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On Sat, Sep 19, 2009 at 4:12 PM, walt <w41ter@×××××.com> wrote: |
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> On 09/19/2009 03:38 PM, Mark Knecht wrote: |
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>> |
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>> On Sat, Sep 19, 2009 at 3:21 PM, Mark Knecht<markknecht@×××××.com> wrote: |
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>>> |
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>>> Hi, |
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>>> I seem to have lost an external USB drive I've been using on my |
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>>> MythTV backend server for video storage. What commands can I try to |
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>>> get it to wake up or at least show me what's working and what isn't? |
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>>> The drive shows under fdisk /dev/sda... |
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> |
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> I hate to be the party poop, but I suspect disk hardware failure. |
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> |
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> Can you use dd to read the raw disk? e.g. |
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> # dd if=/dev/sda of=/tmp/ddout bs=512 count=1024(or whatever) |
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> |
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|
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Hi Walt, |
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Don't worry about it. If it's dead it's dead. |
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|
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I've actually managed to make some headway. After fiddling around |
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with e2fsck -b 32768 /dev/sda1 the drive is now mountable but running |
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e2fsck after a reboot says the drive still has errors: |
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|
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MacMini ~ # e2fsck /dev/sda1 |
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e2fsck 1.41.3 (12-Oct-2008) |
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/dev/sda1 contains a file system with errors, check forced. |
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Pass 1: Checking inodes, blocks, and sizes |
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^C/dev/sda1: e2fsck canceled. |
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|
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/dev/sda1: ********** WARNING: Filesystem still has errors ********** |
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|
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MacMini ~ # |
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|
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If I mount the drive I can actually see all the MythTV files and |
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amazingly they still seem to play so I don't think the drive is dead. |
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I got a few messages about my backup directory being hosed so I |
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attempted to delete it. Now the drive mounts but the sizes and things |
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are messed up: |
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|
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MacMini ~ # mount |
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/dev/hda4 on / type ext3 (rw,noatime) |
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proc on /proc type proc (rw,nosuid,nodev,noexec) |
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sysfs on /sys type sysfs (rw,nosuid,nodev,noexec) |
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udev on /dev type tmpfs (rw,nosuid,size=10240k,mode=755) |
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devpts on /dev/pts type devpts (rw,nosuid,noexec,gid=5,mode=620) |
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shm on /dev/shm type tmpfs (rw,noexec,nosuid,nodev) |
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usbfs on /proc/bus/usb type usbfs (rw,noexec,nosuid,devmode=0664,devgid=85) |
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/dev/sda1 on /video type ext3 (rw) |
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|
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MacMini ~ # df /video |
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Filesystem 1K-blocks Used Available Use% Mounted on |
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/dev/sda1 157566568 -1551528 151114116 - /video |
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MacMini ~ # |
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|
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MacMini ~ # ls /video/ |
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1003_20090531163000.mpg.png 1042_20090611190000.mpg.png |
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1189_20090617183000.mpg.png |
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1003_20090603173000.mpg.png 1042_20090911210000.mpg |
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1189_20090619183000.mpg |
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1003_20090621163000.mpg.png 1042_20090911210000.mpg.png |
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|
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<SNIP> |
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|
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1017_20090817193000.mpg.png 1189_20090617183000.mpg lost+found |
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1042_20090611170000.mpg.png 1189_20090617183000.mpg.100x75.png |
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MacMini ~ # |
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Now, my question is how can I use the file system tools to fix all the |
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tables on this drive? |
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|
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I see Volker is suggesting ddrescue. As it seems I've already lost the |
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Windows backup files but have good MYthTV files is there a way to |
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repair the disk tables and only end up with the existing Myth files |
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and clean tables? I don't have another disk to copy all this stuff to |
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and the MacMini is headless and PPC-based so it's difficult to use |
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gparted or anything like that. |
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I think the existing Myth files are possibly small enough that I could |
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store them temporarily on the Mac while I rebuild the USB drive. |
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|
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Thanks, |
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Mark |
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