[SOLVED] Raid problem, 1 of 4 disks dead, replaced with same, now what? Debian

computersavvy · 01-02-2021, 02:06 PM

don't know, I am on fedora at present and always used RH based systems. I have never needed to install man on anything I have used in the past 30 years. You might open a new thread for help on that.

I suspect that is a minimal installed system and likely does not have the docs installed by default.

CJBIII · 01-02-2021, 02:10 PM

https://youtu.be/scMkYQxBtJ4

This is a tutorial by Chris Titus about LVM and it seems to explain this very well. Sorry about the link if that is a faux pax. I am a visual learner and I have to combine reading with seeing something demonstrated and I am in a linux desert in my area.

I see that I have to partition first (gparted), then create physical volumes, volume group and then logical volumes and then the filesystem. What could go wrong? lol

Already posted in the forum about the man pages and am waiting

computersavvy · 01-02-2021, 02:13 PM

to use watch this command would work

Code:

 watch -n 30 "cat /proc/mdstat"

would give you an update every 30 seconds. or change the number after the -n if you wanted a different interval (in seconds)

computersavvy · 01-02-2021, 03:47 PM

That video has a lot of detail in 20 minute so the only comments I have are:

He did not talk about creating a VG nor an LV but his display was adding a PV to the existing Vg and extending the existing LV and the commands are a bit different.

The name of the array to partition it will be /dev/md0 and the partition to create will become /dev/md01.

Code:

 gparted /dev/md0

The name of the physical device when you create the PV will be the raid array partition /dev/md01.

Code:

pvcreate /dev/md01

now pvscan will return the pvname to use in the next command.

You will then need to create the VG. (the -v makes it verbose) Insert your chosen vgname and use the pvname returned by pvscan above.

Code:

 vgcreate -v vgname pvname

now vgscan will return the vgname to use in the next command.

Now create your LV to hold the data
-L allows specifying the size of the volume in units. Change the value as you see fit.
-ay = activate yes (to make it immediately active)
-v = verbose
everything else is standard and automatic.
You need to fill in the name of the VG you created earlier and the new lvname you want to use.

Code:

lvcreate -L 1000G /dev/vgname -ay -v lvname

Now lvscan will return the lvname to use for creating the filesystem

Code:

mkfs.ext4 lvname

formats the LV as ext4 so it is ready to use.

At this point things are ready to mount the LV and start using it.

EDIT:
I noted you are minimal install so instead of gparted use fdisk instead to create the partition.

CJBIII · 01-02-2021, 06:34 PM

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