'camcontrol rescan all' does not find the attached tape drive
Scott Long
scottl at samsco.org
Tue May 2 22:25:38 UTC 2006
This is a problem with the RAID controller that you've hooked the tape
drive to, it has nothing to do with FreeBSD. If this is a configuration
that you much use, and there is absolutely no way that you can find a
simple SCSI controller to hook the tape drive up to, then you'll need
to investigate how to use the ASR management tools to do a manual
rescan before running camcontrol.
Scott
Adam wrote:
> Hello list.
>
> Using camcontrol, I cannot get freebsd 6.1-RC1 to recognize an attached
> tape drive. Is this normal?
>
> If the machine boots with the tape drive turned off, I cannot get the tape
> drive to be recognized after I turn the tape drive on.
>
> # camcontrol rescan 1
> Re-scan of bus 1 was successful
> # camcontrol rescan all
> Re-scan of bus 0 was successful
> Re-scan of bus 1 was successful
> # camcontrol devlist -v
> scbus0 on asr0 bus 0:
> <ADAPTEC RAID-5 3B0A> at scbus0 target 0 lun 0 (da0,pass0)
> <SUPER GEM318 0> at scbus0 target 6 lun 0 (ses0,pass1)
> < > at scbus0 target -1 lun -1 ()
> scbus1 on asr0 bus 1:
> < > at scbus1 target -1 lun -1 ()
> scbus-1 on xpt0 bus 0:
> < > at scbus-1 target -1 lun -1 (xpt0)
>
> If the machine boots up while the tape drive is attached and powered up,
> the tape drive is recognized.
>
> # camcontrol devlist
> <ADAPTEC RAID-5 3B0A> at scbus0 target 0 lun 0 (da0,pass0)
> <SUPER GEM318 0> at scbus0 target 6 lun 0 (ses0,pass1)
> <HP Ultrium 2-SCSI S24D> at scbus1 target 6 lun 0 (sa0,pass2)
>
> Here are some more details about my setup.
>
> machine:
>
> - supermicro super server 6013P-8 with zero channel raid controller
> - SMP hardware, UP kernel with ASR_COMPAT
> - FreeBSD name 6.1-RC FreeBSD 6.1-RC #1: Fri Apr 21 16:09:23 MDT 2006
> - Adaptec AIC-7902 Dual-Channel Ultra-320 Controller
> - Adaptec 2015S ZCR Card
>
> relevant dmesg data:
>
> asr0: <Adaptec Caching SCSI RAID> mem 0xf8300000-0xf83fffff,0xfb000000-0xfbffffff,0xfc000000-0xfdffffff irq 30 at device 3.0 on pci3
> asr0: [GIANT-LOCKED]
> asr0: ADAPTEC 2015S FW Rev. 3B0A, 2 channel, 256 CCBs, Protocol I2O
>
> sa0 at asr0 bus 1 target 6 lun 0
> sa0: <HP Ultrium 2-SCSI S24D> Removable Sequential Access SCSI-3 device
> ses0 at asr0 bus 0 target 6 lun 0
> ses0: <SUPER GEM318 0> Fixed Processor SCSI-2 device
> ses0: SAF-TE Compliant Device
> da0 at asr0 bus 0 target 0 lun 0
> da0: <ADAPTEC RAID-5 3B0A> Fixed Direct Access SCSI-2 device
> da0: Tagged Queueing Enabled
> da0: 70006MB (143372288 512 byte sectors: 255H 63S/T 8924C)
>
> When I power down and disconnect the tape drive /var/log/messages receives
> the following.
>
> Apr 26 13:57:20 name kernel: (sa0:asr0:1:0:0): lost device
> Apr 26 13:57:20 name kernel: (sa0:asr0:1:0:0): removing device entry
>
> So I reboot, and try a different disconnect method.
>
> # camcontrol stop sa0
> Unit stopped successfully
> # camcontrol devlist
> <ADAPTEC RAID-5 3B0A> at scbus0 target 0 lun 0 (da0,pass0)
> <SUPER GEM318 0> at scbus0 target 6 lun 0 (ses0,pass1)
> <HP Ultrium 2-SCSI S24D> at scbus1 target 6 lun 0 (sa0,pass2)
>
> Then I power off the tape unit and attach a new unit (attach scsi cable,
> power cable, then power on the unit).
>
> # camcontrol tur sa0 -E -C 4 -v
> error sending test unit ready: Device not configured
> (pass2:asr0:1:6:0): TEST UNIT READY. CDB: 0 0 0 0 0 0
> (pass2:asr0:1:6:0): CAM Status: CCB request is in progress
>
> /var/log/messages got the following 2 lines as soon as I launched
> camcontrol:
>
> Apr 26 15:32:27 name kernel: (sa0:asr0:1:6:0): lost device
> Apr 26 15:32:27 name kernel: (sa0:asr0:1:6:0): removing device entry
>
> # camcontrol rescan pass2
> Re-scan of bus 0 was successful
>
> This is a problem as the tape drive (pass2) was on bus 1. Granted, pass2
> was pointing to sa0:asr0:1:6:0 and the device that is now attached is
> connected via asr0:1:0:0.
>
> adamu010# camcontrol rescan all
> Re-scan of bus 0 was successful
> Re-scan of bus 1 was successful
> # camcontrol devlist
> <ADAPTEC RAID-5 3B0A> at scbus0 target 0 lun 0 (da0,pass0)
> <SUPER GEM318 0> at scbus0 target 6 lun 0 (ses0,pass1)
> # camcontrol rescan 1:0:0
> Re-scan of 1:0:0 was successful
> # camcontrol devlist
> <ADAPTEC RAID-5 3B0A> at scbus0 target 0 lun 0 (da0,pass0)
> <SUPER GEM318 0> at scbus0 target 6 lun 0 (ses0,pass1)
> # camcontrol reset 1
> Reset of bus 1 was successful
> # camcontrol rescan 1
> Re-scan of bus 1 was successful
> # camcontrol devlist 1
> <ADAPTEC RAID-5 3B0A> at scbus0 target 0 lun 0 (da0,pass0)
> <SUPER GEM318 0> at scbus0 target 6 lun 0 (ses0,pass1)
>
> The drive documentation states that the drive's auto-termination is only
> in effect when the drive is powered on. Does that mean I have an
> unterminated bus when the tape drive is off? Perhaps the aic7902
> auto-terminates scbus1? How does termination influence what camcontrol
> sees? The tape drive is not detected without a reboot. Despite the fine
> man page for camcontrol and several examples provided by google of other
> users using camcontrol to successfully reattach devices, I cannot do it.
> I assume I have done something wrong, like misunderstanding how scsi
> devices and/or termination function. Can anyone point out what I am doing
> wrong and/or tell me how to change tape drives without rebooting my box?
>
> Thank you for any help!
>
> Adam
>
> ps: Please CC me as I am not subscribed to this list. TIA!
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