Can I setup RAID with different size hard drives?

Can I setup RAID with different size hard drives?

You can always mix drive sizes in RAID. And in plain RAID you always get the smallest common size from all drives. So in your case, each drive use 4TB. If you added one 1TB drive, all the drives would act as 1TB drives.

How much capacity do you lose with RAID 5?

RAID 5 results in the loss of storage capacity equivalent to the capacity of one hard drive from the volume. For example, three 500GB hard drives added together comprise 1500GB (or roughly about 1.5 terabytes) of storage.

Do all drives need to be the same size for RAID 5?

Do all drives have to be the same model and capacity for a RAID 5 array? The short answer is No, the drives don’t have to be exactly the same. The longer explanation is that for compatibility reasons, we usually recommend using the same model.

Do all drives need to be the same size for RAID?

Must hard drives in a RAID array be identical? No. It is perfectly valid to use hard drives from different manufacturers, model numbers, sizes, and rotational speed (spindle speed or RPM).

Do all drives have to be the same size for RAID 5?

Can you add drives to RAID 5 without losing data?

Extend RAID 5 volume by adding a new disk. If there is no free space in all other virtual drives on the RAID 5 array, you can add a new disk to this RAID 5 array. After that the new disk space will be displayed as Unallocated at the end of the raid array, then you can extend the RAID 5 partition with the new disk space …

Can RAID 6 be expanded?

Hello, there are no limitations for RAID 6, so you shuld be able to expand the RAID. First of all, make sure that you are running latest Controller Firmware and lastest Smart Storage Administrator Version. The Smart Storage Administrator does no longer need to first expand and than extend like the old ACU.

How to create a RAID 5 storage array with’mdadm’?

An Ubuntu machine with a non-root user with sudo permission. Multiple raw storage devices for creating RAID storage. To accomplish this demo, we need a minimum of 3 storage devices. To find the attached storages to the machine, we can use the below command. Creating the New RAID 5 Array using the ‘mdadm’ command.

Which is the default mode in mdadm Linux?

A bit of a misnomer, this mode takes care of all operations that change the size of an array, such as changing the raid level, changing the number of active devices, etc. This is the default mode, and is used primarily to add and remove devices.

How big is a RAID 5 storage array?

As we can see in the above output, we have 3 disks without any filesystem with 20GB and the devices are named as /dev/sda, /dev/sdb and /dev/sdc for this machine or session.

Why do I need initramfs to run mdadm?

It scans the drives, looking for superblocks, and rebuilds all the arrays for you. This is why you need an initramfs when booting off a raid array – because mdadm is a user-space program, if root is on an array then we have a catch-22 – we can’t boot until we have root, and we can’t have root until we’ve booted and can run mdadm.