Hi Andrew, Tried your suggestions. There's marginal improvement current rate increased to 32kb but alternates with 21kb which makes the average about 27kb too.
Initial status (read from logfile) rescued: 1702 MB, errsize: 0 B, errors: 0 Current status rescued: 1713 MB, errsize: 0 B, current rate: 21845 B/s ipos: 1713 MB, errors: 0, average rate: 27198 B/s opos: 1713 MB, time from last successful read: 0 s Both source and destination are attached externally thru USB. I did a hardware test with Seagate tool and it did not report any problem. regards, Ridz > Hi Ridz. > > Maybe try not specifying cluster size? > > You can interrupt the current run since you have a log file. Try running: > > ./ddrescue --v /dev/sdc /media/sde1/rescue.img /media/sde1/rescue.log > > Maybe using synchronous or direct may help (-vDd or -vd or -vD). Beyond > that, maybe it's a hardware issue. How are the source and destination > drive attached to the computer? > > Andrew > > > > > --- On Sun, 1/9/11, [email protected] <[email protected]> wrote: > > From: [email protected] <[email protected]> > Subject: Re: [Bug-ddrescue] Need help - ddrescue very slow - avg 27kb/s > To: [email protected], [email protected] > Received: Sunday, January 9, 2011, 5:16 PM > > Hi Andrew, > > Thanks for replying. I was initially recovering to an NTFS filesystem. The > average rate never went higher than 27kb. I've read that writing a large > file to NTFS filesystem can get progressively slower. Therefore, I > formated my recovery harddisk to ext3. However, there was no improvement - > the average rate is still 27kb and the current rate never go beyond 30kb. > > For the recovery harddisk, I had formatted it following the instructions > at > http://www.idevelopment.info/data/Unix/Linux/LINUX_PartitioningandFormattingSecondHardDrive_ext3.shtml > > Result of mount of the recovery harddisk: > /dev/sde1 on /media/sde1 type ext3 > (rw,nosuid,nodev,relatime,errors=continue,data=writeback) > > regards, > Ridz > > >> Hi Ridz. >> >> What do you mean by "I've formatted it to type 83". >> >> Did you just change the partition type or did you actually format the >> filesystem? I ask because writing a large file to an NTFS filesystem >> can >> get progressively slower. If you just changed the partition type, that >> will have no effect on the filesystem at all. >> >> In another terminal, type >> mount >> >> and post the output. That will show what devices are moutned and what >> filesystem is in use. >> >> Regards, >> >> Andrew Zajac >> >> >> >> --- On Sat, 1/8/11, [email protected] <[email protected]> wrote: >> >> From: [email protected] <[email protected]> >> Subject: [Bug-ddrescue] Need help - ddrescue very slow - avg 27kb/s >> To: [email protected] >> Received: Saturday, January 8, 2011, 9:59 PM >> >> Hi, >> >> Need help. I've ran ddrescue for a few days and it only rescued 10G out >> of >> 500GB. I've tried various command of ddresue but I find the average rate >> to be very slow as compared to other examples that I've read in the >> archives. I've installed ddrescue 1.8 and 1.13. I'm new to Linux and I'm >> not sure which version I'm using now. I've also formated my recovery >> harddisk to ext3 in hope that the speed would increase. But >> unfortunately >> it didn't. >> >> My hard disks configs are as follows: >> >> Problem drive : /dev/sdc 500GB NTFS - Windows detected it as >> unallocated >> Recovery drive: /media/sde1 1TB ext3 - I've formatted it to type 83 >> >> Command: >> >> ./ddrescue --no-split --cluster-size=1024 /dev/sdc >> /media/sde1/rescue.img >> /media/sde1/rescue.log >> >> Current status: >> rescued: 226559 kB, errsize: 0 B, current rate: 27594 B/s >> ipos: 226559 kB, errors: 0, average rate: 27431 B/s >> opos: 226559 kB, time from last successful read: 0 s >> >> Is there anyway for me to speed up the process. >> Please help. Thanks. >> >> regards, >> Ridz >> >> >> >> >> >> >> >> >> >> _______________________________________________ >> Bug-ddrescue mailing list >> [email protected] >> http://lists.gnu.org/mailman/listinfo/bug-ddrescue >> >> >> > > > > _______________________________________________ > Bug-ddrescue mailing list > [email protected] > http://lists.gnu.org/mailman/listinfo/bug-ddrescue > > > _______________________________________________ Bug-ddrescue mailing list [email protected] http://lists.gnu.org/mailman/listinfo/bug-ddrescue
