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fsck.ext3: Device or resource busy on server with RAID after power outage

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http://serverfault.com – I am recovering Dell Poweredge R510 server running Scientific Linux 5.5 after an unexpected power outage. The server was set up by our previous system administrator (I'm a grad student). Upon reboot, I see the message: fsck.ext3: Device or resource busy when trying to open /dev/sdb1 File system mounted or opened exclusively by another program? /dev/sdb1 is the /home directory and consist of a Megaraid-controlled RAID5 consisting of 9x600 GB SAS disks. # megacli -AdpAllInfo -aALL Adapter #0 =============================================================== (HowTos)