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ZAR ZAR-related questions. Digital image recovery; General data recovery (filesystems and RAIDs).

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  #1  
Old 26th March 2009
Michiel Michiel is offline
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Posts: 3
Default Raid 5 array gone after power failure

Hello,
My raid 5 array seemed to be crashed this morning, so after some recommendations i tried out ZAR,

First of all awsome application!

But,

I had a Raid 5 Configuration with 5x 500gb drive, 2 of those where hot spare, if i recall right.

I've put disk 1,2,3 in an other machine can't put more in as the pc doesnt profides me more disks in it. But as 4,5 where hot spare i guessed it should be ok.

So i started scanning with ZAR, and i was amaged by the result, directory tree was there, not complete but atleast someth.
I am recovering it now, but the data seems to be corrupt, PDF files are half, like they got cut off in the middle, and Word/Excel files are giving error messages about corruption.

Also, there seems to folders to be missing, well not some. quite alot...

Should i get a pc where i can attach all 5 disks in? should i change settings in ZAR?

Im running out of options, and really getting nervous about the dataloss...because ofcourse there is no recent back up!
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  #2  
Old 26th March 2009
Alexey V. Gubin Alexey V. Gubin is offline
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Default Re: Raid 5 array gone after power failure

First of all make sure you are running the latest version
http://www.z-a-recovery.com/zar-83-053.exe

Now, you have 5x 500GB drives.
You say two drives were hot spare, but that would not be a typical configuration.

See:
Two drives as hot spares leaves us with three drives in the array. The usable size of the array is thus 1 TB (1000 GB).
One hot spare drive would give four drives in the array and 1.5TB usable capacity.

Now this becomes a problem if you can only put three drives in, and I reckon you cannot determine which of five was hotspare.

I suggest you find a way to connect at least four drives. With any four (of five) drives connected, it should be possible to rebuild the array without knowing which of the drives was a hot spare (blank).
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Alexey
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  #3  
Old 26th March 2009
Michiel Michiel is offline
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Join Date: Mar 2009
Posts: 3
Default Re: Raid 5 array gone after power failure

Hello there,

I've managed to get a system where i could connect all 5 drives to, without a raid controller..

Also i changed settings to a full scan instead of quick...its scanning for bout 12hours now, and at 90% taking ages..hopefully with some more results now.
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  #4  
Old 26th March 2009
Michiel Michiel is offline
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Join Date: Mar 2009
Posts: 3
Default Re: Raid 5 array gone after power failure

Right, done with the scan,

Results where depressing, instead of some data there is nothing.
He can't find volumes, and if i just press the unknown he finds some.

But all in /Lostfiles and /Fragmented.

I changed all settings back to default, and give it another try here some lines from the log:

Quote:
Init done - logging
File management init done with a status of 88
NT 5.1.2600 Service Pack 3; 3326 MB RAM
Open physical drive 00000100 success, 465 GB : HDS725050KLA360 - Port 0, Bus 0, Target 0, LUN 0; maxLBA=976773168
Open physical drive 00000101 success, 465 GB : HDS725050KLA360 - Port 0, Bus 0, Target 1, LUN 0; maxLBA=976773168
Open physical drive 00000102 success, 465 GB : HDS725050KLA360 - Port 1, Bus 0, Target 0, LUN 0; maxLBA=976771055
Open physical drive 00000103 success, 232 GB : WDC WD2500AAJS-07M0A0 - Port 2, Bus 0, Target 0, LUN 0; maxLBA=488395055
Open physical drive 00000104 success, 465 GB : HDS725050KLA360 - Port 2, Bus 0, Target 1, LUN 0; maxLBA=976773168
Open physical drive 00000105 success, 465 GB : WD 5000AAV External; maxLBA=976773168
Open physical drive 00000100 success, 465 GB : HDS725050KLA360 - Port 0, Bus 0, Target 0, LUN 0; maxLBA=976773168
Open physical drive 00000101 success, 465 GB : HDS725050KLA360 - Port 0, Bus 0, Target 1, LUN 0; maxLBA=976773168
Open physical drive 00000102 success, 465 GB : HDS725050KLA360 - Port 1, Bus 0, Target 0, LUN 0; maxLBA=976771055
Open physical drive 00000103 success, 232 GB : WDC WD2500AAJS-07M0A0 - Port 2, Bus 0, Target 0, LUN 0; maxLBA=488395055
Open physical drive 00000104 success, 465 GB : HDS725050KLA360 - Port 2, Bus 0, Target 1, LUN 0; maxLBA=976773168
Open physical drive 00000105 success, 465 GB : WD 5000AAV External; maxLBA=976773168
Starting RAID5 parity check
Parity detected in 2% of 200 tests
One drive will be rebuit for RAID5 tests
Raw scanner starting on disk 0100 from LBA 0 to LBA 976773168
Raw scanner starting on disk 0101 from LBA 0 to LBA 976773168
Raw scanner starting on disk 0102 from LBA 0 to LBA 976771055
Raw scanner starting on disk 0104 from LBA 0 to LBA 976773168
QS CFG INHIBIT
QS CFG INHIBIT
QS CFG INHIBIT
QS CFG INHIBIT
Open physical drive 00000100 success, 465 GB : HDS725050KLA360 - Port 0, Bus 0, Target 0, LUN 0; maxLBA=976773168
Open physical drive 00000101 success, 465 GB : HDS725050KLA360 - Port 0, Bus 0, Target 1, LUN 0; maxLBA=976773168
Open physical drive 00000102 success, 465 GB : HDS725050KLA360 - Port 1, Bus 0, Target 0, LUN 0; maxLBA=976771055
Open physical drive 00000103 success, 232 GB : WDC WD2500AAJS-07M0A0 - Port 2, Bus 0, Target 0, LUN 0; maxLBA=488395055
Open physical drive 00000104 success, 465 GB : HDS725050KLA360 - Port 2, Bus 0, Target 1, LUN 0; maxLBA=976773168
Open physical drive 00000105 success, 465 GB : WD 5000AAV External; maxLBA=976773168
Open physical drive 00000100 success, 465 GB : HDS725050KLA360 - Port 0, Bus 0, Target 0, LUN 0; maxLBA=976773168
Open physical drive 00000101 success, 465 GB : HDS725050KLA360 - Port 0, Bus 0, Target 1, LUN 0; maxLBA=976773168
Open physical drive 00000102 success, 465 GB : HDS725050KLA360 - Port 1, Bus 0, Target 0, LUN 0; maxLBA=976771055
Open physical drive 00000103 success, 232 GB : WDC WD2500AAJS-07M0A0 - Port 2, Bus 0, Target 0, LUN 0; maxLBA=488395055
Open physical drive 00000104 success, 465 GB : HDS725050KLA360 - Port 2, Bus 0, Target 1, LUN 0; maxLBA=976773168
Open physical drive 00000105 success, 465 GB : WD 5000AAV External; maxLBA=976773168
Open physical drive 00000100 success, 465 GB : HDS725050KLA360 - Port 0, Bus 0, Target 0, LUN 0; maxLBA=976773168
Open physical drive 00000101 success, 465 GB : HDS725050KLA360 - Port 0, Bus 0, Target 1, LUN 0; maxLBA=976773168
Open physical drive 00000102 success, 465 GB : HDS725050KLA360 - Port 1, Bus 0, Target 0, LUN 0; maxLBA=976771055
Open physical drive 00000103 success, 232 GB : WDC WD2500AAJS-07M0A0 - Port 2, Bus 0, Target 0, LUN 0; maxLBA=488395055
Open physical drive 00000104 success, 465 GB : HDS725050KLA360 - Port 2, Bus 0, Target 1, LUN 0; maxLBA=976773168
Open physical drive 00000105 success, 465 GB : WD 5000AAV External; maxLBA=976773168
Starting RAID5 parity check
Parity detected in 100% of 200 tests
Raw scanner starting on disk 0100 from LBA 0 to LBA 976773168
Raw scanner starting on disk 0101 from LBA 0 to LBA 976773168
Raw scanner starting on disk 0102 from LBA 0 to LBA 976771055
Raw scanner starting on disk 0104 from LBA 0 to LBA 976773168
ALERT!: MFT entry with alloc size 0 was encountered during identification; Base record ID 8D9E0000
ALERT!: MFT entry with alloc size 0 was encountered during identification; Base record ID 8D9F0000
ALERT!: MFT entry with alloc size 0 was encountered during identification; Base record ID 1F4F0000

The whole log is covered with Alerts like that is that normal? or what should i do?
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  #5  
Old 27th March 2009
Alexey V. Gubin Alexey V. Gubin is offline
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Default Re: Raid 5 array gone after power failure

What size the full log file is? Is it possible that you ZIP it and email to me at development@z-a-recovery.com (the mailbox accepts about 10 MB max)?

Massive amount of alerts in earlier stages is not really a problem, but I need the full log file, not just excerpts.
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Alexey
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