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Old 06-01-2009, 04:24 PM   #1
dp-danw
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Registered: Jun 2009
Location: Utah
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Mount External USB ext3, But Reverting to fat32


I'd like to mount an external USB drive for full local backups using rsnapshot. This requires a filesystem like ext3 for the hard links in "cp -al" to work. After I prepared my USB drive with fdisk and mkfs.ext3 the drive is still stuck on FAT32 though.

Disto: ClarkConnect 4.x (CentOS equivalent).

Code:
# fdisk -l
...
Disk /dev/sdd: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot      Start         End      Blocks   Id  System
/dev/sdd1               1       60801   488384001    c  W95 FAT32 (LBA)

Using fdisk /dev/sdd1 I make a new primary partition, type 83, and write it and get this alert:

Code:
The partition table has been altered!

Calling ioctl() to re-read partition table.

WARNING: Re-reading the partition table failed with error 22: Invalid argument.
The kernel still uses the old table.
The new table will be used at the next reboot.
Syncing disks.
This may be obvious, but do I really need a full system restart before it will pick up the new partition information? Is there any other way to lock it in rather than bringing down a production server?
 
Old 06-01-2009, 04:45 PM   #2
MS3FGX
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If it is an external USB drive, I am assuming you tried unplugging it and plugging it back in?
 
Old 06-01-2009, 04:51 PM   #3
dp-danw
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It's at a remote location, so no, I haven't done that. I'll get someone to cycle the device. Is that considered sufficient for a reboot?
 
Old 06-01-2009, 04:52 PM   #4
kolodz1
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Fdisk works on a device, meaning you need to run 'fdisk /dev/sdd' to get the desired effect. You're getting an 'invalid argument' error because /dev/sdd1 points to the partition on the disk and not the disk itself.

You should be able get it all done if you drop the 1 there. Also, make sure you're not working on a mounted filesystem.
 
Old 06-01-2009, 05:12 PM   #5
dp-danw
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Brilliant!

How did I ever get in the bad habit of adding the "1" at the end. So here's the result after running fdisk /dev/sdd and creating the ext3 partition.

Code:
Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.
[root@server ~]# fdisk -l
...
Disk /dev/sdd: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdd1               1       60801   488384001   83  Linux
Much better.
 
  


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