Hi,
Reposting the problem again with complete detail and step to reproduce.
setup a targets.conf file with bs-type aio
like :
<target mgmt002st001>
driver iser
write-cache off
bs-type aio
backing-store "/dev/disk/by-path/pci-0000:16:00.0-scsi-0:2:1:0"
backing-store "/dev/disk/by-path/pci-0000:16:00.0-scsi-0:2:2:0"
backing-store "/dev/disk/by-path/pci-0000:16:00.0-scsi-0:2:3:0"
backing-store "/dev/disk/by-path/pci-0000:16:00.0-scsi-0:2:4:0"
backing-store "/dev/disk/by-path/pci-0000:16:00.0-scsi-0:2:5:0"
</target>
and try to start the service :
[root at sonas03.mgmt002st001 <mailto:root at sonas03.mgmt002st001> ~]# service tgtd restart
Stopping SCSI target daemon: not running [FAILED]
Starting SCSI target daemon: [ OK ]
tgtadm: invalid request
Command:
tgtadm -C 0 --lld iser --op new --mode logicalunit --tid 1 --lun 1 -b /dev/disk/by-path/pci-0000:16:00.0-scsi-0:2:1:0 --bstype aio
exited with code: 22.
and it seems that the underlying tgtadm component simply can't handle it anymore :
[root at sonas03.mgmt002st001 <mailto:root at sonas03.mgmt002st001> ~]# tgtadm -C 0 --lld iser --op new --mode logicalunit --tid 1 --lun 1 -b /dev/disk/by-path/pci-0000:16:00.0-scsi-0:2:1:0 --bstype aio
tgtadm: invalid request
running the same command with bstype rdwr succeeds :
tgtadm -C 0 --lld iser --op new --mode logicalunit --tid 1 --lun 2 -b /dev/disk/by-path/pci-0000:16:00.0-scsi-0:2:1:0 --bstype rdwr
also the sg type seems to be broken :
tgtadm -C 0 --lld iser --op new --mode logicalunit --tid 1 --lun 1 -b /dev/disk/by-path/pci-0000:16:00.0-scsi-0:2:1:0 --bstype sg
tgtadm: invalid request
the only one that seems to work is rdwr , which is very inefficient .
so i downloaded the latest available source version : 1.0.29
and compiled with :
make ISCSI=1 ISCSI_RDMA=1
on the system where the problem occurs and the problem is gone .
so there seems to a fix for this bug between 1.0.24 (which is what RHEL 6.3 ships) and 1.0.29
or there is a problem with the BUILD system used e.g. lib-aio not installed during compile time.
Anyone have any idea about the issue?
Thanks
Faizan
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