[lustre-discuss] mdt mounting error

[Cowe, Malcolm J]

Is the MDT being mounted on the same node as the MGT? The ordering of the servicenode flags is (or was) significant for the first time the target is mounted, and if the services will run on different nodes, the servicenode parameters on the MDT should be swapped. And confirm that the /mdt directory exists on the server being used to mount the target.

Malcolm.

From: lustre-discuss <lustre-discuss-bounces at lists.lustre.org> on behalf of Parag Khuraswar <parag_k at citilindia.com>
Date: Wednesday, 1 November 2017 at 10:21 pm
To: 'Raj' <rajgautam at gmail.com>, Lustre discussion <lustre-discuss at lists.lustre.org>
Subject: Re: [lustre-discuss] mdt mounting error

Hi,

For mgt –
mkfs.lustre --servicenode=10.2.1.204 at o2ib --servicenode=10.2.1.205 at o2ib --mgs /dev/mapper/mpathc

For mdt
mkfs.lustre --fsname=home --mgsnode=10.2.1.204 at o2ib --mgsnode=10.2.1.205 at o2ib --servicenode=10.2.1.204 at o2ib --servicenode=10.2.1.205 at o2ib --mdt --index=0 /dev/mapper/mpatha

Regards,
Parag


From: Raj [mailto:rajgautam at gmail.com]
Sent: Wednesday, November , 2017 4:46 PM
To: Parag Khuraswar; Lustre discussion
Subject: Re: [lustre-discuss] mdt mounting error

What options in mkfs.lustre did you use to format with lustre?
On Wed, Nov 1, 2017 at 6:14 AM Parag Khuraswar <parag_k at citilindia.com<mailto:parag_k at citilindia.com>> wrote:
Hi Raj,

Yes, /dev/mapper/mpatha available.
I could format and mount using ext4.

Regards,
Parag


From: Raj [mailto:rajgautam at gmail.com<mailto:rajgautam at gmail.com>]
Sent: Wednesday, November , 2017 4:39 PM
To: Parag Khuraswar; Lustre discussion
Subject: Re: [lustre-discuss] mdt mounting error

Parag,
Is the device /dev/mapper/mpatha available?
If not, the multipathd may not have started or the multipath configuration may not be correct.
On Wed, Nov 1, 2017 at 5:18 AM Parag Khuraswar <parag_k at citilindia.com<mailto:parag_k at citilindia.com>> wrote:
Hi,

I am getting below error while mounting mdt. Mgt is mounted.

Please suggest

[root at mds2 ~]# mount -t lustre /dev/mapper/mpatha /mdt
mount.lustre: mount /dev/mapper/mpatha at /mdt failed: No such file or directory
Is the MGS specification correct?
Is the filesystem name correct?
If upgrading, is the copied client log valid? (see upgrade docs)

Regards,
Parag


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