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On modern hardware RAID controllers, RAID metadata is written to the disks, so they are somewhat portable, with restrictions on drive ordering; they have to be moved together. However, this is the wrong way to handle backups. Intentionally failing (groups of) disks and forcing a degraded array is fraught and a bad approach to accomplishing offsite backup. ...


3

The problem is that with the first command you create a new logical drive - when finished you will have two LDs, each containing one disk. What you need to do instead is add the unassigned disk to the original RAID0 LD and then invoke the modify command. In other words: ctrl slot=0 ld=1 add drives=allunassigned And then: ctrl slot=0 ld=1 modify raid=1 ...


3

What can I do to attempt to recover the files? Stop what you are doing. Power off the server. Remove the hard drives and ship them off to a professional data recovery shop. Period, full stop. You haven't a clue how exactly it was configured before, and anything more you do to it will cause further issues. I've had an idea of reconfiguring the RAID ...


2

So you have a redundant array of disks that started to die. And you want to migrate it to the raid level where the death of a single disk will be fatal for data. My opinion - it's some sort of complicated suicide.


1

You appear to have had a drive failure. Is it possible to recovery data from this raid? No. At least not with the tools you have available. RAID 0 has ZERO redundancy and ZERO protection for your data in the event of a disk failure (or someone inadvertently pulling a drive out while the system is running). As others have said, replace the drive, ...


1

If you want safety then don't use RAID 0, software RAID 0 will survive system crash. More important question is how file system integrality will look like after crash, for example under default configuration ext4 with journal and write barriers is quite safe. During unexpected reboot it's possible that you will lose not committed data (so called dirty pages ...


1

Based on the further info and the fact that the raid controller doesn't have a battery installed I suggest you take a completely different path. The controller you have - B120i - is not a full hardware RAID, it's more like a hardware assisted software RAID. There is very little advantage in using these "FakeRAID" cards over pure software RAIDs. It's not any ...


1

According to the kernel.org RAID wiki: After the new disk was partitioned, the RAID level 1/4/5/6 array can be grown that is, RAID-0 is not eligible for growing. You will need to backup all the data, recreate the array from scratch, and restore from backups.


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I couldn't find a way to make the server itself tell the Windows installer how to see the disk, but by talking to @joeqwerty in the comments I ended up following this course, which worked: Download the latest drivers from Dell: I did that from my product's support page, going on "Drivers & Downloads", category "Driver for OS Deployment". There was one ...


1

In terms of sequential performance, for both read and write, RAID10 of four drives behaves exactly as RAID0 of two drives. You are seeing that yourself with just two drives blinking. That is the expected behavior. It is so, because RAID1 in standard configuration does not increase sequential read speed. (been wondering about the same thing about 11 years ...



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