SQL server ne démarre plus

Bonjour,

J'ai un PC qui est relié a une machine le problème est que SQL server ne veut plus fonctionner

voici les LOGS :

2012-10-31 09:21:03.95 kernel Copyright (C) 1988-1997 Microsoft Corporation.
2012-10-31 09:21:03.95 kernel All rights reserved.
2012-10-31 09:21:03.95 kernel Logging SQL Server messages in file 'C:\MSSQL7\log\ERRORLOG'.
2012-10-31 09:21:03.96 kernel initconfig: Number of user connections limited to 32767.
2012-10-31 09:21:03.96 kernel SQL Server is starting at priority class 'normal'(1 CPU detected).
2012-10-31 09:21:03.96 kernel User Mode Scheduler configured for thread processing
2012-10-31 09:21:04.98 server Directory Size: 8095
2012-10-31 09:21:04.98 spid1 Using dynamic lock allocation. [500] Lock Blocks, [1000] Lock Owner Blocks
2012-10-31 09:21:04.98 spid1 Starting up database 'master'.
2012-10-31 09:21:04.98 spid1 Opening file C:\MSSQL7\data\master.mdf.
2012-10-31 09:21:04.98 spid1 Opening file C:\MSSQL7\data\mastlog.ldf.
2012-10-31 09:21:05.06 spid1 Loading SQL Server's Unicode collation.
2012-10-31 09:21:05.07 spid1 Loading SQL Server's non-Unicode sort order and character set.
2012-10-31 09:21:05.21 spid1 Starting up database 'model'.
2012-10-31 09:21:05.21 spid1 Opening file C:\MSSQL7\DATA\model.mdf.
2012-10-31 09:21:14.10 spid1 Error: 823, Severity: 24, State: 1
2012-10-31 09:21:14.10 spid1 I/O error 23(Data error (cyclic redundancy check).) detected during read of BUF pointer = 0x113c0cc0, page ptr = 0x20086000, pageid = (0x1:0x9), dbid = 3, status = 0x801, file = C:\MSSQL7\DATA\model.mdf..
2012-10-31 09:21:14.15 spid1 Database 'model' cannot be opened because some of the files could not be activated.

par contre je n'ai aucune expérience dans le SQL et en plus l'ordinateur est en anglais (ce qui est pas très pratique) donc SVP pouvez vous me détailler si vous avez la solution

Merci bien

Cordialement