Talk:ND-210628F: Difference between revisions
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repeated many, man times. I'm not sure why it says "Invalid argument!". | repeated many, man times. I'm not sure why it says "Invalid argument!". | ||
After all these attempts, there was a visible line on the coating of the floppy itself. I'm not sure, but I do not think it was there before I tried data recovery o this floppy. --[[User:Tingo|Torfinn]] ([[User talk:Tingo|talk]]) 20:42, 27 July 2016 (UTC) | After all these attempts, there was a visible line on the coating of the floppy itself. I'm not sure, but I do not think it was there before I tried data recovery o this floppy. --[[User:Tingo|Torfinn]] ([[User talk:Tingo|talk]]) 20:42, 27 July 2016 (UTC) | ||
Have you checked on the [http://www.classiccmp.org/dunfield/img/index.htm Disk/Image software archive] at classiccmp? /[[User:Roger|Roger]] ([[User talk:Roger|talk]]) 00:27, 29 July 2016 (UTC) | |||
Latest revision as of 00:27, 29 July 2016
Data recovery attempts
I have previously used dd_rescue successfully, but only on hard drives. My experience with data recovery from floppies is limited, and I worry about potential wear on the floppies, and on my floppy drive. But I used this floppy as a test, to see if I could recover the data on it. First i tried GNU ddrescue, since it is (supposedly) is improved compared to dd_rescue.
tingo@kg-t2$ ddrescue -n /dev/fd1 ./210628F01-XX-01D.image.5 ./210628F01-XX-01D.image.5.log Press Ctrl-C to interrupt Initial status (read from logfile) rescued: 0 B, errsize: 0 B, errors: 0 Current status rescued: 0 B, errsize: 1261 kB, current rate: 0 B/s ipos: 65536 B, errors: 1, average rate: 0 B/s opos: 65536 B, time from last successful read: 0 s Finished tingo@kg-t2$ ddrescue -n /dev/fd1 ./210628F01-XX-01D.image.5 ./210628F01-XX-01D.image.5.log Press Ctrl-C to interrupt Initial status (read from logfile) rescued: 0 B, errsize: 1261 kB, errors: 1 Current status rescued: 0 B, errsize: 1261 kB, current rate: 0 B/s ipos: 0 B, errors: 1, average rate: 0 B/s opos: 0 B, time from last successful read: 0 s Finished
Unfortunately, it looks like GNU ddrescue simply doesn't work on this system at all - it could not read even one record from the floppy.
So I tried dd_rescue. It did better - it managed to read data from the floppy, but it read even less than a simple 'dd' did. And it gave these errors:
dd_rescue: (info): ipos: 31290.5k, opos: 31290.5k, xferd: 31290.5k
* errs: 60661, errxfer: 30330.5k, succxfer: 960.0k
+curr.rate: 650kB/s, avg.rate: 265kB/s, avg.load: 15.2%
dd_rescue: (warning): /dev/fd1 (31290.5k): Invalid argument!
repeated many, man times. I'm not sure why it says "Invalid argument!". After all these attempts, there was a visible line on the coating of the floppy itself. I'm not sure, but I do not think it was there before I tried data recovery o this floppy. --Torfinn (talk) 20:42, 27 July 2016 (UTC)
Have you checked on the Disk/Image software archive at classiccmp? /Roger (talk) 00:27, 29 July 2016 (UTC)