From: Konrad Rzeszutek <konrad@virtualiron.com>
To: device-mapper development <dm-devel@redhat.com>
Subject: Re: How does multipath tool handle Lun remapping?
Date: Fri, 16 Jan 2009 13:13:28 -0500 [thread overview]
Message-ID: <20090116181327.GD1493@mars.virtualiron.com> (raw)
In-Reply-To: <d364733c0901160042n65184828pcac1e7a6435b6c9c@mail.gmail.com>
On Fri, Jan 16, 2009 at 04:42:25PM +0800, 谢纲 wrote:
> Hi,
>
> multipath path tool use the external program, such as scsi_id in udev,
> to get the id of the lun. But how does it handle the lun remapping?
> For example, at first, thiere is a lun in array:lun1, it is mapped to
> host with lun id 11. On the host, I use the multipath program to
> generate a multipath device for this lun. Then I unmap lun1 and
> another lun: lun2 which is mapped to the host with the same lun id 11.
Do you reboot the system after those unmaps/maps?
> In this situation, it seems that the multipath tool could not notice
> that there is a change of lun even after recreate the multipath
> device, is that true?
It would - as long as hte block devices get re-created/deleted
for the new/old LUNs.
>
> Thanks,
>
> --
> Xie Gang
>
> --
> dm-devel mailing list
> dm-devel@redhat.com
> https://www.redhat.com/mailman/listinfo/dm-devel
next prev parent reply other threads:[~2009-01-16 18:13 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-16 8:42 How does multipath tool handle Lun remapping? 谢纲
2009-01-16 18:13 ` Konrad Rzeszutek [this message]
2009-01-20 3:17 ` 谢纲
2009-01-20 15:44 ` Konrad Rzeszutek
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