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View Full Version : I/O error on external hard drive


Slacker
01-16-2006, 08:22 PM
My roomate and I decide to upgrade our server with a new TB RAID 5 array. I had 1 of the 400GB drives in my desktop for about a month until I could afford 2 more and the RAID card. I transferred the data from there on to my desktop and a 250GB external drive. Unfortunately both seem to have shit themselves since then. My old 160GB RAID 0 array in my desktop is fucked but there wasn't too much on there, one of the drives has been clicking for weeks apparently (over Christmas Break when I was gone) But that's not my main problem.

The 250GB external drive shows up in Windows but it just says local disk, and if I try and access it after a minute or two it will finally say "I/O error" I've had a similar drive for a year now and encountered this problem a few times before. Usually it meant format and start over, however the last time I had Ontrack Easy Recovery Pro and I was able to salvage almost all my data. I've tried running it on this drive with limited success. I've tried all the options and RAW recovery seems to be working the best. But with every option it still gets to one file at one block and just sits there. The remaining time continues to go up but it doesn't move to another block for about a half hour where it does the same thing. It's displaying the message "Error encountered while scanning partion" It's at about an hour now, it got to this file within 5 minutes but so far it hasn't moved on.

When I ran some diagnostics on the disk it said "Error count exceeded" all the errors being I/O errors I believe.

So has anyone encountered a similar situation or have any advice? None of the data is crucial, mostly TV shows and other digital media but it's taken me a long time to collect all this and I hate to lose it without putting up a fight.

Slacker
01-17-2006, 02:25 AM
I think I've figured out the problem. Normally the recovery process seems to hang on file #345 but after and hour or so it moves on to #46 and after another hour or two #347. I think the fact that I was transferring multiples files at once caused a lot of frgmentation so in order to reconstruct files that are several hundred mb each it has to go through most of the drive thousands or tens of thousands of times. Unfortunately at this rate it's going to take about 2 weeks. I'm only 4 hours in and it already says 300+ hours remaining, and that number keeps climbing.

I think I'm gonna defrag all my other hard drives now to prevent something like this from happening again.