安装cadence ic5141 usr5的时候提示下列错误

icyevilion

dd if=/home/eda/install/Update/CDROM1/IMAGES.DIR/FS.0 bs=20b
tar  tBf - /tmp 2>/tmp/tarlog31600 && cat - >/dev/null
148+1 records in
148+1 records out

Tape: 200706221130_IC5141L1P1_CD:1 Fileset: 39 Affecting: calcDoc05.10-s005
       dd if=/home/eda/install/Update/CDROM1/IMAGES.DIR/FS.39 bs=20b
tar  xpBf - -b1 2>/tmp/tarlog31636 && cat - >/dev/null
80+0 records in
79+0 records out
dd: I/O error
tar: Unexpected EOF in archive
tar: Unexpected EOF in archive
tar: Error is not recoverable: exiting now

SL-11: Error loading software ...
Refer to /tmp/load.msg2 for load log

这个是不是源文件的问题啊？我就在这上面下载的，如果真是那真的是坑爹啊。。。