Local drive configuration raid 5

Hello All

We have a HP dl180 with a P212 raid controller and 10 x 6tb WD red disks.
after a reboot it cant see the raid information so the controller say that all 10 drives are available
i just send the HP tech guy out the dore and he say that it is because the controler dont support the WD disks
(funny that it worked for many months) so he cant do anything :-(

i have tryed another controller and another cable.

Any way to get the data back :-(
nova-cAsked:
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KimputerCommented:
The HP Tech guy is trained for this. And he may very well be telling you the truth. Right now, the only way to get the data back is to send the WHOLE system out to a recovery lab. The fact that it's RAID5 means you will probably have to pay more, since the diagnostics and rebuilding will take quite a lot more from the lab (figuring out what's on the  disk, and how to rebuild it from the other disks). It will set you back probably at least a few thousand bucks.
rindiCommented:
For RAID you MUST always use enterprise class disks that have been certified by the server's manufacturer to work with their hardware. They usually have firmware adapted by the server manufacturer. Using any other disks is always a risk and naturally not supported by the server manufacturer.

In today's times with the very large disks you get, and their low prices (compared to a decade or so ago), RAID 5 is outdated and shouldn't be used anymore. RAID 5 is a risky RAID level, if a disk fails your data is at high risk. Besides that, with your very large disks a rebuild will take very long and during that time your remaining disks are at high stress which can cause further failures and a total loss of data. So in these modern times I would NEVER recommend using RAID 5 anymore. Use something like RAID 6 or some other RAID level which gives you better redundancy. RAID 5 was OK in the old days where the SCSI disks had capacities like 9, 18, 36, 74 or 146 GB, and were very expensive. With such low capacities you had to use a lot of disks in a RAID array to get some usable amount of storage, and as with RAID 5 you only lost one of the disks to RAID you got a maximum capacity with a minimum of disks. If a disk failed, it wouldn't take too long to rebuild because of the low capacity and so your risk of further failure during the rebuild wasn't as high then.

Why are you even considering recovery? Just create a new array (with certified disks), then restore your data from your backups. That is exactly what backups are for.

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nova-cAuthor Commented:
i'll tyr a recovery company then, i dont hav backup of 45tb of data
rindiCommented:
45 TB data and no backup??? The data can't be important then and paying thousands of $'s to recover unimportant Data wouldn't make any sense.

If the data is worth anything, you always have a good backup strategy in place.
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