The In line Multidrive Exerciser exercises the various disk drives and tape drives attached to the HSC subsystetn. The exerciser is initiated upon demand. Drives to be tested are selected by the operator.
The exerciser issues random READ, WRITE, and COMPARE commands to exercise the drives. The results of the exerciser are displayed on the terminal from which it was initiated. The reports given by ILEXER do not provide any analysis of the errors reported, nor explicitly call out a specific FRU. This is strictly an exerciser.
This exerciser runs with other processes on the HSC subsystem. It is loaded from the RX33 or TU58 and uses the services of DEMON (Diagnostic Execution Monitor) and the HSC control software.
5.8.1 ILEXER System Requirements
In order for the ILEXER program to run, the following hardware and software items must be available.
1. HSC subsystem:
a. Console terminal b. P.io
c. K.sdi, K.sti, or K.si
d. Program, Control, and Data memories
e. RX33 (HSC70) system diskette or TU58 (HSC50 [modified] or HSC50) system tape load device
2. SDI compatible disk drive and/or
3. STI compatible tape drive 4. HSC system software, including:
a. HSC internal operating system b. DEMON
c. K.sdi/K.si microcode and/or
d. K.sti/K.si microcode e. SDI manager
and/or
f. STI manager or equivalent g. Disk functional code
and/or
h. Tape functional code i. Error Handler
j. Diagnostic Interface to Disk functional code and/or
k. Diagnostic Interface to Tape functional code
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Tests cannot be performed on drives if their respective interface is not available (K.sdi, K.sti, or K.si).
5.8.2 ILEXER Operating Instructions
Perform the following steps to initiate ILEXER (multidrive exerciser).
1. Type ICTRUVI.
2. The HSC responds with:
HSCxx>
3. Type RUN DXO:ILEXER
I
RETURNI.
DXO: refers to the HSC70 RX33 Drive 1. If running on an HSC50 (modified) or HSC50, DD1: refers to the HSC50 TU58 Drive 1.
The system loads the program from the specified local HSC load media (any appropriate media with the image ILEXER in an RTll format). When the program is successfully loaded, the following message is displayed:
ILEXER>D>hh:mm Execution Starting
Where hh:mm is the current time.
ILEXER then prompts for parameters. Mter all prompts are answered, the execution of the test proceeds. Error reports and performance summaries are returned from ILEXER.
When ILEXER has run for the specified time interval, reported any errors found, and generated a final performance summary, the exerciser concludes with the following message:
ILEXER>D>hh:mm Execution Complete
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DEVICE INTEGRITY TESTS
5.8.3 ILEXER Test Parameter Entry The parameters in ll..EXER follow the format:
PROMPT DESCRIPTION (DATATYPE) [DEFAULT]?
Where:
• PROMPT DESCRIPTION explains the type of information ll..EXER needs from the operator.
• The DATATYPE is the form ll..EXER expects and can be one of the following: drive, respectively. Terminate the unit number with a carriage return. ll..EXER attempts to acquire the specified unit via the HSC Diagnostic Interface. If the unit is acquired successfully, ILEXER entirely different set of prompts is presented. Typing CTRUZ at any time during parameter input selects the default values for the remaining parameters.
After a drive is selected and ll..EXER has both acquired the drive and brought it online, or if a nondefaultable parameter is encountered, the following prompts appear:
ILEXER>D>hh:mm Nondefaultable Parameter
Select up to 12 drives to be exercised: either all disk drives, all tape drives, or a combination of the two.
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DEVICE INTEGRITY TESTS
5.8.4 ILEXER Disk Drive User Prompts
The following prompts are presented if the drive selected is a disk drive.
ACCESS USER DATA AREA (YIN) [N]?
This value specifies the starting block of the area ll..,EXER exercises when the user data area is selected.
If block 0 is specified, ll..,EXER exercises beginning with the first LBN on the disk. write-protected until after any initial write has been completed.
SEQUENTIAL ACCESS (YIN) [N]?
The operator has the option of requesting all disk data access be performed in a sequential manner.
READ ONLY (YIN) [N]?
If answered N, the operator is asked for both a pattern number and the possibility of write only mode.
If the answer is Y, ll..,EXER does not prompt for write only mode, but only asks for a data pattern number if an initial write was requested.
DATA PATTERN NUMBER (0-15) (D) [15]?
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DEVICE INTEGRITY TESTS
The operator has the option of selecting one of 16 disk data patterns. Selecting data pattern 0 allows selection of a pattern with a maximum of 16 words. The default data pattern (15) is the factory format data pattern.
WRITE ONLY (YIN) [N]?
This option permits only Write operations on a disk. This prompt is not displayed if read only mode is selected.
DATA COMPARE (YIN) [N]?
If this prompt is answered with an N or a carriage return, data read from the disk is not checked: for example, disk data is not compared to the expected pattern. If the prompt is answered with a Y, the following prompt is issued. The media must have been previously written with a data pattern in order
to do a data compare.
-DATA COMPARE ALWAYS (YIN) [N]?
Answering a Y causes ll..EXER to check the data returned by every disk Read operation. Answering with an N or carriage return causes data compares on 15 percent of the disk reads.
NOTE
Selection of data compares significantly reduces the number of disk sectors transferred in a given time interval.
ANOTHER DRIVE (YIN) []?
Answering with a Y permits selection of another drive for exercising. This prompt has no default.
Answering with an N causes ll...EXER to prompt:
AVERAGE DISK TRANSFER LENGTH IN SECTORS (1 TO 400) [10]?
This prompt requests the selection of the average size (in sectors) of each data transfer issued to the disk drives. The default average disk transfer length in sectors is 10.
Once the preceding parameters are entered, ll...EXER continues with the prompts listed as global user prompts (Section 5.8.6).
5.8.5 ILEXER Tape Drive User Prompts
ll...EXER displays the following prompts if the drive selected is a tape drive.
IS A SCRATCH TAPE MOUNTED (YIN) [N]?
An N response results in a reprompt for the drive unit number. A Y response displays the next prompt.
ARE YOU SURE (YIN) [N]?
If the answer is N, the operator is reprompted for the drive unit number. If answered with a Y, the following prompts are displayed.
DATA PATTERN NUMBER (16-22) (D) [21]?
Seven data patterns are available for tape. The default pattern (pattern 21) is defined in Section 5.8.7.
DENSITY (1=800, 2=1600, 3=6250) (D) [2] ?
The response to this prompt is a 1, a 2, or a 3. Any other response is illegal, and the prompt is displayed again. The default is 2 or a density of 1600 bpi.
SELECT AUTOMATIC SPEED MANAGEMENT (YIN) [N]?