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SCSI striped array failure |
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4D
Old Croc
Joined: 13 November 2008 Location: Winchester Status: Offline Points: 4364 |
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Topic: SCSI striped array failurePosted: 17 January 2011 at 9:54pm |
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win2k
adaptec 3 channel card set to striped array mode 3 Scsi drives one say fk you. any clues |
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DMZ. "The bass was intense. Girls were literally running up to stand next to the subs"
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The Builder
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Joined: 03 January 2010 Status: Offline Points: 3107 |
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Posted: 17 January 2011 at 10:04pm |
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Late and tired, but a striped array with no parity has no redundancy. Lose a drive, lose the data.
Unless I'm forgetting or the explanation is not as I read it.
Shagnasty will know this subject best...
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It just is.
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jonminns
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Joined: 13 April 2008 Location: United Kingdom Status: Offline Points: 1877 |
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Posted: 17 January 2011 at 11:09pm |
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Total loss i'm afraid unless there's some parity going on
This is where raid 5 wins
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4 ohms is for wimps
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shagnasty
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Joined: 30 July 2007 Location: Guildford, UK Status: Offline Points: 7683 |
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Posted: 17 January 2011 at 11:45pm |
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How failed is the drive, if you can get it to respin on another host adapter as a JBOD disk you may be able to plug it back onto the RAID card, load config from HDD and pull the data off.
Sometimes drives timeout on spin-up and get tagged shagged so removing all the physcial drives from the host, clear the array on host (flagged dead) and reconnecting all drives cause the HBA to reload config and if the disc spins up you could be able to lift the data.
I would do with a copy of Hiren's boot CD in the CDROM drive and a spare SATA or IDE HDD connected so you do pull the array back up you can instantly ghost the data to another drive...
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The Builder
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Posted: 18 January 2011 at 9:38am |
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Freezer trick comes to mind as well.
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jonminns
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Posted: 18 January 2011 at 7:06pm |
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I've never had any success with the freezer
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4 ohms is for wimps
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Mircea Bartic
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Joined: 18 February 2005 Location: Romania Status: Offline Points: 2589 |
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Posted: 18 January 2011 at 9:02pm |
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tell me more about the freezer
I repaired computers on the side for about 9 years and didn't come across this method |
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general manager & head designer at nexus-acoustics research
http://www.facebook.com/nexus.acoustics.research Ex Nexus_3 |
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The Builder
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Posted: 18 January 2011 at 10:05pm |
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Works in two ways, bearing failure on a drive, or overheating controller chip on drive.
Sealed in a bag, put in freezer:
What little lubrication that is left on drive spindle gets thicker, ergo drive spins true. Also everything contracts, shrinks in effect.
Broken chip on drive may work as it's super cold.
Old 2003 Western Digitals, Maxtor and IBM's going click crash usually respond well.
I recon I get away with about 4 in 10 like this, in the case of bearing type failure hanging the cold drive on its cable and swinging it about can also help.
OBVIOUSLY use the drive as a slave, not a boot, and be quick.
Article here, http://geeksaresexy.blogspot.com/2006/01/freeze-your-hard-drive-to-recover-data.html although he tries to boot. Edited by The Builder - 18 January 2011 at 10:07pm |
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Mircea Bartic
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Joined: 18 February 2005 Location: Romania Status: Offline Points: 2589 |
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Posted: 18 January 2011 at 10:08pm |
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interesting read
thanks |
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general manager & head designer at nexus-acoustics research
http://www.facebook.com/nexus.acoustics.research Ex Nexus_3 |
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