- Community Home
- >
- Servers and Operating Systems
- >
- Operating Systems
- >
- Operating System - Linux
- >
- Facing errors while creating Multipath-Raid using ...
Categories
Company
Local Language
Forums
Discussions
Forums
- Data Protection and Retention
- Entry Storage Systems
- Legacy
- Midrange and Enterprise Storage
- Storage Networking
- HPE Nimble Storage
Discussions
Discussions
Discussions
Forums
Discussions
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
- BladeSystem Infrastructure and Application Solutions
- Appliance Servers
- Alpha Servers
- BackOffice Products
- Internet Products
- HPE 9000 and HPE e3000 Servers
- Networking
- Netservers
- Secure OS Software for Linux
- Server Management (Insight Manager 7)
- Windows Server 2003
- Operating System - Tru64 Unix
- ProLiant Deployment and Provisioning
- Linux-Based Community / Regional
- Microsoft System Center Integration
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Community
Resources
Forums
Blogs
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
11-11-2023 10:57 PM - last edited on 11-22-2023 01:38 AM by support_s
11-11-2023 10:57 PM - last edited on 11-22-2023 01:38 AM by support_s
Facing errors while creating Multipath-Raid using mdadm
I have a server having two hdds (/dev/sdc and /dev/sdd) . Both hdds are same physical disk sent by two different paths to the sever (ISCSI Connection). I am trying to create a multipath raid device using the following command :
"mdadm --create /dev/md0 --level=multipath --raid-devices=2 /dev/sdd /dev/sdc "
But facing error
" mdadm: RUN_ARRAY failed: Invalid argument "
my /etc/mdadm.conf file
DEVICE /dev/sdd /dev/sdc
ARRAY /dev/md0 metadata=1.2 name=myarray:0 UUID=261fb9c:976d0d97:30bc63ce:85e76e91
Where UUID is some random generated unique UUID that I want to give to my newly formed md0.
Can anyone help me with this?
- Tags:
- Operating System
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
11-14-2023 06:07 AM
11-14-2023 06:07 AM
Re: Facing errors while creating Multipath-Raid using mdadm
Can you share more info about the product.. like what Server, model, storage info etc?
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
11-14-2023 11:00 PM
11-14-2023 11:00 PM
Re: Facing errors while creating Multipath-Raid using mdadm
Hey , I am using INTEL S2600WFQ server board for making multipath . On this server I am getting 2 SAS disks (a same SAS physical disk via 2 different iscsi paths) from 2 different servers which are connected to a same storage array.
I am not very sure about the two servers and the storage array details as my work is only to create multipath on the INTEL sever.
disk:
NAME - HC530
MODEL - WH721412AL5204
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
11-16-2023 12:06 AM
11-16-2023 12:06 AM
Re: Facing errors while creating Multipath-Raid using mdadm
Hi Natasha3,
May I know which OS you're using to create mdadm commands?
[Any personal opinions expressed are mine, and not official statements on behalf of Hewlett Packard Enterprise]
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
11-16-2023 01:45 AM
11-16-2023 01:45 AM
Re: Facing errors while creating Multipath-Raid using mdadm
OS - Redhat 8.7
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
11-16-2023 03:41 AM
11-16-2023 03:41 AM
Re: Facing errors while creating Multipath-Raid using mdadm
Hi Natasha3,
Kindly follow the example link from Red Hat itself on how to create software RAID.
I hope that helps in resolving your issue
[Any personal opinions expressed are mine, and not official statements on behalf of Hewlett Packard Enterprise]
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
11-16-2023 03:46 AM
11-16-2023 03:46 AM
Re: Facing errors while creating Multipath-Raid using mdadm
Hi Natasha3,
We do not see option of multipath for mdadm as earlier found to be in RHEL 5/6.
[Any personal opinions expressed are mine, and not official statements on behalf of Hewlett Packard Enterprise]
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
11-17-2023 02:04 AM
11-17-2023 02:04 AM
Re: Facing errors while creating Multipath-Raid using mdadm
Hey @utnoor , Thankyou for the reply .
I am asked to configure multipath only and not raid.
Is there any alternative for creating multipath instead of using mdadm?
or should one from the above discussion conclude that one cannot create multipath on 2 same disks (which host receives via 2 diffrent iscsi path) using any open source utilities on any open source OS present currently?
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
11-17-2023 07:03 AM
11-17-2023 07:03 AM
Re: Facing errors while creating Multipath-Raid using mdadm
Hi Natasha3,
When you try to create the software raid you get error " mdadm: RUN_ARRAY failed: Invalid argument " at the same time, when you check the log messages you should see error "md: personality for level -4 is not loaded!" which means the module for md_multipath is not loaded (i.e., for --level=multipath) & from developers we see is "MD_MULTIPATH provides a simple multi-path personality for use the MD framework. It is not under active development. New projects should consider using DM_MULTIPATH which has more features and more testing" ................And from the kernel source code it is available but **cannot** be loaded into the kernel..........like " dracut:Failed to install module md_multipath".....................for your scenario guidance follow this step by step guide.........https://www.qsan.com/data/dl_files/qs_wp_iSCSI-MPIO-in-Linux%20(en).pdf ________________________xXx_____________________
[Any personal opinions expressed are mine, and not official statements on behalf of Hewlett Packard Enterprise]
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
11-19-2023 11:03 PM
11-19-2023 11:03 PM
Re: Facing errors while creating Multipath-Raid using mdadm
Hey @utnoor ,
Followed the document "https://www.qsan.com/data/dl_files/qs_wp_iSCSI-MPIO-in-Linux%20(en).pdf" , multipath was created only on local disk and not the disks sent via ISCSI paths.
Can you help me with creation of multipath on iscsi disks?