Trouble Mounting Raid5 Hardware Array

Solution 1:

Presumably /dev/sda is the presentation of your Hardware RAID. I would say that it looks like you have not yet created a filesystem on your virtual disk.

mkfs.ext4 -L bigdata /dev/sda1
mount /dev/sda1/mnt                           # mount it

But before you do, consider whether you would prefer to have a filesystem that's 25TB or whether it would be more useful to have that assigned as a logical space (LVM) from which you can carve filesystems as necessary

pvcreate /dev/sda1                            # disk partition to use
vgcreate myvg /dev/sda1                       # "myvg" is name of the logical volume group
lvcreate /dev/myvg --name mylv --size 100G    # "mylv" is logical disk volume
mkfs.ext4 -L myext4 /dev/myvg/mylv            # create filesystem
mount /dev/myvg/mylv /mnt                     # mount it

The key to success with LVM is not to assign the entire space to a single filesystem, but to grow it (within reason) as required.

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