Date: Thu, 11 Aug 2016 07:47:30 +0000 From: Hongjiang Zhang <honzhan@microsoft.com> To: "freebsd-scsi@freebsd.org" <freebsd-scsi@freebsd.org> Subject: How to ask XPT/CAM to ignore invalid LUN devices Message-ID: <SN2PR03MB222414B20DF47AD33A6E4BB1B51E0@SN2PR03MB2224.namprd03.prod.outlook.com>
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Hi all, I'm developing the SCSI storage driver for FreeBSD on Hyper-V. During lun scan, if the specified lun does not have a device, the Hyper-V host responses the FreeBSD VM with INQURY data: "0x3f 0x0 0x5 0x2 0x0 ...". The "0x3f" has already indicates FreeBSD VM that the device on this lun is offline, but why there are so many /dev/passXX were created? root@hz_BSD11:/usr/home/honzhan/clovetrail_freebsd # camcontrol devlist <Msft Virtual CD/ROM 1.0> at scbus0 target 0 lun 0 (cd0,pass0) <Msft Virtual Disk 1.0> at scbus1 target 0 lun 0 (pass1,da0) < > at scbus1 target 1 lun 1 (pass2) <Msft Virtual Disk 1.0> at scbus2 target 0 lun 0 (pass131,da1) < > at scbus2 target 0 lun 1 (pass3) < > at scbus2 target 0 lun 2 (pass5) < > at scbus2 target 0 lun 3 (pass7) < > at scbus2 target 0 lun 4 (pass9) < > at scbus2 target 0 lun 5 (pass11) < > at scbus2 target 0 lun 6 (pass13) < > at scbus2 target 0 lun 7 (pass15) < > at scbus2 target 0 lun 8 (pass17) <Msft Virtual Disk 1.0> at scbus2 target 0 lun 9 (pass19) < > at scbus2 target 0 lun a (pass21) < > at scbus2 target 0 lun b (pass23) < > at scbus2 target 0 lun c (pass25) < > at scbus2 target 0 lun d (pass27) ...... Thanks Hongjiang Zhang
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