[stgt] targets.conf problem, setting up tape drives

[Albert Pauw]

On 10/26/2009 04:27 PM, Tomasz Chmielewski wrote:
>
>> Looking at it using wireshark I can see that the Login Command is 
>> generated every 17-18 seconds,
>> even after the mtx command had failed.
>>
>> So there seems to be something weirdly configured this way, compared 
>> to the "manually" created
>> device with a script.
>
> Did you compare the tgtadm commands generated with your config, and 
> the ones you used before?
>
One thing I noticed, is that the changer is defined before the (in my 
case) three tape drives.
One of the configuration options for the changer is a reference to the 
tape drives using the lun number:

tgtadm --lld iscsi --op update --mode logicalunit --tid 1 --lun=4 
--params "element_type=4,address=500,tid=1,lun=1"
tgtadm --lld iscsi --op update --mode logicalunit --tid 1 --lun=4 
--params "element_type=4,address=500,tid=1,lun=2"
tgtadm --lld iscsi --op update --mode logicalunit --tid 1 --lun=4 
--params "element_type=4,address=500,tid=1,lun=3"

Only later on, the luns are defined:
tgtadm --lld iscsi --op new --mode logicalunit --tid 1 --lun 1 -b 
/root/tapes/notape1 --device-type tape
tgtadm --lld iscsi --op update --mode logicalunit --tid 1 --lun=1 
--params scsi_sn="HUM1A00001"
tgtadm --lld iscsi --op update --mode logicalunit --tid 1 --lun=1 
--params scsi_id="HP LTO3 ULTRIUM"
tgtadm --lld iscsi --op update --mode logicalunit --tid 1 --lun=1 
--params product_id="LTO3 ULTRIUM"
tgtadm --lld iscsi --op update --mode logicalunit --tid 1 --lun=1 
--params removable="1"
tgtadm --lld iscsi --op update --mode logicalunit --tid 1 --lun=1 
--params vendor_id="HP"
tgtadm --lld iscsi --op update --mode logicalunit --tid 1 --lun=1 
--params product_rev="0001"
# Write cache is enabled (default) for lun 1.

This maybe a reason for the problems?

Albert


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