Re: [gentoo-user] failed reiserfs partition - help!
On Tue, 2010-08-24 at 10:44 -0400, James wrote: > Albert, > > Thanks for the response. > > "dd" for the lazy -- takes 2 seconds to wipe the top of the drive > instead of getting rid of numerous partitions that the manufacturer > put on the drive. But what I'm saying is... you "wipe" the partition table and then you use fdisk (or whatever) to create partitions. The very act using fdisk and writing to the partition table wipes out the previous one. The sending $25 to namesys part was a joke. Namesys isn't around anymore.
Re: [gentoo-user] failed reiserfs partition - help!
James writes: > My friend threw a theory out there -- maybe the beginning of the > partition is incorrect on the drive? The drive originally had an NTFS > partition. By blowing away the beginning of the drive and then > rewriting the partition table, maybe the kernel was using the original > "beginning" location of the NTFS partition which *may* be incorrect > for the beginning of the reiserfs /dev/sdX1 partition. I did *NOT* > reboot after making changes to the partition table (nor did I > disconnect / reconnect the drive). > > Is this possible? Hm. May be worth a try. I usually use the partprobe (sys-block/parted) command to make the kernel recognize the new partition layout. Not sure if this is always necessary. > I'm 99.9% sure this drive is not defective. There has to be some > way to mount this partition as it was cleanly unmounted and the data > copied over with no issues when I was originally doing it. > > Isn't there a way to search for a superblock on the drive and then use > that when attempting to mount the partition? Install app-admin/testdisk, this will allow to find and recreate deleted partition schemes. Good luck, Wonko
Re: [gentoo-user] failed reiserfs partition - help!
Sorry -- it's a USB device so the drive letter has changed as I've moved the drive around. My friend threw a theory out there -- maybe the beginning of the partition is incorrect on the drive? The drive originally had an NTFS partition. By blowing away the beginning of the drive and then rewriting the partition table, maybe the kernel was using the original "beginning" location of the NTFS partition which *may* be incorrect for the beginning of the reiserfs /dev/sdX1 partition. I did *NOT* reboot after making changes to the partition table (nor did I disconnect / reconnect the drive). Is this possible? I'm 99.9% sure this drive is not defective. There has to be some way to mount this partition as it was cleanly unmounted and the data copied over with no issues when I was originally doing it. Isn't there a way to search for a superblock on the drive and then use that when attempting to mount the partition? -james On Tue, Aug 24, 2010 at 12:31 PM, Mick wrote: > On 24 August 2010 15:46, James wrote: >> Yep, positive. Just checked through my history: >> >> mkreiserfs -f /dev/sdd1 >> mount /dev/sdd1 /mnt/backup > > Hmm ... if you have made a fs on sdd1, why are you trying to mount > sdf1 in your first post? > > ... or is sdd1 now being recognised by udev as sdf1? > > I am not sure I can suggest anything better than what you have already > tried. I have recovered umpteen reiserfs corruptions with no loss of > data so far, by running reiserfsck --fix-fixable, or --rebuild-tree. > However, none of these problems were due to a problematic drive or USB > cable - your case may be different and recovery less successful. > > Of course, if you have storage space somewhere else it is always a > good idea to use dd to image the partition first before you start your > recovery attempts. > -- > Regards, > Mick > >
Re: [gentoo-user] failed reiserfs partition - help!
On 24 August 2010 15:46, James wrote: > Yep, positive. Just checked through my history: > > mkreiserfs -f /dev/sdd1 > mount /dev/sdd1 /mnt/backup Hmm ... if you have made a fs on sdd1, why are you trying to mount sdf1 in your first post? ... or is sdd1 now being recognised by udev as sdf1? I am not sure I can suggest anything better than what you have already tried. I have recovered umpteen reiserfs corruptions with no loss of data so far, by running reiserfsck --fix-fixable, or --rebuild-tree. However, none of these problems were due to a problematic drive or USB cable - your case may be different and recovery less successful. Of course, if you have storage space somewhere else it is always a good idea to use dd to image the partition first before you start your recovery attempts. -- Regards, Mick
Re: [gentoo-user] failed reiserfs partition - help!
Yep, positive. Just checked through my history: mkreiserfs -f /dev/sdd1 mount /dev/sdd1 /mnt/backup While I'm not opposed to paying $25 to namesys, I'm (a) not certain they will able to fix this cluster, and (b) I'm more inclined to turn to the open source community for help. Googling reveals this is not a "rare" issue, but no one seems to have a really great solution to the problem. Any other thoughts / ideas would be greatly appreciated. -james On Tue, Aug 24, 2010 at 2:11 AM, Adam Carter wrote: > Just checking, you ran mkreiserfs against /dev/sdf1 not /dev/sdf didnt you? > >
Re: [gentoo-user] failed reiserfs partition - help!
Albert, Thanks for the response. "dd" for the lazy -- takes 2 seconds to wipe the top of the drive instead of getting rid of numerous partitions that the manufacturer put on the drive. The disk isn't bad -- if it was then I wouldn't have the ability to recover the files via foremost / scalpel. -james On Tue, Aug 24, 2010 at 1:53 AM, Albert Hopkins wrote: > On Tue, 2010-08-24 at 04:57 +, James wrote: > [...] >> try www.namesys.com/support.html, and for >> $25 the author of fsck, or a colleague if he is out, will step you >> through it all. > > Did you try that? ;) > > It's probably a bad disk and you need to take it back... > > Not sure why you had to dd/urandom to clear the partition table. Just > simple running fdisk and saving will re-write over what previously > existed in the partition table. > > >
Re: [gentoo-user] failed reiserfs partition - help!
Just checking, you ran mkreiserfs against /dev/sdf1 not /dev/sdf didnt you?
Re: [gentoo-user] failed reiserfs partition - help!
On Tue, 2010-08-24 at 04:57 +, James wrote: [...] > try www.namesys.com/support.html, and for > $25 the author of fsck, or a colleague if he is out, will step you > through it all. Did you try that? ;) It's probably a bad disk and you need to take it back... Not sure why you had to dd/urandom to clear the partition table. Just simple running fdisk and saving will re-write over what previously existed in the partition table.
