Re: mdadm usage
On 30.12.2020 15:42, Thomas A. Anderson
wrote:
it could all very well be, that I have borked these two drives. It's not
the end of the world, there was no data loss, and the data was already
transferred off of them. And, my lesson has been learned. RAID sounds
all good and dandy, and does provide some protection against data loss
caused by hardware failure.
It appears to be misconfigured, because at least partition type
should be "fd". Not "83" as in your case, which looks like VMWare
Storage partition type.
I'm not a VMWare expert so I can't give any advice here.
Now it looks like you've dealing with some advanced system
configuration and virtualization, not with a simple one like plain
hardware and 2 drives.
Which bring me to my final question, just for closure.
If hardware raid (like if I bought a controller), would it be any
different, if I removed the drives and just put on one another machine
-- would I be able to see the data on it like a normal drive? Or would I
run into the same issue??
The only advantage hardware raid controller (not a simple HBA) could
offer is a performance. But it also adds an additional point of
failure - the raid controller itself.
When hardware raid controller fails, in most cases, you have to
replace it with the same model, or if same model won't be available
due to EoL or discontinuity,
with a compatible one from the same make\brand, to reassemble RAID
array on the drives and access data.
The trend of the industry seems to be going away from hardware raid
solutions, replacing them with software defined solutions.
In case of software defined RAID, like "mdraid" or "Microsoft
Storage Spaces", you can reassemble array and access data on another
machine.
Speaking of "mdraid", with properly configured RAID1, you can even
use a single drive from the array to access data on another machine.
If this will be a drive with working OS, it will boot up normally
and report about degraded state of RAID1 array and about missing one
(or more if it's a three-way mirror) of it's member drives.
--
With kindest regards, Alexander.
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