edit your /etc/sysconfig/scsi_reserve first thing to gain the access to the drive with a valid key
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Linux OS Service ‘scsi_reserve’ – The Geek Diary
The scsi_reserve service allows you to use SCSI reservations as a fence method. An SCSI reservation restricts access to a device such that only registered nodes can access it. During system startup, the scsi_reserve script performs this registration using a unique key, based on the node's IP...
www.thegeekdiary.com
Note any 3rdparty application program, script or command that scans/probes a device(s) which has a scsi2 reservation exclusively set will produce a"reservation conflict" error. Commands like vgscan, lvscan, fdisk, sfdisk,`vxdctl enable` are typicall commands that will scan/probe a device(s).
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