On 1/16/24 11:51, Franco Martelli wrote:
On 15/01/24 at 08:43, David Christensen wrote:
When I built and ran a Debian 2 @ HDD RAID1 using mdadm(8), I did not
partiton the HDD's -- I gave mdadm(8) the whole drives.
I don't know if it is a good idea, in fact it exists a special partition
type for RAID array listed in fdisk, I used that for my RAID:
---
~# fdisk -l /dev/sd[a-d]
Disk /dev/sda: 931,51 GiB, 1000204886016 bytes, 1953525168 sectors
Disk model: ST1000DM003-1CH1
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0x00088ecc > ...
I thought it was mandatory for a RAID to partition drives with this
partition type, am I wrong?
STFW and RTFM I have seen recommendations for and against using whole
disks for RAID and for and against using partitions for RAID. And, as
this in the Internet, there are countless rumors and speculation. As I
switched from mdadm(8) to zfs(8) years ago, perhaps another reader can
explain what mdadm(8) does when given whole disks and when given disk
partitions.
David
