I am getting the error message read error
while booting. After power up, I get a black screen with cursor at top, and after a while around 1:30 min. I get a read error
message at the top.
I shut down and restarted a couple of times, and it went back to normal. Was it a hard-disk error, or was it coming from Ubuntu?
The best way to check your hard disk for errors, is to download diagnose software from the hard disk vendor.
You can also install the program
smartmontools
andsudo smartctl -A /dev/sda
(change /dev/sda to fit your hard disk),sudo smartctl -t long /dev/sda
(will take some time, you can check the status of the self test runningsudo smartctl -l selftest /dev/sda
).If you mean
I/O read error
when reading from the harddisk then it probably is a hardware error. I would check the health of the drive (use smartmontools or Palimpsest Disk Utility).