插入坏盘，出现kernel panic ，机器重启

ncist2011

fmadm faulty
--------------- ------------------------------------  -------------- ---------
TIME            EVENT-ID                              MSG-ID         SEVERITY
--------------- ------------------------------------  -------------- ---------
Jul 23 17:37:40 a0ff99fb-6559-4704-a568-b7fac440689e  SUNOS-8000-KL  Major     

Host        : ua3500d-spb
Platform    : To-be-filled-by-O.E.M.    Chassis_id  : To-be-filled-by-O.E.M.
Product_sn  :

Fault class : defect.sunos.kernel.panic
Affects     : sw:///:path=/var/crash/unknown/.a0ff99fb-6559-4704-a568-b7fac440689e
                  faulted but still in service
Problem in  : sw:///:path=/var/crash/unknown/.a0ff99fb-6559-4704-a568-b7fac440689e
                  faulted but still in service

Description : The system has rebooted after a kernel panic.  Refer to
              illumos.org/msg/SUNOS-8000-KL for more information.

Response    : The failed system image was dumped to the dump device.  If
              savecore is enabled (see dumpadm(1M)) a copy of the dump will be
              written to the savecore directory /var/crash/unknown.

Impact      : There may be some performance impact while the panic is copied to
              the savecore directory.  Disk space usage by panics can be
              substantial.

Action      : If savecore is not enabled then please take steps to preserve the
              crash image.
              Use 'fmdump -Vp -u a0ff99fb-6559-4704-a568-b7fac440689e' to view
              more panic detail.  Please refer to the knowledge article for
              additional information.


fmdump -Vp -u a0ff99fb-6559-4704-a568-b7fac440689e
TIME                           UUID                                 SUNW-MSG-ID
Jul 23 2015 17:37:40.517975000 a0ff99fb-6559-4704-a568-b7fac440689e SUNOS-8000-KL

  TIME                 CLASS                                 ENA
  Jul 23 17:37:37.4312 ireport.os.sunos.panic.dump_available 0x0000000000000000
  Jul 23 17:37:23.5240 ireport.os.sunos.panic.dump_pending_on_device 0x0000000000000000

nvlist version: 0
        version = 0x0
        class = list.suspect
        uuid = a0ff99fb-6559-4704-a568-b7fac440689e
        code = SUNOS-8000-KL
        diag-time = 1437644260 429058
        de = fmd:///module/software-diagnosis
        fault-list-sz = 0x1
        fault-list = (array of embedded nvlists)
        (start fault-list[0])
        nvlist version: 0
                version = 0x0
                class = defect.sunos.kernel.panic
                certainty = 0x64
                asru = sw:///:path=/var/crash/unknown/.a0ff99fb-6559-4704-a568-b7fac440689e
                resource = sw:///:path=/var/crash/unknown/.a0ff99fb-6559-4704-a568-b7fac440689e
                savecore-succcess = 1
                dump-dir = /var/crash/unknown
                dump-files = vmdump.0
                os-instance-uuid = a0ff99fb-6559-4704-a568-b7fac440689e
                panicstr = assertion failed: SD_PM_IS_LEVEL_VALID(un, un->un_power_level), file: ../../common/io/scsi/targets/sd.c, line: 20703
                panicstack = genunix:process_type+17bb00 () | sd:sd_start_stop_unit_task+166 () | genunix:taskq_thread+318 () | unix:thread_start+8 () |
                crashtime = 1437644172
                panic-time = Thu Jul 23 17:36:12 2015 CST
        (end fault-list[0])

        fault-status = 0x1
        severity = Major
        __ttl = 0x1
        __tod = 0x55b0b5e4 0x1edfabd8




/var/adm/message
Jul 23 17:33:11 ua3500d-spb stmfproxy[101300]: [ID 757727 daemon.warning] socket() call failed: 9
Jul 23 17:33:44 ua3500d-spb scsi: [ID 107833 kern.notice] /pci@0,0/pci8086,3721@3/pci10b5,8648@0/pci10b5,8648@4/pci1000,72@0 (mpt_sas0):
Jul 23 17:33:44 ua3500d-spb     devhdl 0x15, sasaddress 5000c5007f387a26
Jul 23 17:33:59 ua3500d-spb ^Mpanic[cpu0]/thread=ffffff001377fc40:
Jul 23 17:33:59 ua3500d-spb genunix: [ID 403854 kern.notice] assertion failed: SD_PM_IS_LEVEL_VALID(un, un->un_power_level), file: ../../common/io/scsi/targets/sd.c, line: 20703
Jul 23 17:33:59 ua3500d-spb unix: [ID 100000 kern.notice]
Jul 23 17:33:59 ua3500d-spb genunix: [ID 655072 kern.notice] ffffff001377fb20 genunix:process_type+17bb00 ()
Jul 23 17:33:59 ua3500d-spb genunix: [ID 655072 kern.notice] ffffff001377fb60 sd:sd_start_stop_unit_task+166 ()
Jul 23 17:33:59 ua3500d-spb genunix: [ID 655072 kern.notice] ffffff001377fc20 genunix:taskq_thread+318 ()
Jul 23 17:33:59 ua3500d-spb genunix: [ID 655072 kern.notice] ffffff001377fc30 unix:thread_start+8 ()
Jul 23 17:33:59 ua3500d-spb unix: [ID 100000 kern.notice]
Jul 23 17:33:59 ua3500d-spb genunix: [ID 672855 kern.notice] syncing file systems...
Jul 23 17:34:00 ua3500d-spb genunix: [ID 904073 kern.notice]  done
Jul 23 17:34:01 ua3500d-spb genunix: [ID 111219 kern.notice] dumping to /dev/zvol/dsk/rpool/dump, offset 65536, content: kernel
Jul 23 17:34:01 ua3500d-spb ahci: [ID 405573 kern.info] NOTICE: ahci0: ahci_tran_reset_dport port 0 reset port
Jul 23 17:35:14 ua3500d-spb genunix: [ID 100000 kern.notice]
Jul 23 17:35:14 ua3500d-spb genunix: [ID 665016 kern.notice] ^M100% done: 1265644 pages dumped,
Jul 23 17:35:14 ua3500d-spb genunix: [ID 851671 kern.notice] dump succeeded

出现这样的panic ，如何分析找出根本的原因，请大神赐教