How to force a reset of a device (disk) in an enclosre slot

[John]

Hi Folks,

   I've been poking around and can't seem to find a way to reset and
hopefully acquire access to a disk device in an enclosure. For instance:

FreeBSD 9.1-PRERELEASE

# camcontrol smpphylist ses4
37 PHYs:
PHY  Attached SAS Address
  0  0x5000039368233602   <HP EG0600FBDSR HPD4>             (pass105,da98)
  1  0x5000039368238e3e   <HP EG0600FBDSR HPD4>             (pass106,da99)
  2  0x500003936823bca2   <HP EG0600FBDSR HPD4>             (pass107,da100)
  3  0x500003936819507e   <HP EG0600FBDSR HPD4>             (pass108,da101)
  4  0x5000039368197d5a   <HP EG0600FBDSR HPD4>             (pass109,da102)
  5  0x5000039368197c6e   <HP EG0600FBDSR HPD4>             (pass110,da103)
  6  0x500003936818770e   <HP EG0600FBDSR HPD2>             (pass111,da104)
  7  0x5000039368238eba   <HP EG0600FBDSR HPD4>             (pass112,da105)
  8  0x5000039368232f42   <HP EG0600FBDSR HPD4>             (pass113,da106)
  9  0x0000000000000000
 10  0x500003936813c31e
 11  0x5000039368233892   <HP EG0600FBDSR HPD4>             (pass114,da107)
 12  0x500003936813c2ca   <HP EG0600FBDSR HPD4>             (pass115,da108)
...

Note, bay/slot 10 has a listed device address. If I were to pull the
drive and re-insert it, it would show up (as da390 in this case).
The above is after a fresh reboot. Note da106 to da107 skipping
slot 10 (slot 9 is empty).

The smp utils provide a similar view:

# smp_discover /dev/ses4 
  phy   0:D:attached:[5000039368233602:00  t(SSP)]  6 Gbps
  phy   1:D:attached:[5000039368238e3e:00  t(SSP)]  6 Gbps
  phy   2:D:attached:[500003936823bca2:00  t(SSP)]  6 Gbps
  phy   3:D:attached:[500003936819507e:00  t(SSP)]  6 Gbps
  phy   4:D:attached:[5000039368197d5a:00  t(SSP)]  6 Gbps
  phy   5:D:attached:[5000039368197c6e:00  t(SSP)]  6 Gbps
  phy   6:D:attached:[500003936818770e:00  t(SSP)]  6 Gbps
  phy   7:D:attached:[5000039368238eba:00  t(SSP)]  6 Gbps
  phy   8:D:attached:[5000039368232f42:00  t(SSP)]  6 Gbps
  phy  10:D:attached:[500003936813c31e:00  t(SSP)]  6 Gbps
  phy  11:D:attached:[5000039368233892:00  t(SSP)]  6 Gbps
  phy  12:D:attached:[500003936813c2ca:00  t(SSP)]  6 Gbps
...

The address of slot 10 matches. There is a disk in the slot - just
isn't recognized and attached.

Back to the basic question. How can I issue a command to the enclosure
to force a re-initialization of the device to recover it without
having to physically pull & insert it. Even if the device numbers
are not sequential, I need access to the drive...

Thoughts?

Thanks,
John