麻煩幫我看這是正常嗎?

General Information
Drive: JLMS XJ-HD166S
Firmware: DS1E
Disc: DVD+R (YUDEN000 T02)
Selected speed: Maximum
PI errors
Maximum: 877
Average: 136.80
Total: 1840379
PI failures
Maximum: 10
Average: 1.28
Total: 68233
PO failures: n/a
Jitter: n/a
Scanning statistics
Elapsed time: 9:16
Number of samples: 100341
Average scanning interval: 1.27 ECC
Glitches removed: 0

那個pi errors average 是不是太高啦???