Technical data

Table 4–18: Front Panel Switch Functions in the Status Mode
Switch Function in the Status Mode
1 Displays the errors for the density read. If no errors occurred, the message NO ERRS
appears in the display.
2 May be used instead of switch 1 to view 1600 bpi status. Displays the errors for 1600
bpi density in the sequence shown in Table 4–19. If no errors occurred, the message
NO ERRS appears in the display. Do not press if 6250 bpi tape was read, it will cause
unpredictable results.
3 May be used instead of switch 1 to view 6250 bpi status. Displays the errors for 6250
bpi density in the sequence shown in Table 4–19. If no errors occurred, the message
NO ERRS appears in the display. Do not press if 1600 bpi tape was read, it will cause
unpredictable results.
4 Exits the Status Mode and re-enters the Read Mode, or exits the service aid, depending
on whether switch 4 or 5 enabled the Status Mode.
5 No function.
Once switch 1, 2 or 3 is pressed to view the status, switch 1 must be pressed to display the
number of errors and retries in the sequence shown in Table 4–19. Once the above sequence
is entered, it cannot be exited until all of the error messages have been read, and the STATUS
prompt is reached. During the sequence, only switch 1 functions to step through the sequence.
From the STATUS prompt, switch 4 then functions as explained in Table 4–18 for the Status
Mode.
Table 4–19: Error Messages
Message Explanation
HD En Number (n) of hard errors
CR E n Number (n) of corrected errors
CRC E n Number (n) of cyclical redundancy check errors
WT T n Number (n) of blocks that required write retries
RD T n Number (n) of blocks that required read retries
WT C n Number (n) of blocks that required write retries
RD C n Number (n) of blocks that required read retries
TRK ERRS=nK Total number (n) of read and write errors for all tracks
TKt=n Total number (n) of read and write errors for tracks (t) 0 through 7 and P, only
tracks with errors are displayed
TOT 1600 n Total of all errors for this density. Only shown from the total prompt.
TOT 6250 n Total of all errors for this density. Only shown from the total prompt.
4–20 Troubleshooting