iSCSI LUNs Disappear After Removing the iscsi_v1.dbc and iscsi_v1.dbp Configuration Files
(Doc ID 2632388.1)
Last updated on OCTOBER 05, 2022
Applies to:
Solaris Operating System - Version 11.1 and laterInformation in this document applies to any platform.
Symptoms
Sometimes it is necessary to delete and recreate the /etc/iscsi/iscsi_v1.dbc and /etc/iscsi/iscsi_v1.dbp configuration files. Such action may cause the iSCSI LUNs to disappear from the format command output, after a reboot. Following such action, the 'iscsiadm list target -S' command will show the following output:
Target: iqn.1986-03.com.sun:02:6992052b-995d-ed93-bac9-b007f78d3999
Alias: iscsi-target-0
TPGT: 2
ISID: 4000002a0000
Connections: 1
Target: iqn.1986-03.com.sun:02:6310ff87-12c2-6313-c6b8-c7d39302986f
Alias: t4-2-brm06-g-iSCSI
TPGT: 2
ISID: 4000002a0000
Connections: 1
Note the taget IQN shows up, but the LUNs mapped to such target INQ do not show up. Also, note the
/var/adm/messages show the target IQNs transition from offline to online, as follows:
Date HostName iscsi: [ID 559844 kern.notice] NOTICE: iscsi session(47) iqn.1986-03.com.sun:02:55437422-3f65-6800-d43f-9d4defa8bee6 offline
Date HostName iscsi: [ID 559844 kern.notice] NOTICE: iscsi session(50) iqn.1986-03.com.sun:02:6310ff87-12c2-6313-c6b8-c7d39302986f offline
Date HostName iscsi: [ID 559844 kern.notice] NOTICE: iscsi session(47) iqn.1986-03.com.sun:02:55437422-3f65-6800-d43f-9d4defa8bee6 online
Date HostName iscsi: [ID 559844 kern.notice] NOTICE: iscsi session(50) iqn.1986-03.com.sun:02:6310ff87-12c2-6313-c6b8-c7d39302986f online
If you obtain the snoop data during a 'icsiadm modify discovery -[s|t|i]' disable/enable',
or during a reboot cycle, you will notice a Check Conditions returned for some basic commands,
such as Test Unit Ready (TUR) or Report LUN, as follows:
[LUN: 0x0000]
[Command Set:Unknown or no device type (0x1f) ]
Opcode: Test Unit Ready (0x00)
Select Report: Select All LUNs (0x00)
Additional Sense Length: 10
Command-Specific Information: 00000000
.... 0101 = Sense Key: Illegal Request (0x5)
Additional Sense Code+Qualifier: Logical Unit Not Supported (0x2500)
No. Time Source Destination Protocol Length Info
126 18.961270 10.145.226.52 10.145.226.53 iSCSI 134 SCSI Response (Check Condition) LUN:0x00
SCSI CDB Report LUNs
[LUN: 0x0000]
[Command Set:Unknown or no device type (0x1f) ]
Opcode: Report LUNs (0xa0)
Select Report: Select All LUNs (0x00)
Additional Sense Length: 10
Control: 0x00
.... 0101 = Sense Key: Illegal Request (0x5)
Additional Sense Code+Qualifier: Logical Unit Not Supported (0x2500)
No. Time Source Destination Protocol Length Info
129 18.961423 10.145.226.52 10.145.226.53 iSCSI 134 SCSI Response (Check Condition) LUN:0x00
Changes
Cause
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In this Document
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