Technical data

Table 4–13: 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.
4.5.3.2 Service Aid 212 (Read/Write Data)
NOTE
To perform Service Aid 212, the tape reel must have a write-enable ring
installed.
Service Aid 212 writes data until EOT, reads reverse back to BOT, then repeats this cycle
until the service aid is exited. No error correction is done.
The block size, the data pattern, and the density of the data written to the tape are selectable
parameters for this service aid. The block size ranges from 1 byte to 8192 bytes in 1-byte
increments, then to 64 kilobytes in 8-kilobyte increments. The data pattern can be set to all
zeros, all ones, 55, AA, or an incrementing pattern that starts at one. Any density available
on the drive can be selected. The default for block size is 16, data pattern is incrementing,
and density is 1600 PE.
During this service aid, the front panel switches function as described in Table 4–14:
Troubleshooting 4–17