[Bug 195033] New: [cam] [scsi] [patch] unclean SCSI attached HDD power-off on shut down

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=195033

            Bug ID: 195033
           Summary: [cam] [scsi] [patch] unclean SCSI attached HDD
                    power-off on shut down
           Product: Base System
           Version: 10.0-STABLE
          Hardware: Any
                OS: Any
            Status: Needs Triage
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: sneakywumpus at gmail.com

Created attachment 149433
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=149433&action=edit
Patch to spin down scsi attached disks upon power down

Shutting down my system with ATA hard drives connected to several mps(4) LSI
host
bus adapters causes the SMART Power-Off_Retract_Count attribute to increase
indicating an unclean power down. Attached is a patch to spin down the discs
upon shutdown based on the code in cam/ata/ata_da.c and r203420/r214279. I'm
running
with this patch for over a year now and it works as intended on my system
(Supermicro
X9SCM-F with 3 IBM M1015 HBA's flashed with LSI 9210-8i IT firmware and
20 WD SE SATA drives). The patch also fixes a few variable formatting issues in
da(4).

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