RAID Reconstruction on PERC 6i

[macdaodus]

Good day All, I have a broken RAID on Dell Server with PERC 6i Controller. There are 4 600GB SAS HDD on it, though one broke down 3 weeks ago while the server works on degraded mode. Few days back one of the 3 hdd is down so server not able to come up. I have tried to re-construct though I dont have all the details, with a RAID 5, 64Bit Block Size and Number of Rows at about 16/32/64, I get some data that appears fine but the heavy files about 1MB does not seem to work fine.

Kindly help with support. I will really appreciate.

Thank you.

[Dmitri]

How many drives or images you're using to reassemble the RAID?

If I got your description right and you're trying to reconstruct a 4 drives RAID5 having only two healthy drives, it isn't going to work. You need to get an image of one of the failed drives first, preferably the one, which failed recently. RAID 5 is capable to tolerate only one lost hard drive.

Otherwise (if you didn't change default PowerEdge settings), your estimate of files about 1MB being intact will be unduly optimistic.

[macdaodus]

Thank you for your response. I was lucky to have the 4 drives imaged. I tried using the last 3 and at some other times used the 4 drives but I see the data structure but with some tweaks the small files came up fine but the large data could not open. There were some very large hard drive showing 0bytes. Thank you

[Dmitri]

I tried using the last 3...

This is the proper way to go.

the small files came up fine but the large data could not open.

Assuming you do everything correctly, the system is yours, so you know all the parameters and since the array is rather small, it's unobvious what can be wrong.
Are you sure no one has tried to "recover the data" by performing some kind of rebuild on the server?

If you haven't sorted this out yet, we can check this RAID remotely.

There were some very large hard drive showing 0bytes.

And I didn't understand this at all.

[macdaodus]

I tried using the last 3...

This is the proper way to go.

the small files came up fine but the large data could not open.

Assuming you do everything correctly, the system is yours, so you know all the parameters and since the array is rather small, it's unobvious what can be wrong.
Are you sure no one has tried to "recover the data" by performing some kind of rebuild on the server?

If you haven't sorted this out yet, we can check this RAID remotely.

There were some very large hard drive showing 0bytes.

And I didn't understand this at all.

Thank you for your response. It has not been sorted out yet. Though I learnt someone tried to rebuild with a drive that did not finish up. When will you be able to have time for the remote login.

Thank you friend.