LIMIT Control Statement

The LIMIT control statement works differently for each of the product groups.

Important: The LIMIT control statement only applies to the system exception report series.

The LIMIT control statement has the following format for 33XX DASD:

LIMIT dasd,keyword[,keyword…]

dasd

Represents the device type designation for DASD products. dasd can be one of the following generic product types:

Product type
33XX	3370
3310	3375
3330	3380
3340	3830
3350	3880

Note: 3340 includes 3344.

33XX is the general device type designation for all the listed direct access devices and control units. When you code 33XX on a LIMIT control statement, you are requesting that the limits apply to all devices of the general type.

Important: The LIMIT control statement is not valid for the following devices and storage controllers:

Device/Storage Controller
0671	9332	9341
3390	9335	9343
9313	9336	9345

keyword

Represents one or more DASD product-dependent keyword parameters with the associated numeric limits.

You can set minimum thresholds for different kinds of temporary errors or events using the keyword values listed here:

TO SET LIMITS FOR	USE KEYWORD
Seek errors	SKS=nnnn
Read errors	RD=nnnn
Bus out parity errors	B=nnnn
Equipment checks	EQUCHK=nnnn
Check data	C=nnnn
Invoked offsets	I=nnnn
Diskette checks	D=nnnn
Overruns	OVRN=nnnn
All not otherwise specified	ALL=nnnn
Note: nnnn can range from 1 to 9999; it requires no leading zeros.

Not all the keywords are valid for every device type. The following table shows the valid error type keywords for each of the 33XX DASD device types:

DEVICE TYPE	SKS	RD	B	EQUCHK	C	I	D	OVRN	ALL
3310	X	X		X	X				X
3330	X	X		X					X
3340	X	X		X					X
3350	X	X		X					X
3370				X	X	X			X
3375				X		X			X
3380				X		X			X
3830			X	X			X	X	X
3880			X	X			X	X	X
33XX	X	X	X	X	X	X	X	X	X

Notes:

If you do not specify a number for nnnn, EREP uses a default value of 01 applying no limits to temporary errors. So all errors of that type are included in the subsystem exception report.
When you set limits on temporary errors EREP excludes those errors that do not equal or exceed the LIMIT control statement values. For example, if you code:
```
LIMIT 3830,EQUCHK=5,OVRN=10
```
the DASD subsystem exception report shows temporary equipment checks and overrun errors for a 3830 control unit only if there are 5 or more equipment checks or 10 or more overruns recorded against the device.
When you specify 33XX or ALL on a LIMIT control statement, EREP only uses the valid keywords for each device type included.
EREP ignores the ALL values on any LIMIT control statements that follow a 33XX statement on which ALL is specified. For example:
```
LIMIT 3330,SKS=5,ALL=10
LIMIT 33XX,ALL=15
LIMIT 3340,RD=5,ALL=20
```
EREP limits the 3330 using the values in the 3330 statement, and limits all other DASD using the value in the 33XX statement. It ignores the ALL value in the 3340 statement, because the 33XX statement takes precedence. If you need the ALL value for 3340s, put that LIMIT control statement before the one for 33XX. For example:
```
LIMIT 3330,SKS=5,ALL=10
LIMIT 3340,RD=5,ALL=20
LIMIT 33XX,ALL=15
```
Now EREP limits the 3330 using the values in the 3330 statement, the 3340 using the values in the 3340 statement, and all other DASD using the value in the 33XX statement.
Only one LIMIT control statement is allowed for the general device class of 33XX.