8.156 SFK (Perform a chkdsk on the active shadow file)

8.156.1 Function

The SFK command performs a chkdsk on the active shadow file(s).

8.156.2 Syntax

Descriptive

n]

Diagram

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n

8.156.3 Parameter

device

This specifies the device for which active shadow file a chkdsk is to be performed.

*

Specifiying an asterisk it is possible to perform a chkdsk for the active shadow files
of all dasd devices.

n

The optional check level to be performed (default is 2):

-1 devhdr, cdevhdr, I1 table

0 devhdr, cdevhdr, I1 table, I2 tables

1 devhdr, cdevhdr, I1 table, I2 tables, free spaces

2 devhdr, cdevhdr, I1 table, I2 tables, free spaces, trkhdrs

3 devhdr, cdevhdr, I1 table, I2 tables, free spaces, trkimgs

4 devhdr, cdevhdr, build everything else from recovery

Use the check level '4' only after making a backup and be prepared to wait a long
time!

8.156.4 Examples

Example 1:

Perform chkdsk level '2' for the shadow file of dasd device 0148.

HHC00013I Herc command: 'sfk 0148 2'

HHC00333I 0:0148 size free nbr st reads writes l2reads hits switches

HHC00334I 0:0148 readaheads misses

HHC00335I 0:0148 --------------------------------------------------------------------

HHC00336I 0:0148 [*] 21632514 0% 10 886 426 16 715 1523

HHC00337I 0:0148 79 25

HHC00338I 0:0148 D:/MVS/DASD/MVSRES.CCKD

HHC00339I 0:0148 [0] 21627652 0% 9 rd 884 20 15

HHC00340I 0:0148 D:/MVS/SHADOW/MVSRES_*.CCKD

HHC00341I 0:0148 [1] 4862 15% 1 rw 2 406 1

Figure 285: SFK command (chkdsk level 2)

Example 2:

Perform chkdsk level '4' for the shadow file of dasd device 0148.

HHC00013I Herc command: 'sfk 0148 4'

HHC00372I 0:0148 CCKD file 'D:/MVS/DASD/MVSRES.CCKD': trk[10320] recovered offset 0x1003 len 763

HHC00373I 0:0148 CCKD file 'D:/MVS/DASD/MVSRES.CCKD': 1 trk images recovered

HHC00377I 0:0148 CCKD file 'D:/MVS/DASD/MVSRES.CCKD': free space rebuilt

HHC00333I 0:0148 size free nbr st reads writes l2reads hits switches

HHC00334I 0:0148 readaheads misses

HHC00335I 0:0148 --------------------------------------------------------------------

HHC00336I 0:0148 [*] 21632514 0% 10 886 426 16 715 1523

HHC00337I 0:0148 79 25

HHC00338I 0:0148 D:/MVS/DASD/MVSRES.CCKD

HHC00339I 0:0148 [0] 21627652 0% 9 rd 884 20 15

HHC00340I 0:0148 D:/MVS/SHADOW/MVSRES_*.CCKD

HHC00341I 0:0148 [1] 4862 15% 1 rw 2 406 1

Figure 286: SFK command (chkdsk level 4)