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Old 30th April 2009, 09:01
heals1ic heals1ic is offline
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Unhappy Raid 1 failure but only old data left on remaining drive

I have setup raid 1 on my Fedora 10 box for data on a silicon image SiI 3112a pci card. I boot from a different raid 1 setup on another pci card.

I also have a LVG on the raid 1 data drive array. All partitions are formatted as ext3.

Recently I experienced a failure on one of my raid 1 data drives (each drive is 320GB). I removed the drive and booted back into my system and mounted the remaining drive as just a SATA drive. To my surprise the data I saw was was around 5 months old. For example the directory structure was old (I had deleted a number of folders ages ago that now reappear) and my accounting data file is last modified 5 months ago when I was using it last week.

Is there any explanation for this? Can the raid card be using some different file addressing structure that is not available when mounted non raid 1?

This is very scary as I will miss the last 5 months of data severely.
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Old 1st May 2009, 17:54
falko falko is offline
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That sounds as if you removed the wrong hard drive and as if the RAID array failed about 5 months ago.
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Old 12th May 2009, 09:43
heals1ic heals1ic is offline
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Yeah I am guttered if I can't get this data back.

Managed to mount the broken disk long enough to back up the data I wanted but it seems to be the same data as the non broken disk in the array.

It's almost as if a separate file index was used when the raid 1 was in tact and when the raid broke it reverted back to the original file index. This would have caused little issue when I copied the information to a backup disk after the raid broke because most of these files will not have been moved from when they were originally saved on the disk back when the disks were installed 5 months ago.

I just need to get access the files saved subsequently.

Maybe an intense file scan could locate these files?

Know any good recovery software?
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Old 6th January 2010, 13:57
Tommy Silver Tommy Silver is offline
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I must tell you from my experience that Raid recivery software is just a waste of time and money. I tried one of these some month ago, but didn't succeed recoverying even half of the data. then I googled raid recovery, and I found this website www.raid-recovery-online.com, they diagnosed my crisis for free and gave me a quate. I hardly suggest you to let them help you too
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