I wil have to disagree with about ram. busy trying to clone my root
partition with dd to a usb hard drive. booted with jaunty 32bit live cd
and started the process with dd if=/dev/sda3 of=/media/disk/image.img
conv=sync,noerror bs=64K. 1st 10GB flew by at 25-30MB/s then started
slowing down to 10MB/s till about 25GB and then crawls at 3MB/s. stopped
it around 53GB after about 5 hours and tried turning off USB legacy
emulation in the BIOS as suggested by some other posts. started the
process again and the EXACT same thing happened. ram usage is not a
factor at all:
total used free shared buffers
cached
Mem: 3095648 1243452 1852196 0 763720 264116
-/+ buffers/cache: 215616 2880032
Swap: 1638588 0 1638588
rebooted to switch the sata hard drive to ahci. could not boot ubuntu at
all so thats not a workaround. had the same issue on my desktop. not
sure how you are supposed to get any ubuntu booted in ahci mode.
also tried manually mounting the usb drive and also made no difference.
in fact i have tried this when i was still running hardy and it made no
difference then. so as far as I am concerned there is no workaround for
this problem at all. started the clone last night at 11:30 and is still
running now at 9:30 and is only on 63GB. shocking.
This issue has been plaguing us since hardy and is frankly embarrassing for OSS
and Ubuntu.
This is not a medium bug IMO but should be marked as CRITICAL. Need to do
emergency clone of a hard drive you cannot expect someone to wait 12 hours for
something that should take 1 or 2 This bug was logged a year ago. what can be
done to fix it finally???
--
file transfers on USB disk are very slow
https://bugs.launchpad.net/bugs/197762
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