From: "Cédric Lemarchand" <cedric.lemarchand@tdf.fr>
To: stgt@vger.kernel.org
Subject: Re: ext4 corruption with MPIO and path_grouping_policy "multibus"
Date: Wed, 17 Jan 2018 16:08:22 +0100 [thread overview]
Message-ID: <da4703e9-d6fd-fb8b-0ea3-3a084c97b939@tdf.fr> (raw)
In-Reply-To: <63aea0d2-ac82-914d-6abd-10a20538646b@tdf.fr>
For the sake of history, I solve the issue by setting "bstype aio",
which is "rdwr" by default.
Cheers
On 15/01/2018 18:55, Cédric Lemarchand wrote:
> Hello,
>
> One initiator is accessing 2 TGT instances on 2 hosts where the same
> block device is shared among them (actually an RBD volume). The
> configuration is as follow:
>
> TGT1:
> <target iqn.2017-08.storage:rbd0-1>
> direct-store /dev/rbd0
> write-cache off
> </target>
>
> TGT2:
> <target iqn.2017-08.storage:rbd0-2>
> direct-store /dev/rbd0
> write-cache off
> </target>
>
> On the initiator, when multipath is configured with
> 'path_grouping_policy "multibus"' and formated in ext4, the fsck fails
> systematically. The output of "multipath -ll" in the MP device :
>
> 360000000000000000e00000000010001 dm-17 IET,VIRTUAL-DISK
> size=93G features='1 retain_attached_hw_handler' hwhandler='0' wp=rw
> `-+- policy='service-time 0' prio=1 status=active
> |- 11:0:0:1 sds 65:32 active ready running
> `- 12:0:0:1 sdt 65:48 active ready running
>
> I not some errors when tgt start :
>
> read capacity (16): pass through os error: Inappropriate ioctl for device
> READ CAPACITY (16) failed: Sense category: -1, try '-v' option for
> more information
>
> I cannot reproduce this issue with 'path_grouping_policy "failover"',
> nor whit LIO as iSCSI target and 'path_grouping_policy "multibus"'. On
> TGT hosts, the rbd cache is disabled ("rbd cache = false").
>
>
> Did I miss something ? Any enlightenment in order to debug further
> will be welcomed.
>
> Debian Stretch
> kernel 4.9.65
> tgtd 1.0.69
> multipath-tools 0.6.4
> open-iscsi 2.0-874
--
Cédric Lemarchand
TDF
prev parent reply other threads:[~2018-01-17 15:08 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-15 17:55 ext4 corruption with MPIO and path_grouping_policy "multibus" Cédric Lemarchand
2018-01-17 15:08 ` Cédric Lemarchand [this message]
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