On Sunday 19 February 2006 16:21, Eben King wrote:
> So my friend D brought me a dead USB HD. 160 GB, about half full (he
> said). XP hemmed and hawed when the drive was plugged in and wouldn't show
> its contents. So I popped it on my box (Linux, natch) and got 67 GiB of
> files from it, in several big tar files. Yay Linux. Took over two days,
> because every time there was an error, it stopped and waited (for what?
> The error to fix itself?) for 5.5 minutes (I timed it). Boo Linux.
What error?
> I tried running two tar processes at the same time, reasoning that it was
> using well under half the bandwidth (maybe 950 K/s), therefore the USB
> controller wasn't the bottleneck. Whenever there was an error, _both_
> processes would stop and wait. Even when there wasn't, the rate was about
> 1/3 of what one would do, so it was faster to run them serially. Boo Linux
> #2.
Eh? I thought you were talking to a drive that's suffering from a physical
failure? How fast would you like damaged media to be?
> Now I've got everything I can get, and it's time to put it back. NTFS
> writing is unreliable and new, so I chose FAT (vfat). Had to make 3
> primary + virtual partitions, as XP's formatter won't make a 128 GiB FAT
> partition (W98's will, but I can't get the drive to show up in W98).
Onto the damaged disk?
> Copying to vfat is VERY slow -- in 6.5 hours it's written 11.3 GiB, which
> is about 500 KiB/s. That's from an uncompressed tar file. It's slower on
> big files, pausing for many seconds in the write.
What's the output from `dmesg`? The console?
> What can I do to speed this up? I have half a mind to create a big file,
> format it ext[23], loopback mount it, extract the tar files to it, export
> it via Samba, mount it from an XP laptop over wifi, and restore it THAT
> way. I'm afraid that's more trouble than it's worth.
<snip>
Write the data back to a disk that isn't failing?
--Jason Boxman http://edseek.com/ - Linux and FOSS stuff
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