To clear selected entries from the error log, for example, all ssa0 errors,

  errclear -N ssa0 0
where the trailing zero is the number of days old an error entry needs to
be to get removed from the error log.  Zero says, remove all errors.

-------------------------------------------------------------------------------
Some errpt incantations ...

To get a summary display,
  errpt | more
e.g.
IDENTIFIER TIMESTAMP  T C RESOURCE_NAME  DESCRIPTION
AA8AB241   0415122798 T O OPERATOR       OPERATOR NOTIFICATION
05F97A32   0414184598 P H ssa0           ADAPTER ERROR
8AC43378   0413182998 T H scraid1        ADAPTER ERROR
F084AF4B   0413182998 U H scraid1        ARRAY COMPONENT FAILURE
89B52AA5   0411174198 P S console        SOFTWARE PROGRAM ERROR
...
The timestamp is mmddhhmmyy.
The "T" column is "Type", and can be I=Informational
                                     P=Pending
                                      =Performance
                                      =Permanent
                                     T=Temporary
                                     U=Unknown
The "C" column is "Class", and can be H=Hardware
                                      S=Software
                                      O=Operator Messages
                                      U=Undetermined

-------------------------------------------------------------------------------
To get a detailed display,
  errpt -a | more
e.g.
LABEL:          SCSI_ARRAY_ERR9
IDENTIFIER:     8AC43378

Date/Time:       Mon Apr 13 18:29:34 
Sequence Number: 441
Machine Id:      001106244C00
Node Id:         ar0073e0
Class:           H
Type:            TEMP
Resource Name:   scraid1
Resource Class:  adapter
Resource Type:   14102e00
Location:        04-03
VPD:             
     ...
Description
ADAPTER ERROR

Probable Causes
DASD DEVICE
CABLE
SCSI BACKPLANE
SCSI REPEATER

Failure Causes
DISK DRIVE
CABLE LOOSE OR DEFECTIVE
SCSI BACKPLANE
SCSI REPEATER

        Recommended Actions
        PERFORM PROBLEM DETERMINATION PROCEDURES

Detail Data
SENSE DATA
0000 0088 10F3 1604 1047 022A 07FD 13B5 10F3 1604 1047 022A 07FD 15AB 1005 0000 
1047 022A 07FD 15AC 4010 020A 4010 8908 07FD 15AC 1005 0102 1000 00F0 07FD 15AC 
0280 0000 0F47 FD0F 07FD 15CB 0000 0000 0000 0000 0000 0000 


-------------------------------------------------------------------------------
To isolate particular errors, you can
  errpt <-a> -j 05F97A32          To isolate on Identifier
  errpt <-a> -s 0414184598        To isolate on Starting Date (mmddhhmmyy)
  errpt <-a> -e 0414184598        To isolate on Ending Date (mmddhhmmyy)
  errpt <-a> -J SCSI_ARRAY_ERR9   To isolate on Label (shown in detailed display)
  errpt <-a> -N scraid1           To isolate on RESOURCE_NAME
  errpt <-a> -T PERM              To isolate on Type (TEMP is another example)
  errpt <-a> -d S|H|O             To isolate on Class