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6

First of all: to those, who still believes in "RAID0 has no hot spare". It could have a manual spare, done by human, who understand RAID levels and mdadm. mdadm is software RAID, so it could do a lot of interesting things. Credits to Zoredache for the idea! So, the situation: you have RAID0 array of two disks you would like to replace one of them without ...


5

Yes, this is possible. See: Can I convert a 1 disk RAID 0 to RAID 1? You're lucky that your striped array has worked until now. The process you'll go through is an "array transformation". Make sure your system has a battery-backed cache (BBWC) on the RAID controller. Add two more disks of equal or greater size than the existing disks. Install the HP ...


2

You should check your raid controller to see what the status is of the hard drives. If your green on all you should then go into disk management and check to see if the disks show. If they are there but show as foreign or inactive you'll need to either import them back or set them to active.


2

It looks like that is a custom build server. I presume the perc 6/i is on the motherboard. Assuming you have an appropriate pci-e slot available, I would just add a SATA controller HBA (one which can operate in IT mode, not a "Raid" one), and connect it to the backplane. I like LSI controllers and have been using the 9207-8i - I'm doing SAS (however they ...


2

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 ...


2

Bad block check must be done in the disk device itself, since you are using mdadm RAID you should stop the array and run checks on /dev/sda2 and /dev/sdb2. But before doing this, if you value your data I do recommend a backup, the possibility of losing the entire RAID-0 array exists.


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.


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

RAID 0 does not provide redundancy. So it does not support hot drive replacement.


1

As far as I know once you set up a RAID0 you cannot change one of the disks. You can take a backup and switch the disks and restore the backup. I would just RAID5 those 3 disks you have. That way in the future you can drop a disk and still rebuild it.


1

What I'd do in such a case is to simply use find, xargs and cat to read the entire disk content and if anything fails you lost data and will need to recover it. But this way you will immediately know which file lost data or which directory is lost. If you just use badblocks it will tell you a sector but not what to do to recover from the failure. find . ...


1

A good hardware controller shouldn't have a bottleneck between the controller and disks. You will certainly be bottlenecked by your SATA II onboard controller if you connect a SATA III SSD to it. You can't upgrade the onboard controller, assuming by onboard you mean that it's built in to the motherboard. If that's the case, then you'll need to buy a PCI ...


1

I had the same problem and I solved it by means of a little Linux FUSE program I wrote. It's named xraid and I put it on Sourceforge. For assembling your RAID: Download and compile xraid Run it: mkdir mnt ./xraid mnt 512 /dev/sdb /dev/sdc You now should be able to access your RAID under mnt/xraid.



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