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PERC 5/i RAID Card: Tips and Benchmarks - Page 710

post #7091 of 7276
Quote:
Originally Posted by kithylin View Post

It's based on -ALL- older computers that do not have a UEFI Bios. This is a industry-wide bios limitation of all older machines, desktop, server, consumer, dell, hp, everything. Nothing older can boot on a 2TB+ hard drive, or partition.

With the PERC 5/i, it's limitation is not on partition size but 2TB physical disks per connector. So it supports 8 hard drives, at 2TB each would be 16 TB total, 15 TB with Raid-5. Or 8 GB with RAID-10. I would strongly not suggest creating an array that large without at least RAID-6 however (which the PERC 5/i does not support). Mainly because your rebuild times on a 15TB array is just so long and the chance of a URE (UnRecoverable Error) is high with long rebuild times.

What you can do however, is use 8 physical drives, 2TB each, and then create two arrays in the DELL PERC BIOS. One for like, 100GB - 256 GB or so, for OS install and BOOT, and then create a second array with the remaining capacity. This is what I do with my PERC 6/i (And did it before with a 5/i) in my file server. And this is one way to "Get around" the old-system-BIOS 2TB limit.

So what you're saying is i cannot boot to a partition larger than 2tb, yes? But it has no problem seeing such partitions once in the OS? Because that's what i want to know

I planned to boot onto a separate disk and use the array as storage
post #7092 of 7276
Quote:
Originally Posted by NormantheOwl View Post

So what you're saying is i cannot boot to a partition larger than 2tb, yes? But it has no problem seeing such partitions once in the OS? Because that's what i want to know

I planned to boot onto a separate disk and use the array as storage


It depends on the OS and partition type you use of course, but that should be the case, yes. FAT32 I think only does 2TB (I might be wrong there) but I don't know what the upper limit on NTFS is, but I know it's at least capable of up to 128 TB, I've seen that in production servers even in 2008.

I don't know what limits linux maxes out at, google should help there.

Booting to a separate disk does not protect your boot partition from a drive failure by the way. But if you make two raid5 arrays on the PERC however, like I suggested.. 100GB for OS, 2nd array for storage, then both OS and storage are both protected from disk failure, is why I suggested it.
post #7093 of 7276
I have used Perc 5i for some years with out any issue, but some weeks ago one of the RAID was degraided...
and now I have problem to add the disc to the RAID again, it give status that there are NO ERRORS with the disc...

But its give the drive status "Foreign", please see attached pictures.





I have played with the menu etc.. But I cant firgure out how to add the disc to the RAID, please
advise.

Thank you.
post #7094 of 7276
Have you tried to clear the configuration from the disc using F2? You could also try to clear it in Windows (if possible) using the LSI Megaraid utility.
post #7095 of 7276
I have tried F2, only option is offline / online, rest is dark grey.

I have not tried to LSI Megaraid utility, Can I install the hard drive to a random computer and install LSI Megaraid utility?
Or must I have raid controller installed on the computer, you see that I havent windows on the computer where the controller is installed....
post #7096 of 7276
You need ot use the utility on the same PC as the controller card. You could try formatting the drive outside of the util.
post #7097 of 7276
okey,

I will try to take the disc out and format in another computer, if these not work, i will use a extra disc and install windows on the computer.
post #7098 of 7276
Quote:
Originally Posted by gordone View Post

okey,

I will try to take the disc out and format in another computer, if these not work, i will use a extra disc and install windows on the computer.

I've run in to this before with the PERC series of cards. You can't pull the same disc out and replace it into the array. Once it's become flagged as defective you have to replace it with a physically different, separate disk or it won't rebuild.
post #7099 of 7276
I connected a new drive to the computer where I installed Windows7 and MSI mega store, I was then abel to rebuild the RAID with the disc....

Hoever after then the Controller started a initialize process for many hours, I tried to boot up when these process was ongoing,
but got many weird issue... and the linux reported fault on the file system.... etc...

I don`t understand what happend here?

I have now formated everything and installed eveything from scratch.. but these shouldent be the way doing it...
post #7100 of 7276
This is why you don't re-use the same disk when it encounters an error during RAID.... it's likely led to widespread system corruption now. frown.gifworriedsmiley.gif
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