Changing fstab and re-mounting disks
Here is one I can not explain: A user wanted to mount a vfat partition (/dev/hda4) to /mnt/hda4. His fstab had this line in it: /dev/hda4 /mnt/hda4 auto defualts,rw,users,owner,auto,uid=1000 0 0 (uid=username ID). And yet, root:root owned all the files/dirs, that was to be expected, I think, and user could not mkdir or files, permission denied. I had him change the fstab line to this: /dev/hda4 /mnt/hda4 vfat defualts,rw,users,auto,suid=1000,umask=0 0 0 (umask setting is a test, to test writing) umount /dev/hda4 as root. mount /dev/hda4 as user. ls -l on hda4 showed root:root owned all the files (drwxr-xr-x 14 root root ) Could not chown -R user:user /mnt/hda4/* as root, "not allowed". the user ran out of time (life gets in the way), but I found out a few hours latter he "fixed" the problem: From a irc past: (19:18:13) Dbarracuda: what was it? (19:18:22) RABraker: the hell if i know <<(19:18:58) RABraker: i mounted it in /media/hda4 and made arnold the owner of both (19:19:25) RABraker: but it seemed to start working after changing the fstab and rebooting so, here is the question: What did I advise wrongly and why would not a umount, mount /dev/hda4 work? We only wanted user to be the only one to access it. Keep in mind, I really don't know what was finally changed during the above irc session, at this point in time, I only surmise that the changes I recommended were used. I rarely play with vfat anymore, and obviously I am rusty. -- Damon L. Chesser [EMAIL PROTECTED] [EMAIL PROTECTED] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: Mounting disks
Hi When you get "Input/Output" error, there may be a hardware error :-( Check your /var/log/messages. You can check the partition layout using gpart. http://www.stud.uni-hannover.de/user/76201/gpart/, or the deb. Look at man e2fsck, especially -b, -B and -n. HTH Jan-Marek -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: Mounting disks
James Hosken wrote: Quoting Paul Morgan <[EMAIL PROTECTED]>: On Sat, 29 Nov 2003 11:46:13 +, James Hosken wrote: Quoting Carl Fink <[EMAIL PROTECTED]>: On Wed, Nov 26, 2003 at 07:03:57PM +, James Hosken wrote: mount -t ext2 /dev/hdb5 /mnt/old-disk/ and I get the error mount: wrong fs type, bad option, bad superblock on /dev/hdb5, or too many mounted file systems I'm pritty sure that it is the right file systems, I was using Mandrake 8.1 standard setup. I think the disk may be a bit dodgy. Is there any thing that I can do? I know there are several superblocks for this soer of thing. Well, starting from the end: how many filesystems do you have mounted? Run fdisk or cfdisk on /dev/hdb and see what partition type /dev/hdb5 really is. If it's ext2, run e2fsck on it. Thanks for the reply, it is hdb8 that I'm really intrested in rather than hdb5 Here's he result from fdisk Disk /dev/hdb: 41.1 GB, 41174138880 bytes 255 heads, 63 sectors/track, 5005 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/hdb1 * 117 510 3164805b W95 FAT32 /dev/hdb2 511500536106087+ f W95 Ext'd (LBA) /dev/hdb5 511 573 506016 83 Linux /dev/hdb6 574 604 248976 82 Linux swap /dev/hdb7 605 986 3068383+ 83 Linux /dev/hdb8 987500532282586 83 Linux Here is the result from fsck /dev/hdb8 fsck 1.35-WIP (21-Aug-2003) e2fsck 1.35-WIP (21-Aug-2003) fsck.ext2: Attempt to read block from filesystem resulted in short read while tr ying to open /dev/hdb8 Could this be a zero-length partition? I have run fsck on hdb5 and hdb7 as well and they come back with the same error. Any surgestions? Thanks James, What happens if you try to mount any of these without specifying a type? And, if mount is successful, what did it mount it as? Example - what's the output from this? mount /dev/hdb5 /mnt/old-disk/ mount | grep /mnt/old-disk I have tried that before, here the output fork:/etc/apache# mount /dev/hdb5 /mnt/old-disk/ /dev/hdb5: Input/output error mount: mount point /mnt/old-disk/ does not exist I know that there are multiple superblock incase one gets knackered, would using one of these help? How do I do that? Is there a way of finding the superblocks? James James, You must have mistakenly sent this to me rather than the list. You could run mke2fs -n ... which would tell you where it would put the superblocks if it built the filesystem (-n tells it not to actually do it). Then you could try giving one of those superblock values to mount. However, as it was built on a different system and we don't know the parameters mke2fs used to build it, there are no guarantees, but it's worth a try. See "man mke2fs". I assume that sfdisk thinks that your partition table is OK. I mean, I assume that you are sure that the issue is the filesystem. -- paul "They made us many promises, more than I can remember, but they never kept but one: they promised to take our land, and they took it." - Chief Red Cloud (Mahpiua Luta) of the Oglala Sioux -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: Mounting disks
On Sat, 29 Nov 2003 11:46:13 +, James Hosken wrote: > Quoting Carl Fink <[EMAIL PROTECTED]>: > >> On Wed, Nov 26, 2003 at 07:03:57PM +, James Hosken wrote: >> >> > mount -t ext2 /dev/hdb5 /mnt/old-disk/ >> > >> > and I get the error >> > >> > mount: wrong fs type, bad option, bad superblock on /dev/hdb5, >> >or too many mounted file systems >> > I'm pritty sure that it is the right file systems, I was using Mandrake >> 8.1 >> > standard setup. I think the disk may be a bit dodgy. Is there any thing >> that I >> > can do? I know there are several superblocks for this soer of thing. >> >> Well, starting from the end: how many filesystems do you have mounted? >> >> Run fdisk or cfdisk on /dev/hdb and see what partition type /dev/hdb5 >> really is. >> >> If it's ext2, run e2fsck on it. > > > Thanks for the reply, it is hdb8 that I'm really intrested in rather than hdb5 > Here's he result from fdisk > > Disk /dev/hdb: 41.1 GB, 41174138880 bytes > 255 heads, 63 sectors/track, 5005 cylinders > Units = cylinders of 16065 * 512 = 8225280 bytes > >Device Boot Start End Blocks Id System > /dev/hdb1 * 117 510 3164805b W95 FAT32 > /dev/hdb2 511500536106087+ f W95 Ext'd (LBA) > /dev/hdb5 511 573 506016 83 Linux > /dev/hdb6 574 604 248976 82 Linux swap > /dev/hdb7 605 986 3068383+ 83 Linux > /dev/hdb8 987500532282586 83 Linux > > > Here is the result from fsck /dev/hdb8 > > fsck 1.35-WIP (21-Aug-2003) > e2fsck 1.35-WIP (21-Aug-2003) > fsck.ext2: Attempt to read block from filesystem resulted in short read while tr > ying to open /dev/hdb8 > Could this be a zero-length partition? > > > > I have run fsck on hdb5 and hdb7 as well and they come back with the same error. > Any surgestions? > Thanks James, What happens if you try to mount any of these without specifying a type? And, if mount is successful, what did it mount it as? Example - what's the output from this? mount /dev/hdb5 /mnt/old-disk/ mount | grep /mnt/old-disk -- paul "The average lifespan of a Web page today is 100 days. This is no way to run a culture." Internet Archive Board Chairman -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: Mounting disks
Quoting Carl Fink <[EMAIL PROTECTED]>: > On Wed, Nov 26, 2003 at 07:03:57PM +, James Hosken wrote: > > > mount -t ext2 /dev/hdb5 /mnt/old-disk/ > > > > and I get the error > > > > mount: wrong fs type, bad option, bad superblock on /dev/hdb5, > >or too many mounted file systems > > I'm pritty sure that it is the right file systems, I was using Mandrake > 8.1 > > standard setup. I think the disk may be a bit dodgy. Is there any thing > that I > > can do? I know there are several superblocks for this soer of thing. > > Well, starting from the end: how many filesystems do you have mounted? > > Run fdisk or cfdisk on /dev/hdb and see what partition type /dev/hdb5 > really is. > > If it's ext2, run e2fsck on it. Thanks for the reply, it is hdb8 that I'm really intrested in rather than hdb5 Here's he result from fdisk Disk /dev/hdb: 41.1 GB, 41174138880 bytes 255 heads, 63 sectors/track, 5005 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/hdb1 * 117 510 3164805b W95 FAT32 /dev/hdb2 511500536106087+ f W95 Ext'd (LBA) /dev/hdb5 511 573 506016 83 Linux /dev/hdb6 574 604 248976 82 Linux swap /dev/hdb7 605 986 3068383+ 83 Linux /dev/hdb8 987500532282586 83 Linux Here is the result from fsck /dev/hdb8 fsck 1.35-WIP (21-Aug-2003) e2fsck 1.35-WIP (21-Aug-2003) fsck.ext2: Attempt to read block from filesystem resulted in short read while tr ying to open /dev/hdb8 Could this be a zero-length partition? I have run fsck on hdb5 and hdb7 as well and they come back with the same error. Any surgestions? Thanks -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: Mounting disks
On Wed, Nov 26, 2003 at 07:03:57PM +, James Hosken wrote: > mount -t ext2 /dev/hdb5 /mnt/old-disk/ > > and I get the error > > mount: wrong fs type, bad option, bad superblock on /dev/hdb5, >or too many mounted file systems > I'm pritty sure that it is the right file systems, I was using Mandrake 8.1 > standard setup. I think the disk may be a bit dodgy. Is there any thing that I > can do? I know there are several superblocks for this soer of thing. Well, starting from the end: how many filesystems do you have mounted? Run fdisk or cfdisk on /dev/hdb and see what partition type /dev/hdb5 really is. If it's ext2, run e2fsck on it. -- Carl Fink [EMAIL PROTECTED] Jabootu's Minister of Proofreading http://www.jabootu.com -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
