On Sat, Sep 19, 2009 at 4:12 PM, walt <w41...@gmail.com> wrote: > On 09/19/2009 03:38 PM, Mark Knecht wrote: >> >> On Sat, Sep 19, 2009 at 3:21 PM, Mark Knecht<markkne...@gmail.com> wrote: >>> >>> Hi, >>> I seem to have lost an external USB drive I've been using on my >>> MythTV backend server for video storage. What commands can I try to >>> get it to wake up or at least show me what's working and what isn't? >>> The drive shows under fdisk /dev/sda... > > I hate to be the party poop, but I suspect disk hardware failure. > > Can you use dd to read the raw disk? e.g. > # dd if=/dev/sda of=/tmp/ddout bs=512 count=1024(or whatever) >
Hi Walt, Don't worry about it. If it's dead it's dead. I've actually managed to make some headway. After fiddling around with e2fsck -b 32768 /dev/sda1 the drive is now mountable but running e2fsck after a reboot says the drive still has errors: MacMini ~ # e2fsck /dev/sda1 e2fsck 1.41.3 (12-Oct-2008) /dev/sda1 contains a file system with errors, check forced. Pass 1: Checking inodes, blocks, and sizes ^C/dev/sda1: e2fsck canceled. /dev/sda1: ********** WARNING: Filesystem still has errors ********** MacMini ~ # If I mount the drive I can actually see all the MythTV files and amazingly they still seem to play so I don't think the drive is dead. I got a few messages about my backup directory being hosed so I attempted to delete it. Now the drive mounts but the sizes and things are messed up: MacMini ~ # mount /dev/hda4 on / type ext3 (rw,noatime) proc on /proc type proc (rw,nosuid,nodev,noexec) sysfs on /sys type sysfs (rw,nosuid,nodev,noexec) udev on /dev type tmpfs (rw,nosuid,size=10240k,mode=755) devpts on /dev/pts type devpts (rw,nosuid,noexec,gid=5,mode=620) shm on /dev/shm type tmpfs (rw,noexec,nosuid,nodev) usbfs on /proc/bus/usb type usbfs (rw,noexec,nosuid,devmode=0664,devgid=85) /dev/sda1 on /video type ext3 (rw) MacMini ~ # df /video Filesystem 1K-blocks Used Available Use% Mounted on /dev/sda1 157566568 -1551528 151114116 - /video MacMini ~ # MacMini ~ # ls /video/ 1003_20090531163000.mpg.png 1042_20090611190000.mpg.png 1189_20090617183000.mpg.png 1003_20090603173000.mpg.png 1042_20090911210000.mpg 1189_20090619183000.mpg 1003_20090621163000.mpg.png 1042_20090911210000.mpg.png <SNIP> 1017_20090817193000.mpg.png 1189_20090617183000.mpg lost+found 1042_20090611170000.mpg.png 1189_20090617183000.mpg.100x75.png MacMini ~ # Now, my question is how can I use the file system tools to fix all the tables on this drive? I see Volker is suggesting ddrescue. As it seems I've already lost the Windows backup files but have good MYthTV files is there a way to repair the disk tables and only end up with the existing Myth files and clean tables? I don't have another disk to copy all this stuff to and the MacMini is headless and PPC-based so it's difficult to use gparted or anything like that. I think the existing Myth files are possibly small enough that I could store them temporarily on the Mac while I rebuild the USB drive. Thanks, Mark
