1> use master
2> go
1> exec sp_dboption sybsecurity,'single user',true
2> go
Msg 17435, Level 16, State 1:
Server 'SRVNAME', Procedure 'sp_dboption', Line 573:
The 'single user' option is not valid for the 'sybsecurity' database.
(return status = 1)

1> use sybsecurity
2> go
1> dbcc tablealloc(syslogs,full,fix)
2> go
Server Message:  Number  12947, Severity  16
Server 'SRVNAME', Line 1:
Syslogs free space is currently 1763862 pages but DBCC counted 130552 pages. This descrepancy may be spurious if this count was done in multi-user mode. Please run DBCC TABLEALLOC(syslogs, full, fix) to correct it. 
Table Corrupt: Extent id 842176 on allocation pg# 841984 has objid 8, indid 0, and used bit on, but reference bit off. 
The 'fix' option has been ignored for this command. To use the 'fix' option with system tables, run the command from the database where the table is located. The database must be in single user mode. 
*************************************************************** 
TABLE: syslogs OBJID = 8 
PARTITION ID=8 FIRST=830267 ROOT=830267 SORT=0 
Data level: indid 0, partition 8. 1 Data pages allocated and 1 Extents allocated. 
TOTAL # of extents = 1 
Alloc page 830208 (# of extent=1 used pages=5 ref pages=2314885530279477249) 
Alloc page 841984 (# of extent=1 used pages=1 ref pages=2314885530279477248) 
Total (# of extent=2 used pages=6 ref pages=1) in this database 

 Statistical information for this run follows: 
Total # of pages read = 1  
Total # of pages found cache = 1  
Total # of physical reads = 0  
Total # of saved I/O = 0  
Size of I/O used = 8 pages 
DBCC execution completed. If DBCC printed error messages, contact a user with System Administrator (SA) role.