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add doc/README.ssc
We need to add more information (simple configuration examples, etc) however this is a start. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
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Introduction | ||
------------- | ||
The SSC emulation in TGTD can emulate tape drives by using files. This | ||
virtualization technology is known as a virtual tape library (VTL). | ||
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Solaris tips | ||
------------- | ||
If one wants to get VTL working on a Solaris initiator (and this | ||
target of course under Linux) then it is rather simple to get a tape | ||
drive working. Getting the changer device working under Solaris | ||
(OpenSolaris) take a bit more effort. This file describes the way to | ||
do it. | ||
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Although most of it is probably well know to Solaris fans, it took me | ||
a bit of time to figure out to get the VTL target working fine under | ||
OpenSolaris. For those who want to give it a try, here are the | ||
commands: | ||
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For normal disk and cd targets no files have to be changed. All you | ||
need is the following: | ||
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# svcadm enable iscsi_initiator | ||
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and check if it is online: | ||
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# svcs iscsi_initiator | ||
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the state should be online. | ||
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Now we add the discovery address to the initiator: | ||
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# iscsiadm add discovery-address <IP of target> | ||
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Now we configure the discovery mode to sendtargets: | ||
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# iscsiadm modify discovery -t enable | ||
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Check the target: | ||
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# iscsiadm list target -S | ||
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And create the device files: | ||
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# devfsadm -i iscsi | ||
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Tape devices will be shown properly, but not the changer device, this | ||
takes a bit more work. Two files need to be changed, and a reboot is | ||
needed to set things up properly. | ||
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In the file /etc/driver_aliases the two lines | ||
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sgen "scsa,08.bfcp" | ||
sgen "scsa,08.bvhci" | ||
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need to be replaced with | ||
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sgen "scsiclass,08" | ||
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The file /kernel/drv/sgen.conf, which is basically all commented out | ||
needs to have the following lines: | ||
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device-type-config-list="changer","sequential"; | ||
inquiry-config-list= "*", "*"; | ||
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name="sgen" class="scsi" target=0 lun=4; | ||
name="sgen" class="scsi" target=1 lun=4; | ||
name="sgen" class="scsi" target=2 lun=4; | ||
name="sgen" class="scsi" target=3 lun=4; | ||
name="sgen" class="scsi" target=4 lun=4; | ||
name="sgen" class="scsi" target=5 lun=4; | ||
name="sgen" class="scsi" target=6 lun=4; | ||
name="sgen" class="scsi" target=7 lun=4; | ||
name="sgen" class="scsi" target=8 lun=4; | ||
name="sgen" class="scsi" target=9 lun=4; | ||
name="sgen" class="scsi" target=10 lun=4; | ||
name="sgen" class="scsi" target=11 lun=4; | ||
name="sgen" class="scsi" target=12 lun=4; | ||
name="sgen" class="scsi" target=13 lun=4; | ||
name="sgen" class="scsi" target=14 lun=4; | ||
name="sgen" class="scsi" target=15 lun=4; | ||
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For the last bit it should be noted that my changer was set to lun 4, | ||
and since I don't know which target I put all target numbers in (0-15). | ||
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After these modifications the best is to reboot the machine, and do | ||
the iscsi commands above, and he presto it works: | ||
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In my case, three tape drives and one changer: | ||
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root@solar:/kernel/drv# iscsiadm list target -S | ||
Target: iqn.2008-09.com.example:server.tape | ||
Alias: - | ||
TPGT: 1 | ||
ISID: 4000002a0000 | ||
Connections: 1 | ||
LUN: 4 | ||
Vendor: STK | ||
Product: L700 | ||
OS Device Name: /dev/scsi/changer/c0t0d0 | ||
LUN: 3 | ||
Vendor: HP | ||
Product: LTO3 ULTRIUM | ||
OS Device Name: /dev/rmt/2n | ||
LUN: 2 | ||
Vendor: HP | ||
Product: LTO3 ULTRIUM | ||
OS Device Name: /dev/rmt/1n | ||
LUN: 1 | ||
Vendor: HP | ||
Product: LTO3 ULTRIUM | ||
OS Device Name: /dev/rmt/0n | ||
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root@solar:/kernel/drv# mtx -f /dev/scsi/changer/c0t0d0 status | ||
Storage Changer /dev/scsi/changer/c0t0d0:3 Drives, 29 Slots ( 5 Import/Export ) | ||
Data Transfer Element 0:Empty | ||
Data Transfer Element 1:Empty | ||
Data Transfer Element 2:Empty | ||
Storage Element 1:Full :VolumeTag=A0000001 | ||
Storage Element 2:Full :VolumeTag=A0000002 | ||
Storage Element 3:Full :VolumeTag=A0000003 | ||
Storage Element 4:Full :VolumeTag=A0000004 | ||
Storage Element 5:Full :VolumeTag=A0000005 | ||
Storage Element 6:Full :VolumeTag=A0000006 | ||
Storage Element 7:Full :VolumeTag=A0000007 | ||
Storage Element 8:Full :VolumeTag=A0000008 | ||
Storage Element 9:Empty:VolumeTag= | ||
Storage Element 10:Empty:VolumeTag= | ||
Storage Element 11:Empty:VolumeTag= | ||
Storage Element 12:Empty:VolumeTag= | ||
Storage Element 13:Empty:VolumeTag= | ||
Storage Element 14:Empty:VolumeTag= | ||
Storage Element 15:Empty:VolumeTag= | ||
Storage Element 16:Empty:VolumeTag= | ||
Storage Element 17:Empty:VolumeTag= | ||
Storage Element 18:Empty:VolumeTag= | ||
Storage Element 19:Empty:VolumeTag= | ||
Storage Element 20:Empty:VolumeTag= | ||
Storage Element 21:Empty:VolumeTag= | ||
Storage Element 22:Empty:VolumeTag= | ||
Storage Element 23:Empty:VolumeTag= | ||
Storage Element 24:Full :VolumeTag=CLN00001 | ||
Storage Element 25 IMPORT/EXPORT:Empty:VolumeTag= | ||
Storage Element 26 IMPORT/EXPORT:Empty:VolumeTag= | ||
Storage Element 27 IMPORT/EXPORT:Empty:VolumeTag= | ||
Storage Element 28 IMPORT/EXPORT:Empty:VolumeTag= | ||
Storage Element 29 IMPORT/EXPORT:Empty:VolumeTag= |