Every time chkdsk runs I get the error index $0 for file 25. This is a large file server so we really cannot bring the server down often. A couple weeks ago the power company scheduled a power outage to replace equipment so we brought everything down except this file server. I connected it to a generator and let the chkdsk run. It ran for about 5 hours and showed deleting file 25 for about an hour then writing file 25 for about 2 hours then continued to run with no more errors. After it finished I shut down the server and waited for the power to be restored. Brought the server online everything seemed fine. I have been receiving several errors "Ntfs(55) - The file system structure on the disk is corrupt and unusable. Please run the chkdsk utility on the volume Internal Storage Array.
Server 2008 R2 Enterprise
dual 2.27Ghz Xeon Processors
Dell R510 server
PERC RAID array 18.1 TB
RAID 6