Raid 5 New setup

applehobbit · 1. Juni 2016

Hi

I have installed OMV on a 160 Sata hdd, and I have 4x 500GB hdd that I have setup in a Raid 5, I want to use this as a file system, to store my data. I created the Raid and it is listed under the raid management as active. However when I click on the File System tab to create a new device I am unable to select the Raid that I have just created.

Thanks

ryecoaaron · 1. Juni 2016

Do you have ssh enabled? What is the output of the following: cat /proc/mdstat

applehobbit · 1. Juni 2016

Hi

Its not version 3.00 only 2.3 I don't have SSH turned on could this be the issue?

ryecoaaron · 1. Juni 2016

I didn't say it was 3.x. That is in my signature.

ssh has nothing to do with raid but it is easier to get the output of the commands by cutting and pasting from putty (which needs ssh enabled).

applehobbit · 1. Juni 2016

Ok,

I have installed putty, when I login with my IP address and port 22, I get the error, see picture.

ryecoaaron · 1. Juni 2016

You must have disabled some options. Post a pic of your ssh options. The default options are what you want.

applehobbit · 1. Juni 2016

Hi

Thanks for your help

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Could not chdir to home directory /home/Alex: No such file or directory
$ cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md0 : active (auto-read-only) raid5 sdb[0] sde[3] sdd[2] sdc[1]
1464764928 blocks super 1.2 level 5, 512k chunk, algorithm 2 [4/4] [UUUU]

unused devices: <none>
$ Personalities : [raid6] [raid5] [raid4]
md0 : active (auto-read-only) raid5 sdb[0] sde[3] sdd[2] sdc[1]
1464764928 blocks super 1.2 level 5, 512k chunk, algorithm 2 [4/4] [UUUU]-dash: 2: Personalities: not found
$ -dash: 3: Syntax error: "(" unexpected

ryecoaaron · 1. Juni 2016

As root, try:

mdadm --readwrite /dev/md0

applehobbit · 1. Juni 2016

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Wed Jun 1 12:16:34 2016
root@openmediavault:~# mdadm --readwrite /dev/md0
root@openmediavault:~# mdadm --readwrite /dev/md0
mdadm: failed to set writable for /dev/md0: Device or resource busy
root@openmediavault:~# mdadm --readwrite /dev/md0
mdadm: failed to set writable for /dev/md0: Device or resource busy

This is the result I get when I run as root.

ryecoaaron · 1. Juni 2016

Why did you run it three times? In Linux, if there is no output, it was most likely successful. What is the output of: cat /proc/mdstat

applehobbit · 1. Juni 2016

Did not mean to,

md0 : active raid5 sdb[0] sde[3] sdd[2] sdc[1]
1464764928 blocks super 1.2 level 5, 512k chunk, algorithm 2 [4/4] [UUUU]

Thanks

ryecoaaron · 1. Juni 2016

Should be working correctly now. Might need to be mounted with mount -a

applehobbit · 1. Juni 2016

Sorry, still have working, I can not pick the raid volume to add a file system

ryecoaaron · 1. Juni 2016

What is the output of:

blkid
cat /etc/fstab

applehobbit · 1. Juni 2016

Ok great will try that tomorrow pc at work so can't try that thank you for your help

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applehobbit · 2. Juni 2016

Hi These are the results of the two comands.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Thu Jun 2 11:25:14 2016 from desktop.local
root@openmediavault:~# blkid
/dev/sda1: UUID="dd0bd066-cd15-4ee2-bc38-64e6ac4c2466" TYPE="ext4"
/dev/sda5: UUID="e33e8b30-bf84-4ce7-8a60-2dc50bfe314b" TYPE="swap"
/dev/md0: UUID="2471525a-49cd-eec6-43ad-cbcd62532541" UUID_SUB="fd3a6852-d106-3214-a9a9-366c8b691269" LABEL="openmediavault:Data" TYPE="linux_raid_member"
/dev/sdb: UUID="2946f554-afd0-f601-8a49-fb89166c428d" UUID_SUB="fa02ffb6-a681-a556-468f-f4fc7f513a40" LABEL="openmediavault:dataset1" TYPE="linux_raid_member"
/dev/sdc: UUID="2946f554-afd0-f601-8a49-fb89166c428d" UUID_SUB="ef890d79-bc3c-c4c1-2e1f-8aa38cac3f05" LABEL="openmediavault:dataset1" TYPE="linux_raid_member"
/dev/sdd: UUID="2946f554-afd0-f601-8a49-fb89166c428d" UUID_SUB="26eebac7-c648-370c-d626-0712b60b41ad" LABEL="openmediavault:dataset1" TYPE="linux_raid_member"
/dev/sde: UUID="2946f554-afd0-f601-8a49-fb89166c428d" UUID_SUB="d1248a83-2627-d719-1cbd-adc4a498c2bf" LABEL="openmediavault:dataset1" TYPE="linux_raid_member"
root@openmediavault:~#

root@openmediavault:~# cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sde1 during installation
UUID=dd0bd066-cd15-4ee2-bc38-64e6ac4c2466 / ext4 errors=remount-ro 0 1
# swap was on /dev/sde5 during installation
UUID=e33e8b30-bf84-4ce7-8a60-2dc50bfe314b none swap sw 0 0
/dev/sr0 /media/cdrom0 udf,iso9660 user,noauto 0 0
/dev/sr1 /media/cdrom1 udf,iso9660 user,noauto 0 0
root@openmediavault:~#

applehobbit · 2. Juni 2016

Hi,

I found a old post with the same fault, I used this CMD dd if=/dev/zero of=/dev/md0 bs=512 count=10000 and it now works, what file system to you recommend?

Thanks

ryecoaaron · 2. Juni 2016

ext4

applehobbit · 2. Juni 2016

Ok thanks what does this comand do? Was there something wrong I did when I created the raid ?

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ryecoaaron · 2. Juni 2016

That command doesn't do anything. You just need to create an ext4 filesystem in the filesystems tab.

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