Totally forgot the start args: ddrescue -f -n -v -b 4096 /dev/sda /dev/sdc /ddrescue/rescue.log
2016-06-17 10:58 GMT+02:00 Hendrik Müller <[email protected]>: > Hello, > I'am currently in the process of a poor man's LSI raid data recovery. > After a power supply failure I had to replace the head stack assembly of > the drive (Western Digital Red 3TB). > The drive is now working again but I have the problem that ddrescue 1.21 > is copying with ~300kB/s for the first hours and then suddenly drops to > ~1000B/s. > Speed stay at this rate for ever, I had running this for over a week. > However when interrupting ddrescue and start again immediately speed is > again at ~300kB/s for ~1 hours and then drops again. > It is not always exactly an hour, sometimes it already happens after 30 > minutes, sometimes after 3 hours. > Anyway, the pattern is that after interrupting and starting again there is > "full speed" again (drive is powered on the while time, no interrupt). > > First I tough that it might be because of my setup (Raspberry Pi 3, latest > Raspbian + Firmware, two ASM1053 USB to SATA adapter) but the same happens > on a regular x86 machine running SystemRescueCd and directly connecting the > drives via SATA. > I compiled ddrescue 1.21 in both cases by myself. > > Any idea what could be the problem here? > _______________________________________________ Bug-ddrescue mailing list [email protected] https://lists.gnu.org/mailman/listinfo/bug-ddrescue
