8.155 SFD (Display shadow file statistics)

8.155.1 Function

The SFD command displays statistical information about the specified shadow file(s).

8.155.2 Syntax

Descriptive

Diagram

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8.155.3 Parameter

device

This specifies the device for which shadow file statistics will be written to the log
file.

*

Specifying an asterisk it is possible to create statistical output for all dasd devices
that have shadow files.

8.155.4 Examples

Example 1:

Display statistical information for the shadow file of dasd device 0148.

HHC00013I Herc command: 'sfd 0148'

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% 10 885 424 15 715 1522

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 1 404 0

Figure 284: SFD command

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!