[Iscsitarget-devel] Fwd: [Fwd: Re: exporting dmraid devices ?]

[C. G. <cos...@gm...>]

---------- Forwarded message ----------
From: Costin Guşă <cos...@gm...>
Date: 2008/10/22
Subject: Re: [Iscsitarget-devel] [Fwd: Re: exporting dmraid devices ?]
To: "Ross S. W. Walker" <RW...@me...>


2008/10/21 Ross S. W. Walker <RW...@me...>:
> Arne Redlich forwarded:
>>
>> Costin Guşă wrote:
>> >
>> > Hi,
>> > I'm trying to export a dmraid device (aka 'fake raid')
>> > Please CC me when replying, as I'm not subscribed!
>> >

[...]

>> > ********* result:
>> >
>> > root@lenny:~# tail  -fn0 /var/log/all &
>> > [1] 8231
>> > root@lenny:~# /etc/init.d/iscsitarget start
>> > Starting iSCSI enterprise target service: succeeded.
>> > root@lenny:~# Oct 21 21:25:42 lenny kernel: [ 4667.373799] iSCSI
>> > Enterprise Target Software - version 0.4.16
>> > Oct 21 21:25:42 lenny kernel: [ 4667.373833] iscsi_trgt: Registered io
>> > type fileio
>> > Oct 21 21:25:42 lenny kernel: [ 4667.373835] iscsi_trgt: Registered io
>> > type blockio
>> > Oct 21 21:25:42 lenny kernel: [ 4667.373836] iscsi_trgt: Registered io
>> > type nullio
>> > Oct 21 21:25:42 lenny kernel: [ 4667.376847] iscsi_trgt:
>> > blockio_open_path(167) Can't open device
>> > /dev/mapper/isw_behdbbacee_SYSTEM, error -16
>> > Oct 21 21:25:42 lenny kernel: [ 4667.376847] iscsi_trgt:
>> > blockio_attach(354) Error attaching Lun 0 to Target
>> > iqn.2009-10.tld.lenny:ich9.behdbbacee.SYSTEM
>> > Oct 21 21:25:42 lenny ietd: Can't create a logical unit 16 1 0
>> > Path=/dev/mapper/isw_behdbbacee_SYSTEM,Type=blockio
>> > Oct 21 21:25:42 lenny ietd: Can't create a logical unit 16 2 1
>> > Path=/dev/mapper/isw_behdbbacee_DATA,Type=blockio
>> > Oct 21 21:25:42 lenny kernel: [ 4667.376847] iscsi_trgt:
>> > blockio_open_path(167) Can't open device
>> > /dev/mapper/isw_behdbbacee_DATA, error -16
>> > Oct 21 21:25:42 lenny kernel: [ 4667.376847] iscsi_trgt:
>> > blockio_attach(354) Error attaching Lun 1 to Target
>> > iqn.2009-10.tld.lenny:ich9.behdbbacee.DATA
>> >
>> > Looking up the error code with perror it seems to mean "Device or resource busy"
>> > Ideas?
>
> Yes, you have a partition mounted, by are trying to export the
> parent device!
>

[...]

Thanks for the quick reply, Ross!

What about the other drive, which apparently is not accessed by
anyone? (/dev/mapper/isw_behdbbacee_DATA). The error message seems to
be produced by the iscsi_trgt kernel module rather than the ietd
daemon:

Oct 21 21:25:42 lenny kernel: [ 4667.376847] iscsi_trgt:
blockio_open_path(167) Can't open device
/dev/mapper/isw_behdbbacee_DATA, error -16